long QT syndrome

(redirected from Long QT syndrome type 3)

long QT syndrome

 
a combination of prolonged Q–T interval and torsades de pointes; it may be congenital or acquired, the latter usually being the result of drug administration.

long QT syndrome

an inherited cardiac disorder characterized by prolongation of the Q-T interval. The disorder is associated with ventricular tachycardia, cardiac arrhythmias, syncope, and sudden death. Syncopal episodes often occur during physical exercise in young, otherwise healthy persons. This syndrome may also be caused by a variety of drugs.

prolonged QT syndrome

, long QT syndrome, QT syndrome
A life-threatening syndrome marked by a prolonged Q-T interval with episodes of electrocardiographic torsades de pointes. This condition may be inherited or may be acquired as a result of drug administration. Inherited variants of the long QT syndrome include Romano-Ward syndrome and Lange-Nielsen syndrome. It is treated with beta-blocking drugs or an implanted cardioverter defibrillator (ICD).
References in periodicals archive ?
Many mutations in the SCN5A gene, which consists of 28 exons spanning ~80 kb on chromosome 3, are responsible for multiple arrhythmia disorders, including long QT syndrome type 3 (LQT3), idiopathic ventricular fibrillation (IVF), inherited cardiac conduction defects, and the Brugada syndrome.