中文摘要：

Correspondence to： Dr. ZHU Yao-bin, Department of Pediatric Heart Center, Beijing Anzhen Hospital, Capital Medical University, Beij ing 100029, China （Fax： 86-10-64456534. Email： zhuyaobin（uyeah. net）; Correspondence to： Dr. QIAO Chen-hui, Department of Cardiovascular Surgery, First Affiliated Hospital of ZhengzhotL University, Zhengzhou, Henan 450052, China （Email： qchenhui@hotmail.com）; Correspondence to： Dr. WANG Qiang, Department of Pediatric Heart Center, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China （Email： cardiacsurgeon@yeah.net）