Victor A Convertino

Summary

Affiliation: Walter Reed Army Medical Center
Country: USA

Publications

  1. ncbi request reprint Hyperventilation in response to progressive reduction in central blood volume to near syncope
    Victor A Convertino
    U S Army Institute of Surgical Research, Fort Sam Houston, TX 78234 6315, USA
    Aviat Space Environ Med 80:1012-7. 2009
  2. ncbi request reprint Use of respiratory impedance in prehospital care of hypotensive patients associated with hemorrhage and trauma: a case series
    Victor A Convertino
    Tactical Combat Casualty Care Research Program, United States Army Institute of Surgical Research, Fort Sam Houston, Texas 78234, USA
    J Trauma Acute Care Surg 73:S54-9. 2012
  3. ncbi request reprint Blood pressure measurement for accurate assessment of patient status in emergency medical settings
    Victor A Convertino
    U S Army Institute of Surgical Research, 3698 Chambers Pass, Fort Sam Houston, TX 78234, USA
    Aviat Space Environ Med 83:614-9. 2012
  4. doi request reprint Autonomic mechanisms associated with heart rate and vasoconstrictor reserves
    Victor A Convertino
    US Army Institute of Surgical Research, 3698 Chambers Pass, Fort Sam Houston, TX 78234 6315, USA
    Clin Auton Res 22:123-30. 2012
  5. ncbi request reprint Validity of VO(2 max) in predicting blood volume: implications for the effect of fitness on aging
    V A Convertino
    United States Army Institute of Surgical Research, Fort Sam Houston, Texas 78234, USA
    Am J Physiol Regul Integr Comp Physiol 279:R1068-75. 2000
  6. ncbi request reprint Effects of inspiratory impedance on hemodynamic responses to a squat-stand test in human volunteers: implications for treatment of orthostatic hypotension
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, TX, 78234 6315, USA
    Eur J Appl Physiol 94:392-9. 2005
  7. ncbi request reprint Consequences of cardiovascular adaptation to spaceflight: implications for the use of pharmacological countermeasures
    Victor A Convertino
    U S Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6513, USA
    Gravit Space Biol Bull 18:59-69. 2005
  8. ncbi request reprint Arterial pulse pressure and its association with reduced stroke volume during progressive central hypovolemia
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6315, USA
    J Trauma 61:629-34. 2006
  9. ncbi request reprint Evaluation of cardiovascular risks of spaceflight does not support the NASA bioastronautics critical path roadmap
    Victor A Convertino
    U S Army Institute of Surgical Research, Fort Sam Houston, TX, USA
    Aviat Space Environ Med 76:869-76. 2005
  10. doi request reprint Physiological and medical monitoring for en route care of combat casualties
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, TX 78234 6315, USA
    J Trauma 64:S342-53. 2008

Collaborators

Detail Information

Publications73

  1. ncbi request reprint Hyperventilation in response to progressive reduction in central blood volume to near syncope
    Victor A Convertino
    U S Army Institute of Surgical Research, Fort Sam Houston, TX 78234 6315, USA
    Aviat Space Environ Med 80:1012-7. 2009
    ..We, therefore, tested the hypothesis that hyperventilation can be elicited by progressive reductions in central blood volume independent of metabolic stimuli...
  2. ncbi request reprint Use of respiratory impedance in prehospital care of hypotensive patients associated with hemorrhage and trauma: a case series
    Victor A Convertino
    Tactical Combat Casualty Care Research Program, United States Army Institute of Surgical Research, Fort Sam Houston, Texas 78234, USA
    J Trauma Acute Care Surg 73:S54-9. 2012
    ....
  3. ncbi request reprint Blood pressure measurement for accurate assessment of patient status in emergency medical settings
    Victor A Convertino
    U S Army Institute of Surgical Research, 3698 Chambers Pass, Fort Sam Houston, TX 78234, USA
    Aviat Space Environ Med 83:614-9. 2012
    ....
