Abstract
A fluoroscopic method for demonstration of the marginal section of the interventricular groove located on the lower anterior surface of the heart is described, and the application of the method is discussed. A procedure for systematic radiologic study of the outflow tract and of the inflow tract of the right ventricle is described. Based upon this study the following criteria for recognition of enlargement of the right ventricle are suggested: 1. (A) Outflow tract (postero-anterior position). Prominence of the pulmonic artery and conus on the left upper or on the left upper and middle cardiac border. 2. (B) Inflow tract (left anterior oblique position). (1) Prominence of the right lower cardiac border, (2) angulation of the anterior contour, (3) broadening of the diaphragmatic outline, (4) displacement of the interventricular groove to the left and upward.
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