As more consumer-facing devices add features to measure the heart’s electrical activity, companies are looking for new ways to turn this data into valuable health information. AliveCor, a startup that ...

AliveCor's at-home EKG device won FDA clearance to calculate a heart's QT interval, a measurement of how long it takes the ventricles to contract and relax. This is vital given that some drugs can ...

The maternal heart significantly adapts to the circulatory needs of pregnancy, but the effect of pregnancy on ventricular repolarization is poorly understood. The aim of this study was to quantify ...

Plausible explanations for differences in the prognostic impact of prolonged QTc interval among the studies are the occurrence of chance, bias and uncontrolled confounding variables. Chance could have ...