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연세대학교 의과대학 Yonsei Medical Journal Yonsei Medical Journal 제60권 제5호
발행연도
2019.1
수록면
423 - 428 (6page)

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Purpose: We aimed to examine associations between right bundle branch block (RBBB) following heart transplantation (HT)and graft rejection. Materials and Methods: We investigated 51 patients who underwent endomyocardial biopsies, electrocardiogram, right-side cardiaccatheterization, and echocardiography at 1 month and 1 year after HT. We classified patients into four groups according tothe development of RBBB, based on electrocardiogram at 1 month and 1 year: 1) sustained RBBB, 2) disappeared RBBB, 3) newlydeveloped RBBB, and 4) sustained non-RBBB. The RBBB was defined as an RSR' pattern in V1 with a QRS duration ≥100 ms onelectrocardiogram. Results: The newly developed RBBB group (n=13, 25.5%) had a higher rate of new onset graft rejection (from grade 0 to grade ≥1R,30.8% vs. 10.0% vs. 21.4%, p=0.042) at 1 year, compared with sustained RBBB (n=10, 19.6%) and sustained non-RBBB group (n=28,54.9%). In contrast, the incidence of resolved graft rejection (from grade ≥1R to grade 0) was higher in the sustained RBBB groupthan the newly developed RBBB and sustained non-RBBB groups (70.0% vs. 7.7% vs. 25.0%, p=0.042). Left atrial volume index wassignificantly higher in the newly developed RBBB group than the sustained RBBB and sustained non-RBBB groups (60.6±25.9 mL/m2vs. 36.0±11.0 mL/m2 vs. 38.4±18.1 mL/m2, p=0.003). Conclusion: Close monitoring for new development of RBBB at 1 year after HT, which was associated with a higher incidence ofnew onset graft rejection, may be helpful to identify high risk patients for graft rejection.

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