  4. doi request reprint Autonomic mechanisms associated with heart rate and vasoconstrictor reserves
    Victor A Convertino
    US Army Institute of Surgical Research, 3698 Chambers Pass, Fort Sam Houston, TX 78234 6315, USA
    Clin Auton Res 22:123-30. 2012
    ..Hemorrhage is accompanied by baroreflex-mediated tachycardia and vasoconstriction. The difference between baseline and maximum responses is defined as the heart rate (HR) and vasoconstrictor 'reserve'...
  5. ncbi request reprint Validity of VO(2 max) in predicting blood volume: implications for the effect of fitness on aging
    V A Convertino
    United States Army Institute of Surgical Research, Fort Sam Houston, Texas 78234, USA
    Am J Physiol Regul Integr Comp Physiol 279:R1068-75. 2000
    ..The results may have implication as to a mechanism by which aerobic fitness and activity may be protective against reduced BV associated with aging...
  6. ncbi request reprint Effects of inspiratory impedance on hemodynamic responses to a squat-stand test in human volunteers: implications for treatment of orthostatic hypotension
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, TX, 78234 6315, USA
    Eur J Appl Physiol 94:392-9. 2005
    ..This reduction in orthostatic symptoms with application of an ITD during the SST was associated with higher MAP, SV and Q. Our results demonstrate the potential application of an ITD as a countermeasure against orthostatic hypotension...
  7. ncbi request reprint Consequences of cardiovascular adaptation to spaceflight: implications for the use of pharmacological countermeasures
    Victor A Convertino
    U S Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6513, USA
    Gravit Space Biol Bull 18:59-69. 2005
    ....
  8. ncbi request reprint Arterial pulse pressure and its association with reduced stroke volume during progressive central hypovolemia
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6315, USA
    J Trauma 61:629-34. 2006
    ....
  9. ncbi request reprint Evaluation of cardiovascular risks of spaceflight does not support the NASA bioastronautics critical path roadmap
    Victor A Convertino
    U S Army Institute of Surgical Research, Fort Sam Houston, TX, USA
    Aviat Space Environ Med 76:869-76. 2005
    ..Occurrence of serious cardiac dysrhythmias and diminished cardiac and vascular function are the primary cardiovascular risks of spaceflight identified in the 2005 NASA Bioastronautics Critical Path Roadmap...
  10. doi request reprint Physiological and medical monitoring for en route care of combat casualties
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, TX 78234 6315, USA
    J Trauma 64:S342-53. 2008
    ....
  11. doi request reprint Status of cardiovascular issues related to space flight: Implications for future research directions
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, TX 78234, United States
    Respir Physiol Neurobiol 169:S34-7. 2009
    ..Future research should focus on these challenges...
  12. ncbi request reprint Inspiratory impedance effects on hemodynamic responses to orthostasis in normal subjects
    Victor A Convertino
    U S Army Institute of Surgical Research, 3400 Rawley E Chambers Avenue, Building 3611, Fort Sam Houston, TX 78234 6315, USA
    Aviat Space Environ Med 77:486-93. 2006
    ..Breathing through an impedance threshold device (ITD) might prove effective as a countermeasure against post-spaceflight orthostatic hypotension since it increased blood pressure (BP) and cardiac output in supine human subjects...
  13. ncbi request reprint Inspiratory resistance as a potential treatment for orthostatic intolerance and hemorrhagic shock
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, TX 78234 6315, USA
    Aviat Space Environ Med 76:319-25. 2005
    ..In this brief review, we present evidence which supports further consideration of using inspiratory resistance as a countermeasure against circulatory collapse associated with orthostatic instability and hemorrhagic shock...
