A recent report from Japan describes a new nomogram of normal QT intervals at various heart rates. Based on automatic measurements of 24 h Holter electrocardiogram recordings in healthy individuals, ...

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 ...

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 ...

Department of Molecular Pharmacology & Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota, USA Correspondence to Dr M J Ackerman, Long QT Syndrome Clinic and the Mayo Clinic Windland Smith ...

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 ...

Copenhagen, Denmark - A team of Danish researchers have shown that certain patients with congestive heart failure (CHF) may benefit from the class III antiarrhythmic drug dofetilide (Tikosyn? - Pfizer ...

The QRS complex is irregular and coarse "fibrillatory waves" are present (see atrial fibrillation review by clicking below) indicating the presence of atrial fibrillation. There is quite a slow ...

What is Long QT Syndrome? Long QT syndrome is a heart condition that causes uncontrolled arrhythmias. It is the most common cause of unexplained deaths and affects approximately 1 in every 2000 ...

A simple electrocardiogram (ECG) can pinpoint hospitalized COVID-19 patients at high risk of death who might need intensive management. That's the finding of a study presented at EHRA 2022, a ...