1 Department of Medical Ultrasound, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China.
2 Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Shandong University, Jinan, China.
3 Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Weifang Medical University, Jinan, China.