photoplethysmography

Summary

Summary: Plethysmographic determination in which the intensity of light reflected from the skin surface and the red cells below is measured to determine the blood volume of the respective area. There are two types, transmission and reflectance.

Top Publications

  1. ncbi Determination of age-related increases in large artery stiffness by digital pulse contour analysis
    S C Millasseau
    Department of Clinical Pharmacology, St Thomas Hospital, Centre for Cardiovascular Biology and Medicine, King s College London, Lambeth Palace Road, London SE1 7EH, UK
    Clin Sci (Lond) 103:371-7. 2002
  2. ncbi Contour analysis of the photoplethysmographic pulse measured at the finger
    Sandrine C Millasseau
    Cardiovascular Division, King s College London School of Medicine, London, UK
    J Hypertens 24:1449-56. 2006
  3. ncbi The effect of applied sensor contact force on pulse transit time
    X F Teng
    The Joint Research Center for Biomedical Engineering, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
    Physiol Meas 27:675-84. 2006
  4. ncbi Pulse transit time measured from the ECG: an unreliable marker of beat-to-beat blood pressure
    R A Payne
    Clinical Pharmacology Unit, University of Edinburgh, Western General Hospital, Crewe Rd, Edinburgh, EH4 2XU, United Kingdom
    J Appl Physiol (1985) 100:136-41. 2006
  5. ncbi Association of risk factors with increased pulse wave velocity detected by a novel method using dual-channel photoplethysmography
    Wei Chuan Tsai
    Department of Internal Medicine, National Cheng Kung University Medical Center, Tainan, Taiwan
    Am J Hypertens 18:1118-22. 2005
  6. ncbi Photoplethysmography and its application in clinical physiological measurement
    John Allen
    Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, UK
    Physiol Meas 28:R1-39. 2007
  7. ncbi Utility of second derivative of the finger photoplethysmogram for the estimation of the risk of coronary heart disease in the general population
    Toshiaki Otsuka
    Environmental Medicine, Graduate School of Medicine, Tama Nagayama Hospital, Nippon Medical School, Tokyo, Japan
    Circ J 70:304-10. 2006
  8. ncbi The difference in pulse transit time to the toe and finger measured by photoplethysmography
    M Nitzan
    Department of Applied Physics Electro Optics, Jerusalem College of Technology, Israel
    Physiol Meas 23:85-93. 2002
  9. ncbi Assessment of the vascular effects of PC6 (Neiguan) using the second derivative of the finger photoplethysmogram in healthy and hypertensive subjects
    José F Rivas-Vilchis
    Programa de Doctorado en Ciencias Biológicas, Universidad Autonoma Metropolitana, campus Iztapalapa, Distrito Federal, Mexico
    Am J Chin Med 35:427-36. 2007
  10. doi Measuring pulse wave velocity using ECG and photoplethysmography
    An Bang Liu
    Department of Electrical Engineering, National Dong Hwa University, Hualien, Taiwan
    J Med Syst 35:771-7. 2011

Research Grants

  1. AUTONOMIC FUNCTION AND POSTTRANSPLANT QUALITY OF LIFE
    Donna Hathaway; Fiscal Year: 1999
  2. Effects of Early Abuse on Adult Intimate Relationships
    Cindy Meston; Fiscal Year: 2007
  3. Ginkgo Biloba: Antidepressant-Induced Sexual Dysfunction
    Cindy Meston; Fiscal Year: 2003
  4. Effects of Early Abuse on Adult Intimate Relationships
    Cindy M Meston; Fiscal Year: 2010
  5. HRCA/HARVARD RESEARCH NURSING HOME
    Lewis Lipsitz; Fiscal Year: 2007
  6. OCULOMOTOR SYSTEM AND BODY POSTURAL MECHANISMS
    Bernard Cohen; Fiscal Year: 2002
  7. Nonlinear Dynamics of Frailty in Aging
    Lewis Lipsitz; Fiscal Year: 2007
  8. OCULOMOTOR SYSTEM AND BODY POSTURAL MECHANISMS
    Bernard Cohen; Fiscal Year: 2009
  9. HARVARD OLDER AMERICANS INDEPENDENCE CENTER
    Lewis Lipsitz; Fiscal Year: 2006
  10. CORE CENTER
    Bernard Cohen; Fiscal Year: 2007

Detail Information

Publications227 found, 100 shown here

  1. ncbi Determination of age-related increases in large artery stiffness by digital pulse contour analysis
    S C Millasseau
    Department of Clinical Pharmacology, St Thomas Hospital, Centre for Cardiovascular Biology and Medicine, King s College London, Lambeth Palace Road, London SE1 7EH, UK
    Clin Sci (Lond) 103:371-7. 2002
    ..stiffness (SI(DVP)) derived from the digital volume pulse (DVP) measured by transmission of IR light (photoplethysmography) was examined...
  2. ncbi Contour analysis of the photoplethysmographic pulse measured at the finger
    Sandrine C Millasseau
    Cardiovascular Division, King s College London School of Medicine, London, UK
    J Hypertens 24:1449-56. 2006
    ..This review describes the background to digital volume pulse contour analysis, how the technique relates to contour analysis of the pressure pulse, and current and future applications...
  3. ncbi The effect of applied sensor contact force on pulse transit time
    X F Teng
    The Joint Research Center for Biomedical Engineering, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
    Physiol Meas 27:675-84. 2006
    ..peak of the electrocardiogram (ECG) R wave and a characteristic point of the peripheral pulse measured by photoplethysmography. However, it was found that the photoplethysmogram (PPG) is affected by the contact force between the ..
  4. ncbi Pulse transit time measured from the ECG: an unreliable marker of beat-to-beat blood pressure
    R A Payne
    Clinical Pharmacology Unit, University of Edinburgh, Western General Hospital, Crewe Rd, Edinburgh, EH4 2XU, United Kingdom
    J Appl Physiol (1985) 100:136-41. 2006
    ..DBP and MAP cannot be predicted from rPTT without correction for PEP. The significant contribution of PEP to rPTT means that rPTT should not be used as a marker of purely vascular function...
  5. ncbi Association of risk factors with increased pulse wave velocity detected by a novel method using dual-channel photoplethysmography
    Wei Chuan Tsai
    Department of Internal Medicine, National Cheng Kung University Medical Center, Tainan, Taiwan
    Am J Hypertens 18:1118-22. 2005
    ..This study presents a new method for measuring the arterial PWV by simultaneously recording the digital volume pulse through the finger and the toe by way of dual-channel photoplethysmography (PPG).
