Fig. 3
The air-filled balloon of the balloon wedge-pressure end-hole catheter visualized as a signal void passing through the right heart, pulmonary artery and finally to the wedge position under CMR visualization. Here, the balloon is seen in the a right atrium, b right ventricle, c right ventricular outflow tract, d main pulmonary artery, e right branch pulmonary artery approaching a wedge position, f wedge position