The QT interval is the time from the beginning of the QRS complex (ventricular depolarization) to the end of the T wave (ventricular repolarization). The normal QT interval is controversial and ...

The QT interval is a measurement on the ECG that represents how long it takes for the heart to recover after it contracts before it's ready to contract again.

The QT interval (indicated by the red lines) is identical before and after exercise, showing the “failure to shorten” that is typical of the LQT1 form of the disease.

Long QT interval is a condition that affects the heart’s electrical rhythm, which can lead to potentially life threatening arrhythmia. Behind the pumping action of the heart is an electrical ...

The investigators found that drinking grapefruit juice did indeed lengthen the QT interval. In the healthy volunteers, the absolute net prolongation of the rate-corrected QT interval was 14.0 msec, ...

AliveCor, a startup that makes at-home EKG devices, recently received 510(k) clearance for a feature that could help physicians detect if medications are affecting a patient’s QT interval.

In addition to 'Electrocardiogram QT interval', there may be other similar symptoms or signs that better match your side effect. These have also been listed below for your convenience.

The QT interval on an electrocardiogram signifies the time required for the heart to repolarize after depolarization. It has long been appreciated that a long QT interval predisposes patients to ...

At hospital admission, the 44-day-old infant had ventricular fibrillation (Panel A). After the restoration of sinus rhythm, the corrected QT interval was found to be prolonged (648 msec) (Panel B).

In 2011, the US Food and Drug Administration (FDA) issued a warning that higher doses of citalopram were associated with QT-interval lengthening. "Our findings support the FDA's warning, so that ...

Congenital long QT syndrome (LQTS) affects an estimated 1 in 2500 people and typically presents with syncope, seizures or sudden death. Whereas someone exhibiting marked prolongation of the QT ...

A large-scale genomic study has identified a new gene, known as NOS1AP , associated with abnormal QT intervals. The gene is a known regulator of neuronal nitric-oxide synthase but was not ...