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BMC Cardiovasc Disord. 2012 Dec 23;12:124. doi: 10.1186/1471-2261-12-124.

QTc interval prolongation in HIV-infected patients: a case-control study by 24-hour Holter ECG recording.

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  • 1UO Geriatria, Ospedale di Montefiascone, Montefiascone 01027, Italy

Abstract

BACKGROUND:

Aim of the study was to assess QTc interval by a 24-hour ECG recording in a group of HIV-infected individuals with a basal prolonged QTc. The risk factors associated with QTc prolongation and the indices of cardiovascular autonomic control were also evaluated.

METHODS:

A case-control study was performed using as cases 32 HIV-infected patients with prolonged (>440 msec) QTc interval as assessed by Holter ECG, and as controls 64 HIV-infected subjects with normal QTc interval. Autonomic function was evaluated by heart rate variability analysis during 24-hour recording.

RESULTS:

Duration of HIV disease was significantly longer among cases than among controls (p=0.04). Waist/hip ratio was also higher among cases than among controls (p=0.05). Frequency domain analysis showed the absence of physiologic decrease of low frequency (LF) in the night period in both cases and controls. The LF night in cases showed a statistically significant reduction when compared with controls (p=0.007).

CONCLUSIONS:

In our study group, QTc interval prolongation was associated with a longer duration of HIV infection and with a greater waist/hip ratio. HIV patients with QTc interval prolongation and with a longer duration of HIV infection were more likely to have an impairment of parasympathetic and sympathetic cardiac component.

PMID:
23259665
[PubMed - indexed for MEDLINE]
PMCID:
PMC3543166
Free PMC Article
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