V K Yeragani

Summary

Publications

  1. pmc Psyche and soma: New insights into the connection
    Rahul Kumar
    M S Ramaiah Medical College and Hospital, Bangalore, India
    Indian J Psychiatry 52:S233-9. 2010
  2. ncbi request reprint Heart rate and QT interval variability: abnormal alpha-2 adrenergic function in patients with panic disorder
    Vikram Kumar Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
    Psychiatry Res 121:185-96. 2003
  3. ncbi request reprint Complex demodulation of cardiac interbeat intervals: increased cardiac sympathovagal interaction during human sexual activity
    Vikram K Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan, USA
    Arch Sex Behav 33:65-9. 2004
  4. ncbi request reprint Paroxetine decreases respiratory irregularity of linear and nonlinear measures of respiration in patients with panic disorder. A preliminary report
    Vikram Kumar Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, Mich, USA
    Neuropsychobiology 49:53-7. 2004
  5. ncbi request reprint Linear and nonlinear measures of blood pressure variability: increased chaos of blood pressure time series in patients with panic disorder
    Vikram K Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, Michigan, USA
    Depress Anxiety 19:85-95. 2004
  6. ncbi request reprint Effects of caffeine on linear and nonlinear measures of heart rate variability before and after exercise
    Vikram K Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan, USA
    Depress Anxiety 21:130-4. 2005
  7. ncbi request reprint Decreased coherence in higher frequency ranges (beta and gamma) between central and frontal EEG in patients with schizophrenia: A preliminary report
    Vikram Kumar Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
    Psychiatry Res 141:53-60. 2006
  8. ncbi request reprint Increased pulse-wave velocity in patients with anxiety: implications for autonomic dysfunction
    Vikram Kumar Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
    J Psychosom Res 61:25-31. 2006
  9. ncbi request reprint Relationship between beat-to-beat variability of RT-peak and RT-end intervals in normal controls, patients with anxiety, and patients with cardiovascular disease
    Vikram Kumar Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
    Ann Noninvasive Electrocardiol 12:203-9. 2007
  10. ncbi request reprint Exaggerated beat-to-beat R amplitude variability in patients with panic disorder after intravenous isoproterenol
    Vikram K Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan, USA
    Neuropsychobiology 55:213-8. 2007

