WEI-TIEN CHANGLin, Lung-ChunLung-ChunLinRUOH-FANG YENHuang P.-J.2020-12-242020-12-2420000929-6646https://scholars.lib.ntu.edu.tw/handle/123456789/532054Ventricular 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]SDG3aminophylline; 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 Radioisotopesjournal article108209632-s2.0-0034022592