1. Department of Cardiology Guangdong Provincial People's Hospital, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences 106 Zhongshan 2nd Road Guangzhou 510080 China
2. Department of Cardiology The Eighth Affiliated Hospital of Sun Yat‐sen University Shenzhen China
3. Department of Echocardiography Guangdong Provincial People's Hospital, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences Guangzhou China
4. Department of Cardiology Guangdong General Hospital's Nanhai Hospital, The Second Hospital of Nanhai District Foshan City Foshan China