Collaborators

Detail Information

Publications40

  1. pmc Psyche and soma: New insights into the connection
    Rahul Kumar
    M S Ramaiah Medical College and Hospital, Bangalore, India
    Indian J Psychiatry 52:S233-9. 2010
    ..This article reviews the relevant literature with an emphasis on Indian research...
  2. ncbi request reprint Heart rate and QT interval variability: abnormal alpha-2 adrenergic function in patients with panic disorder
    Vikram Kumar Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
    Psychiatry Res 121:185-96. 2003
    ..QTvi, a non-invasive indicator of cardiac repolarization lability, appears to be a useful tool to study cardiac sympathetic function...
  3. ncbi request reprint Complex demodulation of cardiac interbeat intervals: increased cardiac sympathovagal interaction during human sexual activity
    Vikram K Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan, USA
    Arch Sex Behav 33:65-9. 2004
    ..These findings are discussed in light of normal sexual physiology and the effect of sex on cardiac autonomic function in patients with heart disease, such as myocardial infarction...
  4. ncbi request reprint Paroxetine decreases respiratory irregularity of linear and nonlinear measures of respiration in patients with panic disorder. A preliminary report
    Vikram Kumar Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, Mich, USA
    Neuropsychobiology 49:53-7. 2004
    ..The implications of these findings on respiratory and cardiovascular function have been discussed...
  5. ncbi request reprint Linear and nonlinear measures of blood pressure variability: increased chaos of blood pressure time series in patients with panic disorder
    Vikram K Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, Michigan, USA
    Depress Anxiety 19:85-95. 2004
    ..This increase in BP variability may partly explain the increase in cardiovascular mortality in this group of patients...
  6. ncbi request reprint Effects of caffeine on linear and nonlinear measures of heart rate variability before and after exercise
    Vikram K Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan, USA
    Depress Anxiety 21:130-4. 2005
    ..These findings may have implications for patients with cardiac illness and anxiety, depression, and psychotic disorders who use beverages containing excessive caffeine...
  7. ncbi request reprint Decreased coherence in higher frequency ranges (beta and gamma) between central and frontal EEG in patients with schizophrenia: A preliminary report
    Vikram Kumar Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
    Psychiatry Res 141:53-60. 2006
    ..These results have been discussed further in relation to wake and sleep stages...
  8. ncbi request reprint Increased pulse-wave velocity in patients with anxiety: implications for autonomic dysfunction
    Vikram Kumar Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
    J Psychosom Res 61:25-31. 2006
    ..These findings suggest an important association between decreased vagal and increased sympathetic function, and decreased arterial compliance and possible atherosclerotic changes and increased BP in patients with anxiety...
  9. ncbi request reprint Relationship between beat-to-beat variability of RT-peak and RT-end intervals in normal controls, patients with anxiety, and patients with cardiovascular disease
    Vikram Kumar Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
    Ann Noninvasive Electrocardiol 12:203-9. 2007
    ....
  10. ncbi request reprint Exaggerated beat-to-beat R amplitude variability in patients with panic disorder after intravenous isoproterenol
    Vikram K Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan, USA
    Neuropsychobiology 55:213-8. 2007
    ..Anxiety symptoms are associated with a marked increase in sudden cardiac death, suggesting an abnormality in cardiac autonomic function. Our previous studies show a relationship between R amplitude variability and sympathetic function...
  11. ncbi request reprint Exaggerated differences in pulse wave velocity between left and right sides among patients with anxiety disorders and cardiovascular disease
    Vikram Kumar Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan, USA
    Psychosom Med 69:717-22. 2007
    ..Decreased vagal function is associated with vascular dysfunction and hypertension...
  12. ncbi request reprint Effect of nortriptyline and paroxetine on measures of chaos of heart rate time series in patients with panic disorder
    Vikram Kumar Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, MI, USA
    J Psychosom Res 55:507-13. 2003
    ..These results suggest that paroxetine appears to be safer in regards to cardiovascular effects compared to nortriptyline in this group of patients...
  13. ncbi request reprint Heart period and QT variability, hostility, and type-A behavior in normal controls and patients with panic disorder
    V K Yeragani
    Wayne State University School of Medicine, Detroit, MI, USA
    J Psychosom Res 49:401-7. 2000
    ..The aim of this study was to investigate the relationship between the measures of hostility and type-A behavior, and heart period (HP) and QT variability in normal controls and patients with panic disorder...
  14. ncbi request reprint Heart rate and QT variability in children with anxiety disorders: a preliminary report
    V K Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, Michigan, USA
    Depress Anxiety 13:72-7. 2001
    ....
  15. ncbi request reprint Nonlinear measures of heart period variability: decreased measures of symbolic dynamics in patients with panic disorder
    V K Yeragani
    Wayne State University School of Medicine, Detroit, Michigan, USA
    Depress Anxiety 12:67-77. 2000
    ....
  16. ncbi request reprint Increased QT variability in patients with panic disorder and depression
    V K Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, MI 48202, USA
    Psychiatry Res 93:225-35. 2000
    ....
  17. ncbi request reprint Heart rate time series: decreased chaos after intravenous lactate and increased non-linearity after isoproterenol in normal subjects
    Vikram Kumar Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, MI, USA
    Psychiatry Res 109:81-92. 2002
    ..These findings may throw new light on the association of anxiety and significant cardiovascular events...
  18. ncbi request reprint Effect of posture and isoproterenol on beat-to-beat heart rate and QT variability
