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Int J Sports Med 2012; 33(04): 320-324
DOI: 10.1055/s-0031-1297954
Clinical Sciences
© Georg Thieme Verlag KG Stuttgart · New York

Autonomic Modulation Following Exercise is Impaired in HIV Patients

J. Borges
1   Oswaldo Cruz Institute, Laboratory of Cardiovascular Investigation, Rio de Janeiro, Brazil
,
P. Soares
2   Fluminense Federal University, Department of Physiology and Pharmacology, Rio de Janeiro, Brazil
,
P. Farinatti
3   Rio de Janeiro State University, School of Physical Education, Rio de Janeiro, Brazil
› Author Affiliations
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Publication History



accepted after revision 07 November 2011

Publication Date:
19 January 2012 (online)

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Abstract

The autonomic modulation in HIV patients undergoing highly active antiretroviral therapy (HAART) was investigated. The heart rate variability (HRV) was assessed in 13 HIV patients (43±2 years) and 10 healthy controls (31±5 years) at rest, during exercise, and recovery. All time (standard deviation of NN intervals, SDNN; root mean of squared sum of successive differences, rMSSD; relative number of pairs of adjacent RR intervals differing more than 50 ms, pNN50) and frequency (Low Frequency, LF; High Frequency, HF) HRV components were lower in HIV patients at rest [SDNN (HIV: 44.2±3.9 ms vs. Control: 65.5±9.8 ms; P=0.04); rMSSD (HIV: 27.2±3.6 ms vs. Control: 49.3±8.3 ms; P=0.02); pNN50 (HIV: 8.8±2.9% vs. Control: 26.5±7.0%; P=0.02); LF (HIV: 502.4±80.5 ms2 vs. Control: 1302.8±446.4 ms2; P=0.04); HF (HIV: 296.4 ± 62.3 ms2 vs. Control: 986.3±280.6 ms2; P=0.01)] and post-exercise [SDNN (HIV: 32.3±3.5 ms vs. Control: 55.8±5.9 ms; P=0.002); rMSSD (HIV: 17.4±3.1 ms vs. Control: 36.6±4.6 ms; P=0.002); pNN50 (HIV: 2.9±1.2% vs. Control: 14.7±3.4%; P=0.001); LF (HIV: 404.9±102.6 ms2 vs. Control: 910.1±214.2 ms2; P=0.03); HF (HIV: 147.6 ± 40.1 ms vs. Control: 554.5±135.0 ms2; P=0.004)]. No between-group differences were found during exercise (P>0.05 for all comparisons). In conclusion, HIV patients showed impaired autonomic modulation, with reduced parasympathetic activity at rest and during post-exercise recovery.

Key words

AIDS - autonomic dysfunction - heart rate variability - autonomic nervous system
 

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