Persistent myocardial ischemia after termination of dipyridamole-induced ventricular tachycardia by intravenous aminophylline: Scintigraphic demonstration
Journal
Journal of the Formosan Medical Association
Journal Volume
99
Journal Issue
3
Pages
264-266
Date Issued
2000
Author(s)
Abstract
Ventricular tachycardia is a rare complication of dipyridamole stress testing. We present a case in which dipyridamole induced symptomatic ventricular tachycardia. The patient, a 41-year-old man with a history of chest discomfort on exertion for 1 year, underwent dipyridamole thallium imaging. Sustained ventricular tachycardia occurred 1 minute and 40 seconds after completion of the dipyridamole infusion. Intravenous aminophylline (125 mg) was given immediately and the tachycardia was terminated. Two minutes later, thallium-201 was injected and subsequent myocardial imaging showed reversible perfusion defects in the inferior wall, septum, and apex. Coronary angiography revealed three-vessel disease. This case discloses that reversible perfusion defects can still be demonstrated on thallium scan in spite of injection of aminophylline, an antagonist of dipyridamole, before thallium administration.
SDGs
Other Subjects
aminophylline; dipyridamole; thallium 201; adult; angiocardiography; article; cardiotoxicity; case report; drug induced disease; exercise test; heart muscle ischemia; heart ventricle tachycardia; human; male; scintigraphy; single photon emission computer tomography; Adult; Aminophylline; Dipyridamole; Humans; Male; Myocardial Ischemia; Tachycardia, Ventricular; Thallium Radioisotopes
Type
journal article