Does Anatomic Phenotype of Mitral Annular Disjunction Impact Survival? An Autopsy-Based Retrospective Study

Journal of Cardiovascular Development and Disease

Da Zheng¹  Nan Zhou¹  Kai Zhang¹  Danmi Mao¹  Qianhao Zhao¹  Rui Li¹  Yuxi Xiao¹  Yunyi Wang¹  Jianding Cheng¹  Jiacheng Yue¹  Jonathan C. Makielski² 

[1] Department of Forensic Pathology, Zhongshan School of Medicine, Sun Yat-sen University, No. 74, Zhongshan 2nd Road, Guangzhou 510080, China;Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin, Madison, WI 53792, USA;

关键词: mitral annular disjunction;    prevalence;    poor survival;    morphology;   

DOI  :  10.3390/jcdd8120174

来源: DOAJ

【 摘 要 】

Controversies have been raised regarding the prevalence and potential clinical significance of mitral annular disjunction (MAD). We aim to address the anatomic characteristics of MAD and their association, if any, on survival. We retrospectively reviewed 1373 consecutive dissected hearts (1017 men, mean age at death 44.9 ± 0.4 y) and frequently detected MAD (median disjunctional length: 2.0 mm, range: 1.5 mm~8.5 mm), with the prevalence of 92.1% over the entire mitral annulus and 74.9% within the posterior annulus (pMAD). The presence of pMAD was associated with increased all-cause mortality (45 y vs. 49 y, hazard ratio [HR]: 1.28, 95% confidence interval [CI]: 1.11~1.47, p < 0.001), which persisted in the context of cardiovascular diseases (CVDs; 46 y vs. 51 y, HR: 1.33, 95% CI: 1.14~1.56, p < 0.001) but was insignificant in those without CVDs. Compared to those without pMAD, individuals with pMAD affecting the entire posterior annulus or having a mean standardized length of ≥1.78 showed other clinically significant cardiovascular phenotypes, including the enlargement of aortic annular circumferences and a higher occurrence of thoracic aortic aneurysm/dissection. This largest series of autopsies show that MAD is a common phenotype that may exert additive influence on the survival of individuals. It is necessary to establish a precise classification and stratification of MAD.

【 授权许可】

Unknown