A prolonged QT interval has a variety of causes and can be a very serious ECG finding, as it may lead to the potentially fatal arrhythmia polymorphic ventricular tachycardia (Torsades de Pointes).

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 ...

If the physician considers LQTS in the differential diagnosis, then the work-up includes an electrocardiogram to look at the QT interval; since only half of all patients will have QT prolongation ...

These ECG voltage attenuations are of extracardiac mechanism, and impact the amplitude of QRS complexes, P-waves, and T-waves, occasionally resulting also in shortening of the QRS complex and QT ...

However, the 12-lead ECG remains the universal initial diagnostic test in the evaluation of LQTS and is subject to miscalculation, misinterpretation and mishandling. This review discusses the ...

While everybody's heart has an absolute chronological age (as old as that person is), hearts also have a theoretical "biological" age that is based on how the heart functions. So, someone who is 50 ...

left axis deviation and conduction delays and findings suggestive or diagnostic of primary electrical diseases such as long QT syndrome and Wolff-Parkinson-White syndrome. The evaluation of abnormal ...

The Cardiospy analysis software provides ECG records of excellent quality ... The program performs rhythm analysis, ST, QT, AF, time and frequency based HRV, and it calculates HRT and uVTWA ...