Author affiliation and address:
1.Department of Structural Heart Disease, Fuwai Central China Cardiovascular Hospital, Henan Provincial People´s Hospital, Central China Fuwai Hospital of Zhengzhou University, People´s Hospital of Zhengzhou University, Zhengzhou, Henan P.R.China
2.Department of Cardiovascular Ultrasound, Fuwai Central China Cardiovascular Hospital, Henan Provincial People´s Hospital, Central China Fuwai Hospital of Zhengzhou University, People´s Hospital of Zhengzhou University, Zhengzhou, Henan P.R.China
No 1 Fuwai Road Zhengdong New District, Zhengzhou, Henan 450000, P.R. China