Result: Group S had a proportion of pacemaker use and the heart beat recovery time after aortic unclamping, plasma creatine kinase isozyme (CK-MB) after surgery 6 hours, 24 hours and 48 hours, plasma troponin T after surgery 24 hours, the rate of using dobutamine during and after surgery were 25.0%, 83.2 ± 75.4 seconds; 55.8 ± 30.6ng / ml; 26.8 ± 16.8ng / ml and 6.5 ± 3.4ng / ml, 0.88 ± 0.89ng / ml, 32.1%, respectively lower than group P were 53.6%, 153.1 ± 127.7 seconds, 74.2 ± 35.0ng / ml, 42.1 ± 28.3ng / ml and 9.9 ± 6.4ng / ml, 1.54 ± 1.35ng / ml, 71.4%, respectively with p<0.05.