Corrected transposition of the great arteries

ABSTRACT

The corrected transposition of the great arteries is an usual congenital cardiac malformation, which consisitsof transposition of great arteries and ventricular inversion, and which is caused by abnormal developement ofconotruncus and ventricular looping. High frequency of associated cardiac malformations makes it difficult to getaccurate morphologic diagnosis. A total of 18 cases of corrected transposition of the great arteries is presented,in which cardiac catheterization and angiocardiography were done at the Department of Radiology, Seoul NationalUniversity Hospital between Sep. 1976 and June 1981. The clinical, radiogrpahic ,and operative findings with theemphasis on the angiocardiographic findings were analized. The resuls are as follows; 1. Among 18 cases, 13 caseshave normal cardiac position, 2 cases have dextrocardia with situs solitus, 2 cases have dextrocardia with situsinversus and 1 case has levocardia with situs inversus. 2. Segmental sets are {S.L.L.} in 15 cases, and {I.D.D} in3 cases and there is no exception to loop rule. 3. Side by side interrelationships of both ventricles and bothsemilunar valves are noticed in 10 and 12 cases respectively. 4. Subaortic type conus is noted in all 18 cases. 5.Associated cardiac malformations are VSD in 14 cases, PS in 11, PDA in 3, PFO in 3, ASD in 2, right aortic arch in2, tricuspid insufficiency, mitral prolapse, persistent left SVC and persistent right SVC in 1 case respectively.6. For accurate diagnosis of corrected TGA, selective biventriculography using biplane cineradiography is anessential procedure.