[Management of postoperative arrhythmia after open heart surgery in complex congenital heart disease].

The incidence of postoperative arrhythmia was 35.2% in 264 cases with complex congenital heart diseases underwent open heart surgery between Feb, 1988 and Aug, 1989. Postoperative arrhythmia was closely related to preoperative hematocrit, cardiomegaly, prolonged aortic occlusion, ratio of RV/LV systolic pressure greater than 0.75, hypokalemia and low cardiac output syndrome. Infusion of colloid solution and both potassium and magnesium as well as successful surgery and the preventive administration of antiarrhythmic agent played an important role in the prevention and treatment of postoperative arrhythmia.