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 ...

Despite paucity of information regarding the proper measurement and monitoring of the QT interval for many QT prolonging drugs, health care practitioners should have basic knowledge of what is ...

Females have a longer QT interval than males and lower heart rates result in a longer QT interval. Due to the heart rates effects, the corrected QT interval (QTc) is frequently used.

Objectives The short QT syndrome is a cardiac channelopathy characterised by accelerated repolarisation which manifests as a short QT interval on the ECG. The definition of a short QT interval is ...

A prolongation of QT interval increases the risk for coronary heart disease, ventricular arrhythmias, and sudden death in diabetic patients, after myocardial infarction, and in the elderly.

Methods: We used standard 12-lead electrocardiograms, K-shell X-ray fluorescence, and graphite furnace atomic absorption spectrometry to measure QT interval, bone lead, and blood lead levels, ...

Among opioids, methadone appears to carry the highest risk for inducing QT interval prolongation and arrhythmia even at low doses, according to a study published in the journal Medical Principles ...

In pregnancies with normal perfusion, the QTc interval was unaltered, but the QT interval-heart rate hysteresis lag was shorter and the QT interval-heart rate regression residual was higher ...

The previously described sudden deaths may thus have been caused by cardiac-rhythm abnormalities induced by QT-interval lengthening, ventricular tachyarrhythmias, or both.

Of the 12 participating institutions, 4 (2 academic and 2 community institutions) invited us to give a presentation on the QT interval at the same time the survey was conducted.