  6. ncbi Photoplethysmography and its application in clinical physiological measurement
    John Allen
    Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, UK
    Physiol Meas 28:R1-39. 2007
    b>Photoplethysmography (PPG) is a simple and low-cost optical technique that can be used to detect blood volume changes in the microvascular bed of tissue. It is often used non-invasively to make measurements at the skin surface...
  7. ncbi Utility of second derivative of the finger photoplethysmogram for the estimation of the risk of coronary heart disease in the general population
    Toshiaki Otsuka
    Environmental Medicine, Graduate School of Medicine, Tama Nagayama Hospital, Nippon Medical School, Tokyo, Japan
    Circ J 70:304-10. 2006
    ....
  8. ncbi The difference in pulse transit time to the toe and finger measured by photoplethysmography
    M Nitzan
    Department of Applied Physics Electro Optics, Jerusalem College of Technology, Israel
    Physiol Meas 23:85-93. 2002
    ..study, pulse transit time (PTT) to the toes and fingers of 44 normotensive male subjects was measured by photoplethysmography (PPG) and ECG...
  9. ncbi Assessment of the vascular effects of PC6 (Neiguan) using the second derivative of the finger photoplethysmogram in healthy and hypertensive subjects
    José F Rivas-Vilchis
    Programa de Doctorado en Ciencias Biológicas, Universidad Autonoma Metropolitana, campus Iztapalapa, Distrito Federal, Mexico
    Am J Chin Med 35:427-36. 2007
    ..Moreover, PC6 needling produced changes in SD(DVP) indices related to both large artery stiffness and the reflected wave originating in small arteries...
  10. doi Measuring pulse wave velocity using ECG and photoplethysmography
    An Bang Liu
    Department of Electrical Engineering, National Dong Hwa University, Hualien, Taiwan
    J Med Syst 35:771-7. 2011
    ..Herein we presented a novel and reliable measurement of PWV. The changes of PWV in different regions may be used in predicting disease processes such as stroke, coronary artery diseases and renal diseases, respectively...
  11. pmc A synchronous multi-body sensor platform in a Wireless Body Sensor Network: design and implementation
    Yeongjoon Gil
    Graduate School of Computer Science and Engineering, Pusan National University, Pusan 609 735, Korea
    Sensors (Basel) 12:10381-94. 2012
    ....
  12. ncbi The relationship between the photoplethysmographic waveform and systemic vascular resistance
    Aymen A Awad
    Department of Anesthesiology, Yale University School of Medicine, 333 Cedar Street, P O Box 208051, New Haven, CT 06520 8051, USA
    J Clin Monit Comput 21:365-72. 2007
    ..The objective of this study was to determine the relationship between systemic vascular resistance (SVR), finger & ear photoplethysmographic measurements in 14 adult patients undergoing coronary artery bypass grafting (CABG)...
  13. ncbi Predicting arterial stiffness from the digital volume pulse waveform
    Stephen R Alty
    King s College London, Centre for Digital Signal Processing Research, Division of Engineering, Strand, London WC2R 2LS UK
    IEEE Trans Biomed Eng 54:2268-75. 2007
    ..This technique could be usefully employed as a cheap and effective CVD screening technique for use in general practice clinics...
  14. pmc Evaluation of electrical and optical plethysmography sensors for noninvasive monitoring of hemoglobin concentration
    Justin P Phillips
    School of Engineering and Mathematical Sciences, City University London, Northampton Square, London EC1V 0HB, UK
    Sensors (Basel) 12:1816-26. 2012
    ..The ratio PPG:CPG is invariant to pulse pressure. This quantity is discussed as a possible index of in vivo hemoglobin concentration...
  15. ncbi Photoplethysmography: beyond the calculation of arterial oxygen saturation and heart rate
    Kirk H Shelley
    Department of Anesthesiology, Yale University, New Haven, Connecticut, USA
    Anesth Analg 105:S31-6, tables of contents. 2007
    ..In the long run, we need to learn how to consistently quantify the characteristics of the PPG in such a way as to allow the results from research efforts be translated into clinically useful devices...
  16. ncbi Investigation of chronic venous insufficiency: A consensus statement (France, March 5-9, 1997)
    A N Nicolaides
    Irvine Laboratory for Cardiovascular Investigation and Research, Department of Vascular Surgery, Imperial College School of Medicine St Mary s Campus, London W2 1NY, UK
    Circulation 102:E126-63. 2000
    ..Subsequent input by co-opted faculty members and revisions in 1998 and 1999 have ensured a document that provides an up-to-date account of the various methods available for the investigation of CVI...
  17. doi Towards using photo-plethysmogram amplitude to measure blood pressure during sleep
    Eric Chern Pin Chua
    School of Electrical, Electronic and Mechanical Engineering, University College Dublin, Belfield, Dublin 4, Ireland
    Ann Biomed Eng 38:945-54. 2010
    ..7, p<0.001). These results suggest that pulse amplitude is potentially a more suitable measure than pulse arrival time for estimating continuous blood pressure...
  18. ncbi Mobile monitoring with wearable photoplethysmographic biosensors
    H Harry Asada
    Brit and Alex d Arbeloff Laboratory for Information Systems and Technology, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
    IEEE Eng Med Biol Mag 22:28-40. 2003
  19. ncbi Optical techniques in the assessment of peripheral arterial disease
    Mohamad E Alnaeb
    Vascular Unit, Royal Free Hampstead NHS Trust Hospital, London, UK
    Curr Vasc Pharmacol 5:53-9. 2007
    ..This review discusses the application of PPG in the assessment of PAD...
  20. ncbi Cardiac resynchronization therapy optimization by finger plethysmography
    Christian Butter
    Department of Cardiology, German Heart Institute Berlin
    Heart Rhythm 1:568-75. 2004
    We tested a simple noninvasive method for cardiac resynchronization therapy (CRT) optimization using standard finger photoplethysmography (FPPG).
  21. ncbi A LED-LED-based photoplethysmography sensor
    R Stojanovic
    Faculty of Electrical Engineering, University of Montenegro, Montenegro
    Physiol Meas 28:N19-27. 2007
    A high sensitivity, low power and low cost sensor has been developed for photoplethysmography (PPG) measurement...
  22. ncbi Can photoplethysmography variability serve as an alternative approach to obtain heart rate variability information?
