Knowlton, A A Paradoxical increase in heart rate before conversion to sinus rhythm in patients with recent-onset atrial fibrillation. [electronic resource] - The American journal of cardiology Apr 1990 - 930-2 p. digital Publication Type: Journal Article ISSN: 0002-9149 Standard No.: 10.1016/0002-9149(90)91443-a doi Subjects--Topical Terms: Atrial Fibrillation--drug therapyDigoxin--therapeutic useDouble-Blind MethodElectrocardiography, AmbulatoryHeart Rate--drug effectsHumans