T-wave alternans in long QT syndrome
نویسندگان
چکیده
منابع مشابه
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...
متن کاملPrevalence 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...
متن کاملPresence 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.
متن کاملCellular and ionic basis for T-wave alternans under long-QT conditions.
BACKGROUND T-wave alternans (TWA), an ECG phenomenon characterized by beat-to-beat alternation of the morphology, amplitude, and/or polarity of the T wave, is commonly observed in the acquired and congenital long-QT syndromes (LQTS). This study examines the cellular and ionic basis for TWA induced by rapid pacing under conditions mimicking the LQT3 form of the congenital LQTS in an arterially p...
متن کاملMalignant 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...
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ژورنال
عنوان ژورنال: Annals of Pediatric Cardiology
سال: 2018
ISSN: 0974-2069
DOI: 10.4103/apc.apc_112_17