    Sheng Lu
    Department of Biomedical Engineering, State University of New York, Stony Brook, NY 11794 8181, USA
    J Clin Monit Comput 22:23-9. 2008
    ..b>Photoplethysmography (PPG) is a noninvasive method to monitor arterial oxygen saturation on a continuous basis...
  23. ncbi Length-normalized pulse photoplethysmography: a noninvasive method to measure blood hemoglobin
    Thomas K Aldrich
    Pulmonary Medicine Division, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, NY10467, USA
    Ann Biomed Eng 30:1291-8. 2002
    ..5%. With further development, this technique may reduce the need for phlebotomy, thereby reducing risks and costs and improving the experience of being a patient...
  24. ncbi Using the morphology of photoplethysmogram peaks to detect changes in posture
    Stephen P Linder
    Department of Computer Science, Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
    J Clin Monit Comput 20:151-8. 2006
    ..These three features therefore can be used as a detector of the baroreflex response to changes in posture or other forms of blood volume sequestration...
  25. doi Photoplethysmography and nociception
    I Korhonen
    Department of Anaesthesia, Tampere University Hospital, Tampere, Finland
    Acta Anaesthesiol Scand 53:975-85. 2009
    b>Photoplethysmography (PPG), i.e. pulse oximetric wave, is a non-invasive technique that is used in anaesthesia monitoring primarily to monitor blood oxygenation...
  26. ncbi Automatic ankle pressure measurements using PPG in ankle-brachial pressure index determination
    B Jonsson
    Department of Cardiovascular Surgery and Anaesthesia, University Hospital, Linkoping, Sweden
    Eur J Vasc Endovasc Surg 30:395-401. 2005
    ..To evaluate a new technique using a photoplethysmographic (PPG) probe for automatic ankle pressure measurements...
  27. ncbi Measurement of sexual arousal in postoperative male-to-female transsexuals using vaginal photoplethysmography
    Anne A Lawrence
    Department of Psychology, Northwestern University, Evanston, Illinois, USA
    Arch Sex Behav 34:135-45. 2005
    ..We used vaginal photoplethysmography to examine patterns of sexual arousal in 11 male-to-female (MtF) transsexuals following sex reassignment ..
  28. ncbi Toe blood pressure measurements in patients suspected of leg ischaemia: a new laser Doppler device compared with photoplethysmography
    D Th Ubbink
    Department of Surgery, Academic Medical Centre, Amsterdam, The Netherlands
    Eur J Vasc Endovasc Surg 27:629-34. 2004
    To study the usefulness of a new laser Doppler (LD) device as compared with photoplethysmography (PPG) to measure toe systolic blood pressures (TBP) in patients suspected of arterial insufficiency of the legs.
  29. doi Blood flow measurements at different depths using photoplethysmography and laser Doppler techniques
    Sara Bergstrand
    Department of Medical and Health Sciences, Linkoping University, Linkoping, Sweden
    Skin Res Technol 15:139-47. 2009
    This study has evaluated a multi-parametric system combining laser Doppler flowmetry and photoplethysmography in a single probe for the simultaneous measurement of blood flow at different depths in the tissue...
  30. ncbi A computational system to optimise noise rejection in photoplethysmography signals during motion or poor perfusion states
    Jong Yong A Foo
    Biomedical Engineering Research Centre, Nanyang Technological University, 50 Nanyang Drive, Research Techno Plaza, 6th Storey, XFrontiers Block, Singapore, 637553 Singapore
    Med Biol Eng Comput 44:140-5. 2006
    b>Photoplethysmography (PPG) signals can be used in clinical assessment such as heart rate (HR) estimations and extraction of arterial flow waveforms...
  31. doi Fingertip photoplethysmographic waveform variability and systemic vascular resistance in intensive care unit patients
    Paul M Middleton
    Ambulance Research Institute, Ambulance Service of New South Wales, Sydney, NSW 2039, Australia
    Med Biol Eng Comput 49:859-66. 2011
    ....
  32. doi Multivariate classification of systemic vascular resistance using photoplethysmography
    Qim Y Lee
    Biomedical Systems Laboratory, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW 2052, Australia
    Physiol Meas 32:1117-32. 2011
    ..The results highlight the feasibility of deploying a multivariate statistical approach of SVR classification in the clinical setting, simply using a non-invasive and easy-to-measure PPG waveform signal...
  33. doi A novel photoplethysmography technique to derive normalized arterial stiffness as a blood pressure independent measure in the finger vascular bed
    Gohichi Tanaka
    Department of Psychology, Center for Medical Education, Sapporo Medical University, South 1 West 17, Chuo Ku, Sapporo, Japan
    Physiol Meas 32:1869-83. 2011
    ..72% (study 3: n = 6). The mean and SD of the FSI in seven arteriosclerotic patients were 100.0 ± 13.5. In conclusion, the FEI and FSI by simple estimation are valid and useful for arteriosclerosis research...
  34. doi Effect of pain on autonomic nervous system indices derived from photoplethysmography in healthy volunteers
    K Hamunen
    Pain Clinic, Department of Anaesthesia and Intensive Care, Helsinki University Central Hospital, PO Box 140, Helsinki FIN 00029 HUS, Finland
    Br J Anaesth 108:838-44. 2012
    ..The aim of our study was to correlate the intensity of experimental pain to changes in physiological variables reflecting the autonomic nervous system response to pain...
  35. pmc Finger photoplethysmography during the Valsalva maneuver reflects left ventricular filling pressure
    Harry A Silber
    Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
    Am J Physiol Heart Circ Physiol 302:H2043-7. 2012
    ..In this study, we tested whether Valsalva-induced changes in the pulse amplitude of finger photoplethysmography (PPG), a technology already widely available in medical settings, correlate with invasively measured left ..
  36. doi Photoplethysmography for non-invasive in vivo measurement of bone hemodynamics
    Jaime Mateus
    Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Mass Ave, Cambridge, MA 02139, USA
    Physiol Meas 33:1027-42. 2012
    Developments in photoplethysmography (PPG) hardware make this device a promising tool for non-invasive deep-tissue hemodynamic measurements...
  37. pmc On the analysis of fingertip photoplethysmogram signals
    Mohamed Elgendi
    School of Engineering and Information Technology, Charles Darwin University, Australia
    Curr Cardiol Rev 8:14-25. 2012
    b>Photoplethysmography (PPG) is used to estimate the skin blood flow using infrared light...