  14. ncbi request reprint Effects of inspiratory impedance on the carotid-cardiac baroreflex response in humans
    Victor A Convertino
    US Army Institute of Surgical Research, 3400 Rawley E Chambers Avenue Building 3611, Fort Sam Houston TX 78234 6315, USA
    Clin Auton Res 14:240-8. 2004
    ..This resetting of the cardiac baroreflex may represent a mechanism that allows blood pressure to increase without a reflex-mediated reduction in HR...
  15. ncbi request reprint Value of orthostatic stress in maintaining functional status soon after myocardial infarction or cardiac artery bypass grafting
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, Tex 78234 6315, USA
    J Cardiovasc Nurs 18:124-30. 2003
    ..Intermittent exposure to orthostatic stress during the bed rest stage of hospital convalescence and recovery phase at home may obviate much of the deterioration in cardiovascular performance that follows myocardial infarction...
  16. ncbi request reprint Inspiratory resistance maintains arterial pressure during central hypovolemia: implications for treatment of patients with severe hemorrhage
    Victor A Convertino
    U S Army Institute of Surgical Research, Fort Sam Houston, TX, USA
    Crit Care Med 35:1145-52. 2007
    ....
  17. ncbi request reprint Evidence for altered alpha-adrenoreceptor responsiveness after a single bout of maximal exercise
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, TX 78234 6315, USA
    J Appl Physiol (1985) 95:192-8. 2003
    ..microg-1x kg-1x min-1, respectively). These results provide evidence that a single bout of maximal exercise increases alpha1-adrenoreceptor responsiveness within 24 h without affecting beta-cardiac and vascular adrenoreceptor responses...
  18. ncbi request reprint Mechanisms of blood pressure regulation that differ in men repeatedly exposed to high-G acceleration
    V A Convertino
    United States Army Institute of Surgical Research Library, 3400 Rawley E Chambers Ave, Bldg 3611, Fort Sam Houston, TX 78234, USA
    Am J Physiol Regul Integr Comp Physiol 280:R947-58. 2001
    ..2,310 +/- 96 ml, P = 0.06) volumes. These results support the hypothesis that exposure to repeated high G is associated with increased capacities of mechanisms that underlie blood pressure regulation...
  19. ncbi request reprint Baroreflex-mediated heart rate and vascular resistance responses 24 h after maximal exercise
    Victor A Convertino
    U S Army Institute of Surgical Research, Fort Sam Houston, TX 78234, USA
    Med Sci Sports Exerc 35:970-7. 2003
    ....
  20. ncbi request reprint Mechanisms of microgravity induced orthostatic intolerance: implications for effective countermeasures
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, TX 78234 USA
    J Gravit Physiol 9:1-13. 2002
    ....
  21. doi request reprint Optimizing the respiratory pump: harnessing inspiratory resistance to treat systemic hypotension
    Victor A Convertino
    United States Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6315, USA
    Respir Care 56:846-57. 2011
    ....
  22. ncbi request reprint Stroke volume and sympathetic responses to lower-body negative pressure reveal new insight into circulatory shock in humans
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam, 3400 Rawley E Chambers Avenue, Fort Sam Houston, TX 78234 6315, USA
    Auton Neurosci 111:127-34. 2004
    ..Sympathetic withdrawal rather than hypoadrenergic function may represent a fundamental mechanism for the development of circulatory shock...
  23. ncbi request reprint Blood volume response to physical activity and inactivity
    Victor A Convertino
    Remote Triage Research Laboratory, US Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6315, USA
    Am J Med Sci 334:72-9. 2007
    ..These relations have implications as to a mechanism by which physical activity and fitness may be protective against reduced blood volume and subsequent development of cardiovascular disease associated with aging...
  24. ncbi request reprint Identifying physiological measurements for medical monitoring: implications for autonomous health care in austere environments
    Victor A Convertino
    U S Army Institute of Surgical Research, Fort Sam Houston, TX 78234, USA
    J Gravit Physiol 14:P39-42. 2007
    ..3. Continuous capture of PP, ECG R-wave amplitude, indices of HRV, cardiac BRS, and/or muscle PO2 could improve the sensitivity of closed-loop resuscitation and oxygen delivery by providing earlier indications of clinical status...
