Long QT syndrome
* Not a rare disease
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.
Tests & Diagnosis
Long QT syndrome is diagnosed on the basis of electrocardiographic (EKG) findings, clinical findings such as congenital deafness or unexplained fainting, and family history of long QT syndrome or sudden cardiac death. Genetic testing is often performed in families in whom the diagnosis of long QT syndrome has been made or is suspected on clinical grounds.
Last updated: 10/4/2013