The QT interval is the time from the beginning of the QRS complex, representing ventricular depolarization, to the end of the T wave, resulting from ventricular repolarization. The normal QT interval ...

What is the best way to estimate the QT interval on the ECG? What is the equation for QTc? A good way to estimate if the QT interval prolonged is by checking its relation to the R-R interval. If the ...

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 ...

ROTTERDAM, the NETHERLANDS — A new analysis of participants in a population-based cohort study suggests at least two ECGs might be useful to stratify individuals at risk for sudden cardiac death (SCD) ...

Objectives The purpose of this study was to determine whether shift work affects the heart-rate-adjusted QT interval (QTc) in electorcardiography (ECG) and the blood pressure of workers without overt ...