10Borowiki A ,Raji MR , Eichstaedt HC, et al. Myocardial protection by pressure-and volume-controlled continous hypothermic coronary perfusion in combina tion with esmolol and nitroglycerine for correction of congenital heart defects in pediatric risk patients[J]. Eur J Cardio-thorac Surg, 1998, 14(3):243-249.