1. Department of Cardiology, Harbin Medical University Fourth Hospital, Harbin 150086, China
2. Department of Critical Care Medicine, Affiliated Qiqihar Hospital, Southern Medical University (The First Hospital of Qiqihar), Qiqihar 161005, China
3. Department of Anesthesiology, Affiliated Hospital of Qingdao University, Qingdao 266000, China
4. Department of Ultrasonic Medicine, Affiliated Qiqihar Hospital, Southern Medical University (The First Hospital of Qiqihar), Qiqihar 161005, China
5. Department of Cardiology, Central Hospital of Dalian, Dalian 116003, China