  38. doi A technique based on laser Doppler flowmetry and photoplethysmography for simultaneously monitoring blood flow at different tissue depths
    J Hagblad
    School of Innovation, Design and Engineering, Malardalen University, Box 883, 721 23, Vasteras, Sweden
    Med Biol Eng Comput 48:415-22. 2010
    ..optical probe for simultaneous blood flow measurement at different vascular depths combining three photoplethysmography (PPG) channels and laser Doppler flowmeter (LDF)...
  39. ncbi Effects of parametric speaker sound on physiological functions during mental task
    Soomin Lee
    Graduate School of Engineering, Chiba University, Chiba, Japan
    J Physiol Anthropol 30:9-14. 2011
    ..Furthermore, we verified that the reaction time with the parametric speaker is shorter than that with the general speaker...
  40. doi Peripheral photoplethysmography variability analysis of sepsis patients
    Paul M Middleton
    Prince of Wales Clinical School, University of New South Wales, Kensington, NSW, 2031, Australia
    Med Biol Eng Comput 49:337-47. 2011
    ..The study highlighted the value of PPG spectral analysis in the non-invasive assessment of peripheral vascular regulation in sepsis patients, with potential implications in monitoring the progression of sepsis...
  41. doi ECG/PPG integer signal processing for a ubiquitous health monitoring system
    Woosik Shin
    Department of Electronics and Information, Seoul National University of Technology, 172 Kongneung dong Nowon gu, Seoul, South Korea, 139 743
    J Med Syst 34:891-8. 2010
    ..If our algorithm were not used, our health monitor should have used additional microcontrollers or DSP chip. The proposed algorithm reduced the size and cost of our health monitor substantially...
  42. pmc Non-invasive estimation of systolic blood pressure and diastolic blood pressure using photoplethysmograph components
    Incheol Jeong
    Department of Biomedical Engineering, Yonsei University, 234 Meaji, Heungeup, Wonju 220 710, Korea
    Yonsei Med J 51:345-53. 2010
    b>Photoplethysmography (PPG) is a noninvasive optical technology that detects changes in blood volume in the vascular system. This study aimed to investigate the possibilities of monitoring the cardiovascular system status by using PPG.
  43. doi The non-invasive and continuous estimation of cardiac output using a photoplethysmogram and electrocardiogram during incremental exercise
    L Wang
    Department of Electronic Engineering, Joint Research Center for Biomedical Engineering JCBME, The Chinese University of Hong Kong, Hong Kong SAR
    Physiol Meas 31:715-26. 2010
    ..The percent errors were 21.94% and 24.90%, smaller than the clinical acceptance limit (30%). To conclude, after calibration, this method can be used to monitor CO on healthy subjects during incremental intensity exercise...
  44. doi Measuring venous oxygenation using the photoplethysmograph waveform
    Zachary D Walton
    Department of Anesthesiology, Yale University School of Medicine, 333 Cedar Street, P O Box 208051, New Haven, CT 06520 8051, USA
    J Clin Monit Comput 24:295-303. 2010
    ..We investigate the hypothesis that the photoplethysmograph (PPG) waveform can be analyzed to infer regional venous oxygen saturation...
  45. ncbi Respiration can be monitored by photoplethysmography with high sensitivity and specificity regardless of anaesthesia and ventilatory mode
    L Nilsson
    Department of Anaesthesiology and Intensive Care, Linkoping University Hospital, Linkoping, Sweden
    Acta Anaesthesiol Scand 49:1157-62. 2005
    b>Photoplethysmography (PPG) is a non-invasive optical technique used, for instance, in pulse oximetry. Beside the pulse synchronous component, PPG has a respiratory synchronous variation (PPGr)...
  46. doi Investigating a smartphone imaging unit for photoplethysmography
    E Jonathan
    Tissue Optics and Microcirculation Imaging Facility, National Biophotonics and Imaging Platform Ireland, UK
    Physiol Meas 31:N79-83. 2010
    ..The returned signals carry useful PPG signals and were used, for example, to compute change in heart rate. Our results are encouraging, especially in the area of personal and home-based care applications...
  47. ncbi Photoplethysmography for simultaneous recording of heart and respiratory rates in newborn infants
    E Olsson
    Department of Women s and Children s Health, Uppsala University, Sweden
    Acta Paediatr 89:853-61. 2000
    ..The aim of this study was to compare the heart and respiratory rates recorded in infants by photoplethysmography with a probe positioned on three monitoring sites, namely the leg, buttock and interscapular region, with ..
  48. ncbi Pulse transit time by R-wave-gated infrared photoplethysmography: review of the literature and personal experience
    Jochanan E Naschitz
    Departmentments of Internal Medicine A, Bnai Zion Medical Center and Bruce Rappaport Faculty of Medicine, Technion Israel Institute of Technology, Haifa, Israel
    J Clin Monit Comput 18:333-42. 2004
    ..the R-wave on the electrocardiogram and the onset of the corresponding pulse in the finger pad measured by photoplethysmography can be easily measured...
  49. ncbi Photoplethysmography detection of lower limb peripheral arterial occlusive disease: a comparison of pulse timing, amplitude and shape characteristics
    John Allen
    Regional Medical Physics Department Freeman Hospital, Newcastle upon Tyne, UK
    Physiol Meas 26:811-21. 2005
    ..In this study we investigated the clinical value of objective photoplethysmography (PPG) pulse measurements collected simultaneously from the right and left great toes to diagnose disease in ..
  50. ncbi Cuffless blood pressure monitoring using hydrostatic pressure changes
    Phillip A Shaltis
    Massachusetts General Hospital, Boston, MA 02114, USA
    IEEE Trans Biomed Eng 55:1775-7. 2008
    ..This new methodology provides the distinct advantage of using an absolute gauge pressure reference for measurements, and does not necessarily require additional actuation...
  51. doi A prospective comparison of bilateral photoplethysmography versus the ankle-brachial pressure index for detecting and quantifying lower limb peripheral arterial disease
    John Allen
    Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, United Kingdom
    J Vasc Surg 47:794-802. 2008
    This study prospectively assessed the diagnostic accuracy of a novel bilateral photoplethysmography toe pulse measurement technique for the detection of significant lower limb peripheral arterial disease.
  52. ncbi Preliminary evidence that acute and chronic daily psychological stress affect sexual arousal in sexually functional women
    Moniek M ter Kuile
    Department of Psychosomatic Gynaecology and Sexology, Leiden University Medical Center, Leiden, The Netherlands
    Behav Res Ther 45:2078-89. 2007
    ..Genital sexual arousal was assessed using vaginal photoplethysmography. Self-report ratings of subjective sexual arousal were collected after the erotic stimulus...
