• Atrial fibrillation, coronary sinus rhythm, and slow atrial flutter developed in a patient with ECG findings of an acute inferior myocardial infarction. Hemodynamic measurements were suggestive of predominantly right ventricular involvement. A gated cardiac blood pool study demonstrated normal right and left ventricular wall motion with an enlarged, noncontracting right atrium. This led to the antemortem diagnosis of atrial fibrillation.
(Arch Intern Med 1984;144:193)