1. Department of Cardiology Zhang Ye People's Hospital Affiliated to Hexi University Zhangye China
2. Medical College of Hexi University Zhangye China
3. Department of Cardiac Surgery Gansu Provincial Maternity and Child‐care Hospital No.143 North Qilihe Street Lanzhou Gansu 730050 China
4. Department of Cardiology, Zhongshan Hospital Fudan University, Shanghai Institute of Cardiovascular Disease Building 16, No.1609 Xietu Road Shanghai 200032 China