A patient was being worked up for frequent premature ventricular beats. He had been taking quinidine, and 2 days ago, he was admitted for an acute myocardial infarction

His QT interval has been elongating, and the nurse is not surprised to note which dysrhythmia?
a. Torsades de pointes
b. Supraventricular tachycardia
c. Sinus arrhythmia
d. Junctional tachycardia


ANS: A
QT elongation often is associated with torsades de pointes.
Sustained ventricular tachycardia could also occur, but not supraventricular tachycardia.
Sinus arrhythmia and junctional tachycardia are not anticipated with an elongated QT interval.

Nursing

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