  53. ncbi The effect of pain-related fear on sexual arousal in women with superficial dyspareunia
    Marieke Brauer
    Department of Psychosomatic Gynecology and Sexology, Leiden University Medical Center, Poortgebouw Zuid, Rijnsburgerweg 10, 2300, RC Leiden, The Netherlands
    Eur J Pain 11:788-98. 2007
    ..Genital arousal was assessed using vaginal photoplethysmography. Self-reported ratings of genital sensations and affect were collected after both erotic stimulus ..
  54. ncbi A new method of screening for diabetic neuropathy using laser Doppler and photoplethysmography
    Sung Woo Kim
    Department of Medical Engineering, College of Medicine, Yonsei University, Seoul, South Korea
    Med Biol Eng Comput 46:61-7. 2008
    ..We measured blood volume changes by photoplethysmography (PPG) and blood perfusion by laser Doppler (LD) in the index fingers and big toes in 40 control subjects ..
  55. ncbi Respiratory variations in the reflection mode photoplethysmographic signal. Relationships to peripheral venous pressure
    L Nilsson
    Department of Anaesthesiology and Intensive Care, Linkoping University Hospital, Linkoping, Sweden
    Med Biol Eng Comput 41:249-54. 2003
    b>Photoplethysmography (PPG) is a non-invasive optical way of measuring variations in blood volume and perfusion in the tissue, used in pulse oximetry for instance...
  56. ncbi Very low frequency variability in arterial blood pressure and blood volume pulse
    M Nitzan
    Department of Applied Physics Electro Optics, Jerusalem College of Technology, Israel
    Med Biol Eng Comput 37:54-8. 1999
    ....
  57. ncbi Pulse wave velocity and the second derivative of the finger photoplethysmogram in treated hypertensive patients: their relationship and associating factors
    Junichiro Hashimoto
    Department of Clinical Pharmacology and Therapeutics, Tohoku University Graduate School of Medicine and Pharmaceutical Science, Sendai, Japan
    J Hypertens 20:2415-22. 2002
    ..To clarify the factors influencing two measures of arterial stiffness, pulse wave velocity (PWV) and the second derivative of the finger photoplethysmogram (SDPTG), and to evaluate their relationship in treated hypertensive subjects...
  58. ncbi EEG spectral entropy, heart rate, photoplethysmography and motor responses to skin incision during sevoflurane anaesthesia
    E R J Seitsonen
    Department of Anaesthesia and Intensive Care, Helsinki University Hospital, Helsinki, Finland
    Acta Anaesthesiol Scand 49:284-92. 2005
    ..We examined the relationship between motor reactions and physiological variables during skin incision in sevoflurane anaesthesia and hypothesized that nociception could be detected and graded by significant changes in these variables...
  59. ncbi The effect of contacting force on photoplethysmographic signals
    X F Teng
    Joint Research Center for Biomedical Engineering, Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong
    Physiol Meas 25:1323-35. 2004
    b>Photoplethysmography (PPG) has been used in oxygen saturation measurement, heart rate monitoring, and the assessment of peripheral circulation and large artery compliance...
  60. ncbi Non-invasive measurement of systolic blood pressure on the arm utilising photoplethysmography: development of the methodology
    C Laurent
    Department of Biomedical Engineering, Linkopings Universitet, Sweden
    Med Biol Eng Comput 43:131-5. 2005
    b>Photoplethysmography (PPG) can be used to measure systolic blood pressure at the brachial artery. With a specially designed probe, positioned in the most distal position beneath a pressure cuff on the upper arm, this is possible...
  61. ncbi Variations in arterial blood pressure and photoplethysmography during mechanical ventilation
    Giuseppe Natalini
    Department of Anesthesia, Intensive Care and Emergency, Poliambulanza Hospital, Brescí, Italy
    Anesth Analg 103:1182-8. 2006
    We analyzed ventilation-induced changes in arterial blood pressure and photoplethysmography from waveforms obtained by monitoring 57 patients in the operating room and intensive care unit...
  62. ncbi Noncontact simultaneous dual wavelength photoplethysmography: a further step toward noncontact pulse oximetry
    Kenneth Humphreys
    Department of Electronic Engineering, National University of Ireland, Maynooth, Maynooth Co, Kildare, Ireland
    Rev Sci Instrum 78:044304. 2007
    ....
  63. doi Arterial stiffness, endothelial function and microcirculatory reactivity in healthy young males
    C I Wright
    Unilever Food and Health Research Institute, Unilever R and D Vlaardingen, Vlaardingen, The Netherlands
    Clin Physiol Funct Imaging 28:299-306. 2008
    ..and responses of finger flux measured by laser Doppler fluxmetry (LDF); pulsatile finger volume measured by photoplethysmography (PPG); and palm skin temperature measured by infrared thermography (Tpalm) (i.e...
  64. ncbi Pulse transit time ratio as a potential marker for paediatric crural and brachial blood pressure index
    J Y A Foo
    J Hum Hypertens 21:415-7. 2007
  65. doi Finger photoplethysmogram pulse amplitude changes induced by flow-mediated dilation
    E Zahedi
    Biomedical Engineering Laboratory, School of Electrical Engineering, Sharif University of Technology, Tehran, Iran
    Physiol Meas 29:625-37. 2008
    ..001). The proposed technique using a finger photoplethysmogram can be applied in a rapid and non-invasive assessment of peripheral vascular functions as an alternative low-cost and less operator-dependent tool compared to ultrasound...
  66. ncbi Application of amplitude-based and slope-based algorithms to determine beat-to-beat finger arterial compliance during handgrip exercise
    R Raamat
    Department of Physiology, University of Tartu, Tartu, Estonia
    Med Eng Phys 30:67-74. 2008
    ..11). Even at P(transm) = 0, a variation of 13mmHg in the pulse pressure caused an 8% modulation in C(amplit) (p = 0.03). The slope-based estimate was less sensitive to pulse pressure changes...
  67. doi Bilateral transit time assessment of upper and lower limbs as a surrogate ankle brachial index marker
    Jong Yong Abdiel Foo
    Biomedical and Pharmaceutical Engineering Cluster, Nanyang Technological University, Research Techno Plaza, Singapore
    Angiology 59:283-9. 2008
    ..704). The findings herein suggest that pulse transit time ratio is a surrogate and accommodating ankle brachial index marker...
