Abstract: Objective To analyze the risk factors of arrhythmias and its treatment following cardiac valve replacement undergoing Cardiopulmonary bypass. Methods The clinic date of 52 patients undergoing cardiac valve replacement which were studied retrospectively. The risk factors of arrhythmias were identified by using univariate andmultivariate logistic regression analysis. Results There were 30 patients who had arrhythmia, occurrence rate 57.7%, no death case. The high risk factors of arrhythmias were preoperative arrhythmias, electrolyte disturbance, NYHA function Class Ⅲ-Ⅳ, aortic-cross clamping time≥80 min after operation respectively. conclusion Active measures to avoid occurrence of these predictors or correct them should be taken so as to decrease postoperative occurrence rate and improve prognosis.

Key words: valvular heart disease, valve replacement, arrhythmias