The association of QT interval components with atrial fibrillation.

ABSTRACT:

Background

Although abnormalities of the QT interval are associated with atrial fibrillation (AF), it is unclear whether ventricular depolarization (QRS duration) or repolarization (JT interval) is a more important marker of AF risk.

Methods

This analysis included 4,181 (95% white; 59% women) participants from the Cardiovascular Health Study (CHS) who were free of baseline AF and major intraventricular delay. A linear scale was used to compute heart rate adjusted QT (QTa), QRS (QRS_a ), and JT (JT_a ) intervals. Prolonged QT_a , QRS_a , and JT_a were defined by values greater than the sex-specific 95th percentile for each measurement. AF events were ascertained during the annual study electrocardiograms and from hospitalizati

SUBMITTER: Patel N 

PROVIDER: S-EPMC5747556 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature