[Xu Jian-feng; Qian Ju-ying; Xie Xin-xing; Sun Ai-jun; Zou Yun-zeng; Ge Jun-bo; Qian Juying] Fudan Univ, Zhongshan Hosp, Dept Cardiol, Shanghai 200032, Peoples R China; [Lin Li] Tongji Univ, Eastern Hosp, Dept Cardiol, Shanghai 200120, Peoples R China