  68. ncbi A new method to estimate arterial blood pressure using photoplethysmographic signal
    In Cheol Jeong
    Dept of Biomed Eng, Yonsei Univ, Wonju, Kangwon, Korea
    Conf Proc IEEE Eng Med Biol Soc 1:4667-70. 2006
    ..When PPG signal is normalized by P and T, this PPG signal offers more accurate estimation of BP. This study could be able to provide a new BP measurement system that has not only convenience but also accuracy...
  69. ncbi Asymmetric time-dependent model for the dynamic finger arterial pressure-volume relationship
    Jaak Talts
    Department of Physiology, University of Tartu, Tartu, Estonia
    Med Biol Eng Comput 44:829-34. 2006
    ....
  70. doi Poor agreement between respiratory variations in pulse oximetry photoplethysmographic waveform amplitude and pulse pressure in intensive care unit patients
    Svein Aslak Landsverk
    Department of Anesthesiology, Ulleval University Hospital, Oslo, Norway
    Anesthesiology 109:849-55. 2008
    ..Based on knowledge of slow oscillation in skin blood flow, the authors hypothesized that the variability of DeltaPOP would be larger than that of DeltaPP when calculations were performed continuously over a long recording period...
  71. ncbi Pulse wave transit time for monitoring respiration rate
    A Johansson
    Department of Biomedical Engineering, Linkopings Universitet, Linkoping, Sweden
    Med Biol Eng Comput 44:471-8. 2006
    ..PTT can be derived from signals already present in most standard monitoring set-ups. The transit time technology thus has prospects to become an interesting alternative for respiration rate monitoring...
  72. ncbi Steal in hemodialysis patients depends on type of vascular access
    F van Hoek
    Department of Surgery, Máxima Medical Center MMC, Veldhoven, The Netherlands
    Eur J Vasc Endovasc Surg 32:710-7. 2006
    ..To study incidence and severity of steal phenomena in hemodialysis patients and to investigate possible methods for its detection...
  73. ncbi Assessment of surgical stress during general anaesthesia
    M Huiku
    Clinical Research, GE Healthcare Finland Oy, PO Box 900, FI 00031 GE, Helsinki, Finland
    Br J Anaesth 98:447-55. 2007
    ..No objective measures of the adequacy of analgesia exist. We aimed at developing a simple numerical measure of the level of surgical stress in an anaesthetized patient...
  74. ncbi Use of digital pressure measurements for the diagnosis of AV access-induced hand ischemia
    Andres Schanzer
    Department of Vascular Surgery, Brigham and Women s Hospital, Boston, MA 02115, USA
    Vasc Med 11:227-31. 2006
    ..Arterial pressure in the third finger ipsilateral to the AV access was measured by digital photoplethysmography. Basal digital pressure (BDP), digital to contralateral brachial index (DBI), and change in digital ..
  75. ncbi Automatic detection of left ventricular ejection time from a finger photoplethysmographic pulse oximetry waveform: comparison with Doppler aortic measurement
    Gregory S H Chan
    Biomedical Systems Laboratory, School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, 2052, Australia
    Physiol Meas 28:439-52. 2007
    ..More extensive investigation is necessary to evaluate the applicability of the present approach in clinical care monitoring...
  76. ncbi An optical fiber photoplethysmographic system for central nervous system tissue
    Justin P Phillips
    Anaesthetic Laboratory, Saint Bartholomew s Hospital, London, UK
    Conf Proc IEEE Eng Med Biol Soc 1:803-6. 2006
    ..The development and testing of a two-wavelength optical fiber reflectance photoplethysmography (PPG) system is described...
  77. ncbi Reflectance forehead pulse oximetry: effects of contact pressure during walking
    Russell P Dresher
    Dept of Biomed Eng, Worcester Polytech Inst, MA 01609, USA
    Conf Proc IEEE Eng Med Biol Soc 1:3529-32. 2006
    ..However, SpO2 and HR errors increased when insufficient contact pressure was applied. This information may be helpful in the design of a more robust pulse oximeter sensor for use in remote monitoring applications...
  78. ncbi Smart Vest: wearable multi-parameter remote physiological monitoring system
    P S Pandian
    Defence Bioengineering and Electromedical Laboratory DEBEL, Defence R and D Organization DRDO, CV Raman Nagar, Bangalore 560093, India
    Med Eng Phys 30:466-77. 2008
    ..The paper describes a prototype Smart Vest system used for remote monitoring of physiological parameters and the clinical validation of the data are also presented...
  79. ncbi Difference in pulse transit time between populations: a comparison between Caucasian and Chinese children in Australia
    J Y A Foo
    Biomedical Engineering Research Centre, Nanyang Technological University, 50 Nanyang Drive, Research Techno Plaza, 6th Storey, XFrontiers Block, 637553, Singapore
    J Med Eng Technol 32:162-6. 2008
    ..Hence, preliminary results suggest that locality or inclusion of pre-ejection period, which forms the major component of the PTT measurement, may contribute to this discrepancy...
  80. ncbi [Relationship of arterial wall parameters to cardiovascular risk factors and cardiovascular risk assessed by SCORE system]
    Milda Kovaite
    Center of Cardiology and Angiology, Santariskes Clinics of Vilnius University Hospital, Santariskiu 2, Vilnius, Lithuania
    Medicina (Kaunas) 43:529-41. 2007
    ....
  81. ncbi Comparison of heart rate variability signal features derived from electrocardiography and photoplethysmography in healthy individuals
    M Bolanos
    Dept of Electr and Comput Eng, Texas Univ, El Paso, TX, USA
    Conf Proc IEEE Eng Med Biol Soc 1:4289-94. 2006
    ....
  82. ncbi An evaluation of a PTT-based method for noninvasive and cuffless estimation of arterial blood pressure
    X F Teng
    Dept of Electron Eng, Chinese Univ of Hong Kong, Shatin, N T Hong Kong
    Conf Proc IEEE Eng Med Biol Soc 1:6049-52. 2006
    ..e., at 5 minutes after exercise (p=0.008 for systolic BP and p=0.03 for diastolic BP). At all other post exercise time spots there were no significant differences between BPs measured by Finometer and PTT-based device...
  83. ncbi A simple and efficient algorithm with a coarse to fine approach for arterial beat pulse detection
    Ronan Le Page
    Laboratoire d Optronique, Ecole Nationale Supérieure de Sciences Appliquées et de Technologie ENSSAT, 6 rue de Kérampont BP 80518 22305 Lannion, France
    Conf Proc IEEE Eng Med Biol Soc 2007:283-6. 2007
    ..Thanks to online available database, the performance of this algorithm can be compared to others and its ability to detect peaks is sufficient considering its low amount of calculation...
