title: Tachycardia induced myocardial dysfunction. A reversible phenomenon?
abstract: Four patients with myocardial dysfunction related to tachycardia underwent electrophysiological studies, which showed a re-entrant supraventricular tachycardia using an accessory atrioventricular connexion. Serial assessment of left ventricular function by echocardiography before and after control of the tachycardia indicated a variable degree of reversibility. Endomyocardial biopsy in two patients detected non-specific histological changes. Because of the possible role of ischaemia in this condition effective control of prolonged tachycardia is needed to prevent deterioration of myocardial function.
mesh_terms: D000293:Adolescent; D002648:Child; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006331:Heart Diseases / Q000209:etiology* / Q000503:physiopathology; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D013610:Tachycardia / Q000150:complications* / Q000503:physiopathology