[Two adult cases with corrected transposition of the great arteries treated with permanent endocardial pacemaker implantation].

[Case 1] A 32 year-old male had (I, D, D) type corrected transposition of the great arteries (cTGA) associated with ventricular septal defect and pulmonary stenosis. [Case 2] A 69 year-old male had (S, L, L) type cTGA associated with tricuspid regurgitation. Both cases showed advanced atrioventricular (AV) block due to HV block. Both patients had endocardial DDD pacemakers implanted, with no complication. (I, D, D) type cTGA is rarely accompanied with AV block, while the incidence of AV block is high in (S, L, L) type cTGA. We speculate that this results from the difference in the position of the AV node between these two types.