  84. ncbi Estimation of effects of visually-induced motion sickness using independent component analysis
    Makoto Abe
    Graduate School of Engineering, Tohoku University, 6 6 05 Aoba, Aramaki, Aoba ku, Sendai 980 8579, Japan
    Conf Proc IEEE Eng Med Biol Soc 2007:5501-4. 2007
    ..method for obtaining rho max with measurement of neither continuous blood pressure nor ECG but using finger photoplethysmography (PPG) only has been developed...
  85. ncbi Validation of a device to measure arterial pulse wave velocity by a photoplethysmographic method
    Stavros Loukogeorgakis
    Department of Morbid Anatomy and Histopathology, St Bartholomew s and the Royal London School of Medicine and Dentistry, Royal London Hospital, UK
    Physiol Meas 23:581-96. 2002
    ..pulsewave transit time and pulsewave velocity (a measure of arterial elasticity), based on the principle of photoplethysmography (PPG), and to compare transcutaneous values with those obtained by intra-arterial measurements...
  86. ncbi Effects of RF exposure of teenagers and adults by CDMA cellular phones
    Ki Chang Nam
    Department of Medical Engineering, Yonsei University College of Medicine, Seoul, Korea
    Bioelectromagnetics 27:509-14. 2006
    ..0026). Those resistances at 10 min after the terminated exposure returned to the resistances at rest regardless of the different groups of age and sex...
  87. ncbi Can respiratory-related variations in the optical plethysmograph be a surrogate for respiratory-related changes in arterial pressure?
    M J Harrison
    Eur J Anaesthesiol 25:252-3. 2008
  88. doi Are baroreflex events detected by invasive and non-invasive techniques coincident?
    Stephen M Smith
    Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
    Clin Physiol Funct Imaging 28:262-9. 2008
    ..Non-invasive, compared with intra-arterial estimates of BRS by sequence analysis are not influenced by coincidence of sequences if acceptance of sequences is based on the correlation coefficient criteria (>0.85)...
  89. ncbi Autonomic cardiovascular and respiratory control during prolonged spaceflights aboard the International Space Station
    Roman M Baevsky
    Institute of Biomedical Problems, Moscow, Russia
    J Appl Physiol 103:156-61. 2007
    ..Electrocardiography, photoplethysmography, and respiratory frequency (RF) were assessed in eight male cosmonauts (age 41-50 yr, body-mass index of 22-..
  90. ncbi Evaluation of blood pressure changes using vascular transit time
    Jong Yong Abdiel Foo
    Biomedical Engineering Research Centre, Nanyang Technological University, 50 Nanyang Drive, Research Techno Plaza, 6th Storey, XFrontiers Block, 637553, Singapore
    Physiol Meas 27:685-94. 2006
    ..In this study, photoplethysmography and phonocardiography were used to estimate BP changes via observed variations in delay transmission or ..
  91. ncbi Evaluation of oesophageal pulse oximetry in patients undergoing cardiothoracic surgery
    P A Kyriacou
    Medical Electronics and Physics, Department of Engineering, Queen Mary, University of London, London E1 NS, UK
    Anaesthesia 58:422-7. 2003
    ..The results suggest that the oesophagus may be used as an alternative monitoring site for pulse oximetry even in patients with compromised peripheral perfusion...
  92. ncbi Investigation of oesophageal photoplethysmographic signals and blood oxygen saturation measurements in cardiothoracic surgery patients
    P A Kyriacou
    Department of Engineering, Queen Mary, University of London, UK
    Physiol Meas 23:533-45. 2002
    ..It is concluded that oesophageal SPO2 monitoring may be of clinical value...
  93. ncbi Oxygen saturation determined using a novel wavelet ratio surface
    Paul S Addison
    CardioDigital Ltd, Elvingston Science Centre, Glasdmuir, EH33 1EH East Lothian, Scotland, UK
    Med Eng Phys 27:245-8. 2005
    ..The transform moduli of both red and infrared signals are used to derive a novel wavelet ratio surface. Projection of the pulse component onto this surface allows optimal derivation of oxygen saturation...
  94. ncbi Evidence of parasympathetic impairment in some patients with cardiac syndrome X
    G Gulli
    Department of Neurological Science and Vision, Section of Human Physiology, University of Verona, Strada Le Grazie 8, 37134, Verona, Italy
    Cardiovasc Res 52:208-16. 2001
    ..CONCLUSIONS: In about two thirds of the patients with SX, the pathophysiological mechanism causing the symptoms could be related to the reduced parasympathetic tone, rather than to an augmented sympathetic activity...
  95. ncbi Influence of contact forces on wrist photoplethysmography--prestudy for a wearable patient monitor
    D Rafolt
    Department of Biomedical Engineering and Physics, Vienna General Hospital, Medical University of Vienna
    Biomed Tech (Berl) 49:22-6. 2004
    ..The utilization of these results to improve pulse detection and reduce motion artefacts in a wearable wrist device is discussed...
  96. ncbi Cardiac output by Modelflow method from intra-arterial and fingertip pulse pressure profiles
    Marcel Azabji Kenfack
    Departement de Physiologie, Centre Medical Universitaire, 1 rue Michel Servet, CH 1211 Geneve 4, Switzerland
    Clin Sci (Lond) 106:365-9. 2004
    ....
  97. ncbi [Application of finger arterial compliance-blood pressure function for an evaluation of the sympathetically mediated vascular tone]
    Gohichi Tanaka
    Department of Psychology, School of Medicine, Sapporo Medical University, Chuo Ku, Sapporo 060 8556
    Shinrigaku Kenkyu 74:156-63. 2003
    ..CI 90 decreased significantly during the 22 degrees C condition. In conclusion, CI seemed more valid as an index of the finger arterial vascular tone through the removal of MBP influence...
  98. ncbi Examination of normalized pulse volume-blood volume relationship: toward a more valid estimation of the finger sympathetic tone
    Gohichi Tanaka
    Department of Psychology, School of Medicine, Sapporo Medical University, South 1 West 17, Chuo Ku, Sapporo 060 8556, Japan
    Int J Psychophysiol 48:293-306. 2003
    ..In conclusion, D(NB) is easily obtainable from the NPV-BV function and seems to be more specific and valid than NPV as an index of finger sympathetic tone, since it adjusts the mechanical effect of arterial distending pressure...