  25. doi request reprint Breathing through an inspiratory threshold device improves stroke volume during central hypovolemia in humans
    Kathy L Ryan
    U S Army Institute of Surgical Research, 3400 Rawley E Chambers Avenue, Fort Sam Houston, TX 78234 6315, USA
    J Appl Physiol (1985) 104:1402-9. 2008
    ....
  26. doi request reprint Heart-rate complexity for prediction of prehospital lifesaving interventions in trauma patients
    Leopoldo C Cancio
    U S Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6315, USA
    J Trauma 65:813-9. 2008
    ..To improve our ability to forecast the need for prehospital lifesaving interventions (LSIs), we applied heart-rate complexity (HRC) analysis to the electrocardiogram (ECG) of patients en route to trauma centers...
  27. ncbi request reprint Inspiratory resistance, cerebral blood flow velocity, and symptoms of acute hypotension
    Caroline A Rickards
    U S Army Institute of Surgical Research, Fort Sam Houston, TX 78234, USA
    Aviat Space Environ Med 79:557-64. 2008
    ....
  28. ncbi request reprint Hypotension begins at 110 mm Hg: redefining "hypotension" with data
    Brian J Eastridge
    U S Army Institute for Surgical Research, Fort Sam Houston, Texas 78234 6315, USA
    J Trauma 63:291-7; discussion 297-9. 2007
    ..However, few data exist to support the rigid adherence to this arbitrary cutoff. We hypothesized that the physiologic hypoperfusion and mortality outcomes classically associated with hypotension were manifest at higher SBPs...
  29. ncbi request reprint Hemodynamics associated with breathing through an inspiratory impedance threshold device in human volunteers
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, TX, USA
    Crit Care Med 32:S381-6. 2004
    ..This study was performed to determine whether the acute increase in blood pressure induced by breathing through an ITD is associated with increased stroke volume and cardiac output...
  30. doi request reprint Is heart period variability associated with the administration of lifesaving interventions in individual prehospital trauma patients with normal standard vital signs?
    Caroline A Rickards
    Department of Health and Kinesiology, The University of Texas at San Antonio, TX, USA
    Crit Care Med 38:1666-73. 2010
    ..To determine whether heart period variability provides added value in identifying the need for lifesaving interventions (LSI) in individual trauma patients with normal standard vital signs upon early medical assessment...
  31. ncbi request reprint Inspiratory resistance delays the reporting of symptoms with central hypovolemia: association with cerebral blood flow
    Caroline A Rickards
    U S Army Institute of Surgical Research, 3400 Rawley E Chambers Ave, Fort Sam Houston, TX 78234 6315, USA
    Am J Physiol Regul Integr Comp Physiol 293:R243-50. 2007
    ....
  32. ncbi request reprint Prehospital loss of R-to-R interval complexity is associated with mortality in trauma patients
    Andriy I Batchinsky
    US Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6315, USA
    J Trauma 63:512-8. 2007
    ..To improve our ability to identify physiologic deterioration caused by critical injury, we applied nonlinear analysis to the R-to-R interval (RRI) of the electrocardiogram of prehospital trauma patients...
  33. ncbi request reprint R-wave amplitude in lead II of an electrocardiograph correlates with central hypovolemia in human beings
    John G McManus
    U S Army Institute of Surgical Research, 3400 Rawley E Chambers Avenue, Fort Sam Houston, TX 78234 6513
    Acad Emerg Med 13:1003-10. 2006
    ..In this investigation, we used graded central hypovolemia in adult volunteer subjects to test the hypothesis that moderate reductions in central blood volume increases R-wave amplitude in lead II of an ECG...
