The evaluation of every electrocardiogram should also include an effort to interpret the QT
interval to assess the risk of malignant arrhythmias and sudden death associated with an …

This consensus guideline discusses the electrocardiographic phenomenon of beat-to-beat
QT interval variability (QTV) on surface electrocardiograms. The text covers measurement …

Long QT syndrome is characterized by prolongation of the corrected QT (QTc) interval on the
surface electrocardiogram and is associated with precipitation of torsade de pointes (TdP), a …

Background—In a recent cohort study, prolongation of the corrected QT interval (QTc) was
associated with an independent increased risk of sudden cardiac death (SCD). We …

Drug-induced ventricular tachyarrhythmias can be caused by cardiovascular drugs,
noncardiovascular drugs, and even nonprescription agents. They can result in arrhythmic …

Chronic heart failure is a clinical syndrome with multiple etiologies, associated with
significant morbidity and mortality. Cardiac arrhythmias, including ventricular …

The high incidence of sudden cardiac death in heart failure (HF) reflects electrophysiologic
changes in response to myocardial failure. We previously showed that short-term variability …

Torsade de pointes (TdP) is a stereotyped polymorphic ventricular tachycardia characterized
by a cyclic shifting of the QRS axis (twisting around the points of the isoelectric line) …

Apart from clinical symptoms the diagnosis and risk stratification in long-QT syndrome
(LQTS) is usually based on the surface electrocardiogram. Studies have indicated that not …

Abstract Approximately 30% to 70% of patients with cirrhosis have QT interval prolongation.
In patients without cirrhosis, QT prolongation is associated with an increased risk of …