The QT interval is a measurement on an electrocardiogram (ECG) that reflects the time it takes for the heart's electrical system to reset after each heartbeat. Variability in the QT interval can ...

by one-third of heart rhythm specialists and by nearly three-quarters of cardiologists. Even when the correct QTc value has been obtained, its diagnostic significance can be misinterpreted, ...

Women have a longer QT interval than men. Lower heart rates also result in a longer QT interval. A quick way to distinguish a prolonged QT interval is to examine if the T wave ends beyond the ...

Certain drugs, including hydroxyzine, can cause an irregular heart rhythm called QT prolongation. Taking other drugs that also affect heart rhythm increases this risk. Also known as long QT ...

Torsades de pointes (TdP) arrhythmia is a potentially life-threatening cardiac disorder that is often associated with a prolonged QT interval in ... guidelines. The heart is a complex organ ...

This is an accelerated junctional rhythm and P wave activity can be seen at the end of the QRS complexes in lead I and lead III. The QT is quite prolonged. This ECG was from a patient with genetic ...