Presence of Macrovolt T Wave Alternans and Short Coupled PVC Simultaneously in a Patient with Long QT Syndrome
نویسندگان
چکیده
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.
منابع مشابه
Macrovolt T-wave alternans and polymorphic ventricular tachycardia.
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A 23 year old woman with idiopathic long QT syndrome had repeated syncopal attacks associated with torsades de pointes. T wave alternans (TWA) was recorded and the QT interval was abnormally prolonged during treadmill exercise test. Monophasic action potential (MAP) alternans also appeared after an abrupt shortening of the cycle length in electrophysiological study. After intravenous administra...
متن کاملSELF ASSESSMENT ANSWERS An unusual electrocardiographic abnormality
Q1: What is shown in fig 1 (see p 539), and what is its significance? Figure 1 shows a prolonged QT interval (corrected QT 520 milliseconds) and macroscopic T wave alternans. T wave alternans is defined as a beat to beat variation in the amplitude or polarity of the T wave. Macroscopic T wave alternans is a predictor of malignant ventricular arrhythmias. Microvolt T wave alternans is a validate...
متن کاملSELF ASSESSMENT ANSWERS An unusual electrocardiographic abnormality
Q1: What is shown in fig 1 (see p 539), and what is its significance? Figure 1 shows a prolonged QT interval (corrected QT 520 milliseconds) and macroscopic T wave alternans. T wave alternans is defined as a beat to beat variation in the amplitude or polarity of the T wave. Macroscopic T wave alternans is a predictor of malignant ventricular arrhythmias. Microvolt T wave alternans is a validate...
متن کاملSELF ASSESSMENT ANSWERS An unusual electrocardiographic abnormality
Q1: What is shown in fig 1 (see p 539), and what is its significance? Figure 1 shows a prolonged QT interval (corrected QT 520 milliseconds) and macroscopic T wave alternans. T wave alternans is defined as a beat to beat variation in the amplitude or polarity of the T wave. Macroscopic T wave alternans is a predictor of malignant ventricular arrhythmias. Microvolt T wave alternans is a validate...
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