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 ...

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 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 ...

February 4, 2010 (Washington, DC) — A profoundly simple test that takes advantage of the brief heart-rate acceleration that occurs when one stands up, especially if it's done quickly, could ...

Aim To determine factors affecting the QT interval in athletes and find an improved means of QT correction (QTc) Method Data was gathered from the CAYA (Cardiovascular Assessment in Young Athletes) ...

SAN FRANCISCO, CA—Consuming a large quantity of grapefruit juice has effects on the QT interval in healthy adults similar to those seen with moxifloxacin, an antibiotic with known QT-prolonging ...

OBJECTIVE: To examine the effect of cisapride on the corrected QT (QTc) interval in infants over a 14-day period. STUDY DESIGN: A prospective cohort study of infants receiving cisapride (0.8 mg/kg per ...

Moxifloxacin (MX) is an 8-methoxyquinolone antimicrobial drug, which is often used as a positive control in thorough QT (TQT) studies. In the present study we established the population ...