Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12872-018-0878-1/MediaObjects/12872_2018_878_Fig4_HTML.png)
Echocardiogram in the short-axis view of aortic valve level showing severe pulmonary regurgitation. a: B-mode image; b: Color Doppler image. RV, right ventricle; RVOT, right ventricle outflow tract
Echocardiogram in the short-axis view of aortic valve level showing severe pulmonary regurgitation. a: B-mode image; b: Color Doppler image. RV, right ventricle; RVOT, right ventricle outflow tract