  34. ncbi request reprint A sensitive shock index for real-time patient assessment during simulated hemorrhage
    Christina Van Sickle
    U S Army Institute of Surgical Research, Fort Sam Houston, TX 78234 6315, USA
    Aviat Space Environ Med 84:907-12. 2013
    ....
  35. ncbi request reprint Effects of repeated Valsalva maneuver straining on cardiac and vasoconstrictive baroreflex responses
    Victor A Convertino
    U S Army Institute of Surgical Research, Ft Sam Houston, TX 78234 6315, USA
    Aviat Space Environ Med 74:212-9. 2003
    ..We hypothesized that repeated respiratory straining maneuvers (repeated SM) designed to elevate arterial BPs (arterial baroreceptor loading) would acutely increase baroreflex responses...
  36. ncbi request reprint Combat stress or hemorrhage? Evidence for a decision-assist algorithm for remote triage
    Caroline A Rickards
    U S Army Institute of Surgical Research, Fort Sam Houston, TX 78234, USA
    Aviat Space Environ Med 79:670-6. 2008
    ..The RRI HF and PP were used because of their ability to track central hypovolemia...
  37. doi request reprint Tracking central hypovolemia with ecg in humans: cautions for the use of heart period variability in patient monitoring
    Kathy L Ryan
    US Army Institute of Surgical Research, Fort Sam Houston, Texas, USA
    Shock 33:583-9. 2010
    ..HPV metrics, therefore, may not be useful in monitoring hemorrhagic injuries in individual patients...
  38. ncbi request reprint Cardiovascular consequences of weightlessness promote advances in clinical and trauma care
    William H Cooke
    U S Army Institute of Surgical Research, 3400 Rawley E Chambers Avenue, Bldg 3611, Fort Sam Houston, TX 78234 6513, USA
    Curr Pharm Biotechnol 6:285-97. 2005
    ..Remote medical monitoring will be essential for long-duration space missions and has the potential to save lives on the battlefield and in the civilian sector...
  39. doi request reprint Effects of dehydration on cerebrovascular control during standing after heavy resistance exercise
    Gilbert Moralez
    Laboratory for Applied Autonomic Neurophysiology, Department of Health and Kinesiology, University of Texas at San Antonio, San Antonio, TX, USA
    J Appl Physiol (1985) 112:1875-83. 2012
    ..During the prolonged phase of standing, increases in LF MAP and mean MCAv oscillations with DEH may help to maintain cerebral perfusion despite absolute MCAv remaining below the symptomatic threshold...
  40. doi request reprint Use of advanced machine-learning techniques for noninvasive monitoring of hemorrhage
    Victor A Convertino
    US Army Institute of Surgical Research, Tactical Combat Casualty Care Research Program, Fort Sam Houston, Texas 78234, USA
    J Trauma 71:S25-32. 2011
    ....
  41. doi request reprint Progressive reduction in central blood volume is not detected by sublingual capnography
    Kevin K Chung
    U S Army Institute of Surgical Research, Fort Sam Houston, Texas 78234, USA
    Shock 37:586-91. 2012
    ..1 ± 1.0 vs. 48.6 ± 1.5 mm Hg, P = 0.624). In a model of progressive central hypovolemia in humans, we did not detect metabolic derangements in the sublingual mucosa as measured by SLCO2...
  42. ncbi request reprint Manual vital signs reliably predict need for life-saving interventions in trauma patients
    John B Holcomb
    US Army Institute of Surgical Research, Fort Sam Houston, TX 78234, USA
    J Trauma 59:821-8; discussion 828-9. 2005
    ..In this study, we determined whether the addition of diagnostic equipment improved the predictive power of vital signs and scores obtained only by physical examination...
  43. ncbi request reprint Vented versus unvented chest seals for treatment of pneumothorax and prevention of tension pneumothorax in a swine model
    Bijan S Kheirabadi
    US Army Institute of Surgical Research, Fort Sam Houston, San Antonio, Texas, USA
    J Trauma Acute Care Surg 75:150-6. 2013
    ..Since no supporting data exist, we compared the efficacy of a preferred unvented with that of a vented CS in a novel swine model of pneumothorax (PTx)...
