Figure 1

Using autologous pericardial patch to enlarge the pulmonary artery and the right ventricular outflow tract. Left figure shows the integrity of original pulmonary valve annular (held by a silk thread, as the first orifice). The sucker for right heart (right figure, white color) was inserted into the original pulmonary annular. And the space between the pericardium and the original pulmonary annular formed the second orifice.