Heart Rhythm Changes in Patients With Atrial Fibrillation After Cardiopulmonary Bypass: a Retrospective Analysis

"During the rewarming process, the study group received an injection of 0.15g amiodarone via the extracorporeal circulation oxygenator. After heart re-beating：~1. If the heart rate is ≥70 beats per minute without specific therapy and in sinus rhythm or atrioventricular junctional rhythm, no special treatment is required. If the heart rate \<70 beats/min, intravenous injection of isoproterenol 2 ug may be administered.~2. In cases where there is sinus rhythm or atrioventricular junctional rhythm with a heart rate \<70 beats/min and perfusion pressure \<60mmHg, intravenous injection of ephedrine 10 mg + aminophylline 0.15 g should be given.~3. For patients with atrioventricular junctional rhythm or sinus rhythm and a heart rate \<70 beats/min but perfusion pressure ≥60mmHg, intravenous injections of aminophylline (0.15g) and ephedrine (10 mg) .~4. In cases where there is atrial fibrillation (AF), and the heart rate is ≥70 beats/min without special treatment."