Angiocardiographic Measurement of the Right Main Pulmonary Artery in Congenital Heart Disease

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Abstract
The linear regression equation to predict the normal values, by correlating the end-systolic cross-sectional area of the RPA [right pulmonery artery] with the BSA (m2), was obtained in 15 normal cases. One hundred forty cases (33 of VSD [ventricular septal defect] 36 of ASD [atrial septel defect] 30 of PS Tetrafogy and 41 of Fallot) were studied, and in ll of them the same correlation was made. This study Is also comprised of 6 cases of stenosis or coarctation of this vessel, 3 of multiple peripheral stenosis of both right and left pulmonary artery branches, and 8 of TA [trecuspld atresea]. Above normal values were found In 57.6% of cases of VSD and 47.7% of ASD, most of the cases with very high pulmonary resistance and high pulmonary blood flow had enlargement of this vessel. Seventy per cent of T. of Fallot cases present values below normal. Seventy-five per cent of cases of TA in 83.3% of cases of stenosis or RPA present values above the normal coarctatton. In a statistical analysis, the area of the RPA in the majority of the cases is related to the size of the MPA [Main pulmonary artery] in VSD and ASD. Nonetheless, in PS and T. of Fallot there is no often relationship between the size of both vessels.