in 10 patients with supraventricular tachycardia who underwent an electrophysiological study the ectopic atrial origin of the tachycardia could be demonstrated by the intracavitary localization of the earliest depolarized point ( six cases in the right atrium and four cases in the left ) .
C0039240
supraventricular tachycardia
C0039234
ectopic atrial