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).

Patients with a prolonged QT interval have a higher risk for developing ... This is present in only a small percentage of VT ECG tracings, but it is diagnostic of VT. Frequently, this is difficult ...

If VT is caused by long QT syndrome, the reduced flow of blood to ... Ventricular tachycardia is diagnosed with a device ...

Department of Molecular Pharmacology & Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota, USA Correspondence to Dr M J Ackerman, Long QT Syndrome ... 31 As such, the ECG must be examined ...

Long QT syndrome (LQTS) is the prototypic cardiac channelopathy underscored by profound genetic and phenotypic heterogeneity. In 1991, the first LQTS chromosome locus was identified and ...

left axis deviation and conduction delays and findings suggestive or diagnostic of primary electrical diseases such as long QT syndrome and Wolff-Parkinson-White syndrome. The evaluation of abnormal ...

Summary: Abnormalities in voltage-gated potassium channels have been shown to lead to prolonged action potentials ... A baseline electrocardiogram (ECG), personal and family history of syncope ...