June 7, 1985

Cardiomyopathy due to Chronic Tachycardias

Author Affiliations

Memorial Hospital Belleville. III

JAMA. 1985;253(21):3092. doi:10.1001/jama.1985.03350450064012

To the Editor.—  The recent article by Gillette et al1 regarding chronic supraventricular tachycardia as a curable cause of congestive cardiomyopathy reminded us of a similar case that we treated in 1974.

Report of a Case.—  A 13-year-old girl originally presented with sustained, asymptomatic, narrow-complex, atrial tachycardia. She was treated with quinidine, 200 mg every six hours. This resulted in intermittent control of her tachycardia. When she experienced a sinus rhythm she was found to have a Wolff-Parkinson-White type B syndrome. Propranolol hydrochloride, in increasing dosages up to 40 mg every six hours, resulted in control of her arrhythmia. However, the patient subsequently developed left ventricular dilatation. She was hospitalized on Jan 28, 1975. Propranolol treatment was discontinued, and digoxin and diuretics were added to her therapeutic regimen. The quinidine dosage was increased to 200 mg every four hours to control her supraventricular tachycardia. A cardiac catheterization revealed a