A prolonged QT interval has a variety of causes and can be a very serious ECG finding, as it may lead to the potentially fatal arrhythmia polymorphic ventricular tachycardia (Torsades de Pointes). See ...

QT prolongation occurs when the heart muscle takes longer to contract and relax than usual. It can affect heart rhythms and lead to sudden cardiac arrest. The heart is a muscle that contracts and ...

During the past decade, a number of non-cardiovascular drugs have had their label revised or have been withdrawn from the market because of unexpected post-marketing reports of sudden cardiac death ...

One of the principal tasks of an oncologist is to determine whether to administer, reduce the dose, or hold chemotherapy on the basis of patient characteristics, organ function, and toxicities. These ...

Congenital long-QT syndrome is a disorder resulting in ventricular arrhythmias and sudden death. The most common forms of the long-QT syndrome, types 1 and 2, are caused by mutations in the ...

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 ...