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Atrial fibrillation after intravenous dipyridamole for thallium imaging

Dudley J. Pennell and Peter J. Ell

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Abstract

Dipyridamole 0.56 mg/kg was administered intravenously for thallium tomography after myocardial infarction. Fast atrial fibrillation developed which failed to resolve with aminophylline. Sinus rhythm returned within 3 days. Myocardial tomography revealed apical infarction without reversible ischaemia. Atrial fibrillation after dipyridamole is rare and may be caused by direct electrophysiological effects on the atrial myocardium.

Key words  Dipyridamole - Atrial fibrillation - Thallium - Imaging

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