  44. pmc Arterial pressure oscillations are not associated with muscle sympathetic nerve activity in individuals exposed to central hypovolaemia
    Kathy L Ryan
    US Army Institute of Surgical Research, Fort Sam Houston, TX 78234, USA
    J Physiol 589:5311-22. 2011
    ..These results do not support the use of low frequency oscillations in arterial pressure as a non-invasive measure of sympathetic outflow for individual subjects during sympathetic activation...
  45. doi request reprint Limitations of end-tidal CO2 as an early indicator of central hypovolemia in humans
    John G McManus
    U S Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6315, USA
    Prehosp Emerg Care 12:199-205. 2008
    ..This study tested the hypothesis that pulmonary end-tidal CO(2) (PETCO(2)) tracks reductions in central blood volume in human volunteers exposed to progressive central hypovolemia...
  46. doi request reprint Changes in pulse character and mental status are late responses to central hypovolemia
    Kathy L Ryan
    The U S Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6315, USA
    Prehosp Emerg Care 12:192-8. 2008
    ....
  47. ncbi request reprint Cerebral blood flow response and its association with symptoms during orthostatic hypotension
    Caroline A Rickards
    U S Army Institute of Surgical Research, Fort Sam Houston, TX 78234, USA
    Aviat Space Environ Med 78:653-8. 2007
    ..We tested the hypothesis that decreasing mean arterial pressure (MAP) by > 30% is associated with compromised cerebral autoregulation and orthostatic symptoms during a squat-stand test (SST)...
  48. ncbi request reprint Lower body negative pressure as a model to study progression to acute hemorrhagic shock in humans
    William H Cooke
    US Army Institute of Surgical Research, Fort Sam Houston, TX 78234 6315, USA
    J Appl Physiol (1985) 96:1249-61. 2004
    ..Such experiments could lead to clinical algorithms that identify bleeding victims who will likely progress to hemorrhagic shock and require lifesaving intervention(s)...
  49. ncbi request reprint Radial pulse character relationships to systolic blood pressure and trauma outcomes
    John McManus
    The U S Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6315, USA
    Prehosp Emerg Care 9:423-8. 2005
    ..Objective. To test the hypothesis that palpable pulse characteristics in the radial artery would estimate systolic blood pressure (SBP) and predict outcome in trauma patients...
  50. ncbi request reprint Heart rate variability and spontaneous baroreflex sequences: implications for autonomic monitoring during hemorrhage
    William H Cooke
    U S Army Institute of Surgical Research, Fort Sam Houston, Texas, USA
    J Trauma 58:798-805. 2005
    ..The purpose of this study was twofold: (1) to track changes in autonomic function induced by a model of hemorrhage, and (2) to determine whether measures of autonomic function are reliable without strict control of breathing...
  51. ncbi request reprint Ectopy in trauma patients: cautions for use of heart period variability in medical monitoring
    Girish Sethuraman
    U S Army Institute of Surgical Research, Fort Sam Houston, TX 78234 6315, USA
    Aviat Space Environ Med 81:125-9. 2010
    ..We tested the hypothesis that ECGs from trauma patients exhibit a greater frequency of EBs than healthy human research subjects...
  52. doi request reprint Promoting early diagnosis of hemodynamic instability during simulated hemorrhage with the use of a real-time decision-assist algorithm
    Gary W Muniz
    US Army Institute of Surgical Research, Fort Sam Houston, Texas 78234 6315, USA
    J Trauma Acute Care Surg 75:S184-9. 2013
    ....
  53. ncbi request reprint Physiological evaluation of the U.S. Army one-handed tourniquet
    Joseph C Wenke
    U S Army Institute of Surgical Research, Fort Sam Houston, TX 78234 6315, USA
    Mil Med 170:776-81. 2005
    ..To provide a physiological assessment of the U.S. Army one-handed tourniquet (OHT)...
