Heart rate variability in human immunodeficiency virus-positive individuals.
BACKGROUND
Heart rate variability (HRV) is a marker of cardiac autonomic tone. Depressed HRV has been reported in patients with AIDS. We conducted this study to find out if HRV is depressed in human immunodeficiency virus (HIV)-positive individuals without AIDS.


METHODS
We studied prospectively HRV by spectral analysis of short-term electrocardiography (ECG) monitoring in 21 HIV-positives (33+/-11 years) and in 18 healthy volunteers (31+/-9 years). None of the HIV-positives had any clinical evidence of autonomic or cardiac dysfunction. Echocardiography was also performed in HIV-seropositives to rule out left ventricular (LV) systolic dysfunction. All these individuals did not have any evidence of AIDS.


RESULTS
Mean CD4+ lymphocyte count was 426+/-166/mm(3). The ejection fraction (EF%) of HIV patients was 62.4+/-6.4. The total power of HRV was reduced significantly in HIV-positive individuals (p<0.00001). All the components of HRV were reduced.


CONCLUSIONS
HRV is reduced in HIV-seropositive individuals in early stages of infection as well without any clinical evidence of autonomic dysfunction. This may serve as an early marker of future global sympatho-vagal imbalance.
Mittal
Chander Mohan
CM
Department of Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India.
Wig
Naveet
N
Mishra
Sundeep
S
Deepak
K K
KK
D000328:Adult; D001342:Autonomic Nervous System Diseases / Q000503:physiopathology; D015536:Down-Regulation; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006679:HIV Seropositivity / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D008297:Male