  99. ncbi Relationship between blood pressure and finger photoplethysmographic waveform during oxygen desaturation test: a model fitting approach
    J Weng
    Institut für Medizintechnik, Universitat zu Lubeck, Deutschland
    Biomed Tech (Berl) 47:233-4. 2002
    ..During about 30 minutes recording period, the SpO2 value was regulated down till about 70%. After preprocessing, singular value decomposition (SVD) algorithm was then used to get the best fit of the model parameters...
  100. ncbi The finger volume pulse and assessment of arterial properties
    Alberto Avolio
    J Hypertens 20:2341-3. 2002
  101. ncbi Digital signal processing methods for the evaluation of Blood Volume Pulse (BVP) waveform changes due to exercise
    Chao Li
    Digital Signal Processing Laboratory, Electrical and Computer Engineering Department, Florida International University, Miami, FL 33174, USA
    Biomed Sci Instrum 39:163-8. 2003
    ..Our study, involving observations from 10 subjects, ranks these three approaches according to their ability to reflect the changes in BVP due to exercise...

Research Grants68

  1. AUTONOMIC FUNCTION AND POSTTRANSPLANT QUALITY OF LIFE
    Donna Hathaway; Fiscal Year: 1999
    ..function will be evaluated by state-of-the-art technologies measuring 1) vasomotor function by infrared photoplethysmography which quantifies total pulse amplitude, postural adjustment ratio, and reflex vasoconstriction, 2) cardiac ..
  2. Effects of Early Abuse on Adult Intimate Relationships
    Cindy Meston; Fiscal Year: 2007
    ..The findings from this investigation will have implications for understanding both the psychological and physiological mechanisms that link CA with detrimental intimacy/relational factors in adulthood. ..
  3. Ginkgo Biloba: Antidepressant-Induced Sexual Dysfunction
    Cindy Meston; Fiscal Year: 2003
    ..If effective, GBE could play a significant adjunctive role in the treatment of clinical depression and other psychological disorders commonly treated with antidepressant medications. ..
  4. Effects of Early Abuse on Adult Intimate Relationships
    Cindy M Meston; Fiscal Year: 2010
    ..The findings from this investigation will have implications for understanding both the psychological and physiological mechanisms that link CA with detrimental intimacy/relational factors in adulthood. ..
  5. HRCA/HARVARD RESEARCH NURSING HOME
    Lewis Lipsitz; Fiscal Year: 2007
    ..Our institutional commitments, longstanding collaboration among investigators, track record of productivity, administrative structure, and proven leadership all assure that this program will achieve its stated goals. ..
  6. OCULOMOTOR SYSTEM AND BODY POSTURAL MECHANISMS
    Bernard Cohen; Fiscal Year: 2002
    ..e., to determine the organization of the velocity storage integrator, to model its function at a cellular level, and to study the role of velocity storage in spatial orientation. ..
  7. Nonlinear Dynamics of Frailty in Aging
    Lewis Lipsitz; Fiscal Year: 2007
    ....
  8. OCULOMOTOR SYSTEM AND BODY POSTURAL MECHANISMS
    Bernard Cohen; Fiscal Year: 2009
    ..abstract_text> ..
  9. HARVARD OLDER AMERICANS INDEPENDENCE CENTER
    Lewis Lipsitz; Fiscal Year: 2006
    ..abstract_text> ..
  10. CORE CENTER
    Bernard Cohen; Fiscal Year: 2007
    ..Through the last objective, we anticipate that the perspectives of the various groups will be broadened and that the Core Center will foster interdisciplinary studies that will enhance achievement of our common research goals. ..
  11. Translational Research in Aging Training Program
    Lewis Lipsitz; Fiscal Year: 2007
    ..abstract_text> ..
  12. OCULOMOTOR SYSTEM AND BODY POSTURAL MECHANISMS
    Bernard Cohen; Fiscal Year: 2006
    ..abstract_text> ..
  13. Autonomic Reactivity During Sleep Position Thermal Stress
    Rakesh Sahni; Fiscal Year: 2007
    ..Our long term goal is to develop screening tests for infants at risk for SIDS. ..
  14. VASCULAR FUNCTION BY MAGNETIC RESONANCE ANGIOGRAPHY
    HARRY SILBER; Fiscal Year: 2005
    ..abstract_text> ..
  15. NEONATAL CARBOHYDRATE INTAKE AND HEALTH AT 7-8 YEARS
    Rakesh Sahni; Fiscal Year: 2003
    ..Demonstration that significant changes in these variables are linked to early CHO intake would provide important evidence linking early nutritional practices and vulnerability to adult onset diseases. ..
  16. Arterial aging, brain perfusion & exercise: impact on brain structure & function.
    Rong Zhang; Fiscal Year: 2010
    ..Practically, the new findings are potentially important for developing new strategies to maintain cognitive vitality with age. ..
  17. INTEGRATIVE ASPECTS OF CARDIOVASCULAR FUNCTION
    Don Sheriff; Fiscal Year: 2000
    ..AIM V: The ability of the muscle chemoreflex to raise cardiac filling pressure will be assessed. ..
  18. INTEGRATIVE ASPECTS OF CARDIOVASCULAR FUNCTION
    Don Sheriff; Fiscal Year: 2005
    ....
  19. Decoupling of Principal Renal Autoregulatory Mechanisms
    Ki Chon; Fiscal Year: 2005
    ..By exercising this model, as described under Specific Aim (5), we plan to begin understanding the underlying reasons for the changes observed in autoregulation under pathological conditions. ..
  20. Decoupling Dynamics of the Autonomic Nervous System
    Ki Chon; Fiscal Year: 2005
    ..abstract_text> ..
  21. The Mental Health of Female Sexual Abuse Survivors
    Alessandra Rellini; Fiscal Year: 2005
    ..Sexual response will be manipulated through exposure to sexual videos and measured with a vaginal photoplethysmograph, self-report questionnaires. ..
  22. Multi Sensor Fusion for Remote Circulatory Monitoring
    HARUHIKO ASADA; Fiscal Year: 2004
    ..Several modalities, such as photoplethysmography and electrical bioimpedance, satisfy the criteria for truly wearable biosensors; they are unobtrusive, non-..
  23. Developing Predictive Methods for Sudden Cardiac Death
    Ki Chon; Fiscal Year: 2002
    ..It is intended that the algorithm will be applicable to other physiological systems and may become a widely accepted noninvasive clinical alternative. ..
  24. Mild Cognitive Impairment: Cerebrovascular Dysfunction and Exercise Training
    RONG contact ZHANG; Fiscal Year: 2010
    ..The new knowledge will have significant impact on prevention or treatment of AD. ..