    V K Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, Michigan, USA
    Neuropsychobiology 41:113-23. 2000
    ..In this investigation, we sought to test the hypothesis that beat-to-beat fluctuations in QT intervals are mediated by sympathetic activity in normal subjects using postural challenge and isoproterenol infusions...
  19. ncbi request reprint Twenty-four-hour QT interval variability: increased QT variability during sleep in patients with panic disorder
    Vikram Kumar Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, Mich, USA
    Neuropsychobiology 46:1-6. 2002
    ..We speculate that these effects may relate to a relative increase in cardiac sympathetic activity in patients with panic disorder, and may contribute to the increased risk for cardiac mortality in patients with anxiety...
  20. ncbi request reprint Effects of paroxetine on heart period variability in patients with panic disorder: a study of holter ECG records
    V K Yeragani
    Department of Psychiatry, Veterans Affairs Medical Center, Dayton, Ohio, USA
    Neuropsychobiology 40:124-8. 1999
    ..The decrease in LF and HF powers, and sleep FD is likely due to the antimuscarinic effect of paroxetine. The decrease in day-time LF power may also be due to a decrease in relative cardiac sympathetic activity after paroxetine treatment...
  21. ncbi request reprint Nonlinear measures of respiration: respiratory irregularity and increased chaos of respiration in patients with panic disorder
    Vikram Kumar Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, Mich, USA
    Neuropsychobiology 46:111-20. 2002
    ..In this study, we used these measures of respiration to compare normal controls (n = 18) and patients with panic disorder (n = 22) in addition to the traditional time domain measures of respiratory rate and tidal volume...
  22. ncbi request reprint Major depression with ischemic heart disease: effects of paroxetine and nortriptyline on measures of nonlinearity and chaos of heart rate
    Vikram K Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Mich, USA
    Neuropsychobiology 46:125-35. 2002
    ..As depression is associated with a strong risk factor for cardiovascular mortality, one should be careful about using any drug that adversely affects cardiac vagal function...
  23. ncbi request reprint Significant difference in beat-to-beat QT interval variability among different leads
    Vikram Kumar Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, Michigan, USA
    Heart Dis 4:344-8. 2002
    ..These findings should be evaluated in relation to the issue of local versus global cardiac repolarization of ventricular myocardium...
  24. ncbi request reprint Nonlinear measures of QT interval series: novel indices of cardiac repolarization lability: MEDqthr and LLEqthr
    Vikram Kumar Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, MI, USA
    Psychiatry Res 117:177-90. 2003
    ..These findings may also help to explain the higher incidence of cardiovascular mortality in patients with anxiety and depressive disorders...
  25. ncbi request reprint Approximate entropy of symptoms of mood: an effective technique to quantify regularity of mood
    Vikram K Yeragani
    Department of Psychiatry, Wayne State University School of Medicine, Detroit, MI, USA
    Bipolar Disord 5:279-86. 2003
    ..In this study, we investigated regularity of mood using APEN (Approximate Entropy) on daily subjective ratings using a Visual Analog Scale with 11 items pertaining to mood...
  26. ncbi request reprint Nonlinear measures of heart rate time series: influence of posture and controlled breathing
    R K Radhakrishna
    Department of ECE, Indian Institute of Science, Bangalore, India
    Auton Neurosci 83:148-58. 2000
    ..An improvement in predictability during controlled breathing appears to be due to the introduction of a periodic component...
  27. ncbi request reprint Effect of imipramine on linear and nonlinear measures of heart rate variability in children
    K Srinivasan
    Department of Psychiatry, St John s Medical College Hospital, Sarjapur Road, Bangalore 560034, India
    Pediatr Cardiol 25:20-5. 2004
    ..These findings are discussed in relation to the cardiovascular side effects of TCAs...
  28. ncbi request reprint Effect of age on diurnal changes of 24-hour QT interval variability
    V K Yeragani
    Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan 48207, USA
    Pediatr Cardiol 26:39-44. 2005
    ..We speculate that these effects may relate to changes in cardiac autonomic function and may contribute to the well-known diurnal variation in the incidence of ventricular arrhythmias...
  29. ncbi request reprint Beta-receptor responsiveness after desipramine treatment
    R Pohl
    Wayne State University, Detroit, MI
    Psychopharmacology (Berl) 110:37-44. 1993
    ..These findings suggest a decrease in the functional response of beta 1, but not beta 2, receptors after treatment with desipramine...
  30. ncbi request reprint Daily exercise reduces measures of heart rate and blood pressure variability in hypertensive rats
    S E DiCarlo
    Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA
    Clin Exp Hypertens 24:221-34. 2002
    ..These data demonstrate that daily exercise reduces sympathetic activity and possibly increases cardiac reserve in hypertensive animals...
  31. ncbi request reprint Thyroid hormone levels in panic disorder
    V K Yeragani
    Department of Psychiatry, Wayne State University, School of Medicine, Detroit, MI
    Can J Psychiatry 32:467-9. 1987
    ..55, p value less than 0.05; T4: 3.15, p value less than 0.01; T7: 2.55, p value less than 0.05)...
  32. ncbi request reprint Polydipsia and hyponatremia induced by multiple neuroleptics but not molindone
    E Glusac
    Wayne State University, Detroit, Michigan
    Can J Psychiatry 35:268-9. 1990
    ..A 37 year old patient with chronic schizophrenia developed polydipsia and hyponatremia induced by several neuroleptics. We treated the patient successfully with molindone. The etiology of polydipsia with hyponatremia is discussed...
  33. ncbi request reprint Decreased chaos and increased nonlinearity of heart rate time series in patients with panic disorder
    R K Rao
    Department of ECE, Indian Institute of Science, Bangalore
    Auton Neurosci 88:99-108. 2001
    ..These findings may further explain the reported higher incidence of cardiovascular mortality in patients with anxiety disorders...