Associations between QT interval subcomponents, HIV serostatus, and inflammation

Area of Science:

• Cardiology
• Infectious Disease
• Electrophysiology

Background:

• The QT interval reflects ventricular electrical activity, crucial for understanding arrhythmias.
• HIV serostatus and inflammation are potential risk factors influencing cardiac repolarization.

Purpose of the Study:

• To investigate the association between HIV serostatus and specific QT interval subcomponents.
• To explore the role of inflammatory biomarkers, like IL-6, in these associations.

Main Methods:

• 12-lead ECGs analyzed in HIV-infected (HIV+) and HIV-uninfected (HIV-) men.
• Multivariable linear regressions used to assess QT subcomponent intervals and covariates.
• Serum IL-6 concentrations and other risk factors were included in the analysis.

Main Results:

• HIV+ men showed significantly longer T-onset to T-peak and T-peak to T-end durations.
• Inflammation, particularly higher IL-6 levels, attenuated the HIV-associated repolarization changes.
• Higher IL-6 was independently associated with longer T-onset to T-peak intervals.

Conclusions:

• HIV seropositivity, combined with inflammation, is associated with prolonged ventricular repolarization.
• These findings suggest mechanisms for increased arrhythmia risk in men living with HIV.
• Understanding these electrophysiological changes is vital for managing cardiovascular health in HIV patients.