185 T wave alternans in short QT Syndrome

Presence of Macrovolt T Wave Alternans and Short Coupled PVC Simultaneously in a Patient with Long QT Syndrome

This report presents a patient with macrovolt T wave alternans, PVC with R on T or a long-short sequence followed by torsades de pointes.

Malignant T-wave alternans.

A36-year-old woman was referred after her son had syncopal episodes associated with a markedly prolonged QT interval, which was treated with b-blockers and a subsequent pacemaker. The mother had a history of “seizures” as a child that had been treated with various medications, which did not appear to affect her events. She continued to have episodes 2 to 3 times a year, and witnesses said she w...

A Study to Determine if T Wave Alternans is a Marker of Therapeutic Efficacy in the Long QT Syndrome

T wave alternans (TWA), an alteration of the amplitude and morphology of the T wave that occurs every-other-beat, is emerging as an important new marker for identifying patients at risk of developing malignant ventricular arrhythmias. {Rosenbaum, Jackson, et. Al 1994} It is undergoing intense investigation in a number of areas where patients are thought to be at higher risk for Sudden Cardiac D...

Prevalence of Microvolt T-Wave Alternans in Patients With Long QT Syndrome and Its Association With Torsade de Pointes.

BACKGROUND Prevalence of microvolt T-wave alternans (TWA) and the strength of its association with torsade de pointes (TdP) history have not been fully investigated in patients with long QT syndrome (LQTS). METHODS AND RESULTS Twenty-four-hour continuous 12-lead ECGs were recorded in 10 healthy subjects (5 men; median age, 21.5 years) and 32 patients (13 men; median age, 13 years) with LQTS t...

Drug-induced T wave alternans.