  54. ncbi request reprint Planning strategies for development of effective exercise and nutrition countermeasures for long-duration space flight
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, Texas 78234, USA
    Nutrition 18:880-8. 2002
    ..Future strategies for application of nutrition and exercise countermeasures for long-duration space missions must be directed to minimizing crew time and the impact on life-support resources...
  55. doi request reprint Characterization of common measures of heart period variability in healthy human subjects: implications for patient monitoring
    Caroline A Rickards
    Department of Health and Kinesiology, University of Texas at San Antonio, 78249, USA
    J Clin Monit Comput 24:61-70. 2010
    ....
  56. doi request reprint Validation of lower body negative pressure as an experimental model of hemorrhage
    Carmen Hinojosa-Laborde
    U S Army Institute of Surgical Research, Fort Sam Houston, Texas
    J Appl Physiol (1985) 116:406-15. 2014
    ....
  57. pmc Rat strains bred for low and high aerobic running capacity do not differ in their survival time to hemorrhage
    Harold G Klemcke
    U S Army Institute of Surgical Research, 3400 Rawley E Chambers Avenue, Fort Sam Houston, TX 78234, USA
    Exp Biol Med (Maywood) 234:1503-10. 2009
    ....
  58. pmc Heart Rate Variability during Simulated Hemorrhage with Lower Body Negative Pressure in High and Low Tolerant Subjects
    Carmen Hinojosa-Laborde
    US Army Institute of Surgical Research, Fort Sam Houston, TX, USA
    Front Physiol 2:85. 2011
    ..These results indicate that while a small number of HRV metrics can accurately distinguish between LT and HT subjects using group mean data, individual HRV values are poor indicators of tolerance to hypovolemia...
  59. doi request reprint Lightweight noninvasive trauma monitor for early indication of central hypovolemia and tissue acidosis: a review
    Babs R Soller
    Reflectance Medical, Inc, Westboro, Massachusetts, USA
    J Trauma Acute Care Surg 73:S106-11. 2012
    ..In this review, we expand the number of subjects and provide an overview of the relationship between the muscle and sublingual microcirculation in this model of compensated shock...
  60. doi request reprint Estimation of individual-specific progression to impending cardiovascular instability using arterial waveforms
    Victor A Convertino
    US Army Institute of Surgical Research, Fort Sam Houston, Texas
    J Appl Physiol (1985) 115:1196-202. 2013
    ..These findings foretell early identification of blood loss, anticipating hemodynamic instability, and timely application of life-saving interventions. ..
  61. ncbi request reprint The Bellagio Report: Cardiovascular risks of spaceflight: implications for the future of space travel
    Marian B Sides
    Aerospace Medical Association, Alexandria, VA, USA
    Aviat Space Environ Med 76:877-95. 2005
    ....
  62. ncbi request reprint Does the menstrual cycle influence the sensitivity of vagally mediated baroreflexes?
    William H Cooke
    Department of Biomedical Engineering, Michigan Technological University, Houghton 49931, USA
    Clin Sci (Lond) 102:639-44. 2002
    ..18). These findings are consistent with the notion that beat-to-beat vagal-cardiac regulation does not change over the course of the normal menstrual cycle...
  63. ncbi request reprint Noninvasively determined muscle oxygen saturation is an early indicator of central hypovolemia in humans
    Babs R Soller
    Dept of Anesthesiology, UMass Medical School, 55 Lake Ave North, Worcester, MA 01655, USA
    J Appl Physiol (1985) 104:475-81. 2008
    ..Spectroscopic determination of SmO2 is noninvasive and continuous, providing an early indication of impending cardiovascular collapse resulting from progressive reduction in central blood volume...
