Gang Huang1, Qiuyu Fu, Junbo Xu. 1. Department of Cardiology, The Second People's Hospital of Chengdu, Chengdu, Sichuan, China oigg1982@gmail.com Department of Cardiology, The Second People's Hospital of Chengdu, Chengdu, Sichuan and Department of Cardiology, People's Hospital of Gongyi, Zhengzhou, Henan, China Department of Cardiology, The Second People's Hospital of Chengdu, Chengdu, Sichuan, China.