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[Two adult cases with corrected transposition of the great arteries treated with permanent endocardial pacemaker
Y Hayashi1, K Yamamoto, H Hasegawa
1Department of Cardiology, Jichi Medical School.
Insights
Corrected transposition of the great arteries (cTGA) can cause advanced atrioventricular (AV) block. Pacemaker implantation was successful in patients with (I, D, D) and (S, L, L) type cTGA, suggesting anatomical differences influence AV block incidence.
Area of Science:
- Cardiology
- Congenital Heart Disease
- Electrophysiology
Background:
- Corrected transposition of the great arteries (cTGA) is a complex congenital heart defect.
- Atrioventricular (AV) block, particularly HV block, can be a serious complication of cTGA.
- Different subtypes of cTGA may have varying risks of developing AV block.
Abstract:
[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.