  64. ncbi request reprint Association between vasovagal hypotension and low sympathetic neural activity during presyncope
    William H Cooke
    Departments of Biomedical Engineering and Biological Sciences, Michigan Technological University, Houghton, MI 49931, USA
    Clin Auton Res 12:483-6. 2002
    ..The data from this case report question the notion that orthostatic hypotension occurs due to inadequate sympathetic neural activation during orthostatic stress in apparently normal, healthy subjects...
  65. ncbi request reprint Heart period variability in trauma patients may predict mortality and allow remote triage
    William H Cooke
    Department of Health and Kinesiology, The University of Texas at San Antonio, San Antonio, TX 78249, USA
    Aviat Space Environ Med 77:1107-12. 2006
    ..We tested the hypothesis that survival is associated with low relative HF/LF, and death is associated with high relative HF/LF...
  66. ncbi request reprint Human autonomic and cerebrovascular responses to inspiratory impedance
    William H Cooke
    Department of Health and Kinesiology, University of Texas at San Antonio W H C, San Antonio, Texas, and Department of Emergency Medicine, Minneapolis Medical Research Foundation and Hennepin County Medical Center, Minneapolis, Minnesota, USA
    J Trauma 60:1275-83. 2006
    ..We evaluated the influence of breathing through an inspiratory Impedance Threshold Device (ITD) on autonomic neural and cerebrovascular function...
  67. ncbi request reprint Bed rest affects ventricular and arterial elastances in monkeys: implications for humans
    Steven C Koenig
    Jewish Hospital Heart and Lung Institute, Department of Surgery, University of Louisville, Louisville, KY 40202, USA
    Aviat Space Environ Med 75:7-15. 2004
    ....
  68. doi request reprint Autonomic compensation to simulated hemorrhage monitored with heart period variability
    William H Cooke
    Department of Health and Kinesiology, University of Texas at San Antonio, San Antonio, TX 78249, USA
    Crit Care Med 36:1892-9. 2008
    ..To test the hypothesis that components of heart period variability track autonomic function during simulated hemorrhage in humans...
  69. ncbi request reprint Heart rate variability and its association with mortality in prehospital trauma patients
    William H Cooke
    Department of Health and Kinesiology, The University of Texas at San Antonio, San Antonio, Texas 78249, USA
    J Trauma 60:363-70; discussion 370. 2006
    ..The purpose of this study was to assess heart rate variability and its association with mortality in prehospital trauma patients...
  70. ncbi request reprint Stroke volume during orthostatic challenge: comparison of two non-invasive methods
    Donald F Doerr
    Technology Implementation Branch, NASA, Kennedy Space Center, FL, USA
    Aviat Space Environ Med 76:935-9. 2005
    ..Real time non-invasive determination of stroke volume (SV) is important to astronaut orthostatic testing. We compared simultaneous estimates of SV calculated from peripheral pulse waveforms with a more conventional non-invasive technique...
  71. ncbi request reprint A comparison of real-time performance of signal processing algorithms for minimum latency detection of hypovolemic States
    Emil Jovanov
    Dept of Electr and Comput Eng, Alabama Univ, Huntsville, AL, USA
    Conf Proc IEEE Eng Med Biol Soc 1:1674-7. 2006
    ..We also present a promising real-time wavelet algorithm for heart rate variability (HRV) processing in prehospital ambulatory monitoring applications...
  72. ncbi request reprint Imposed power of breathing associated with use of an impedance threshold device
    Ahamed H Idris
    Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA
    Respir Care 52:177-83. 2007
    ..To measure the imposed power of breathing (imposed work of breathing per minute) associated with spontaneous breathing through an active impedance threshold device and a sham impedance threshold device...
  73. ncbi request reprint Oxygen saturation determined from deep muscle, not thenar tissue, is an early indicator of central hypovolemia in humans
    Babs R Soller
    Department of Anesthesiology, University of Massachusetts Medical School, Worcester, MA, USA
    Crit Care Med 36:176-82. 2008
    ....