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Histopathologic profiles of coronary atherosclerosis by myocardial bridge underlying myocardial infarction.
MedLine Citation:
PMID:  23107041     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVE: Anatomic properties of myocardial bridge (MB) are sometimes responsible for myocardial infarction (MI) through the changes in the atherosclerosis distribution in the left ascending coronary artery (LAD). The purpose of this study was to investigate histopathologic profiles of atherosclerotic lesions resulting from the MB presence in the LAD in the MI cases. METHODS: In 150 consecutive autopsied MI hearts either with MBs [MI(+)MB(+); n = 67] or without MBs [MI(+)MB(-); n = 83] and 100 normal hearts with MBs [MI(-)MB(+)], LADs were consecutively cross-sectioned at 5-mm intervals. The most advanced intimal lesion and unstable plaque-related lesion characteristics (UPLCs) in each section were histopathologically evaluated in conjunction with the anatomic properties of the MB, such as its thickness, length, location, and MB muscle volume burden (MMV: the total volume of MB thickness multiplied by MB length). RESULTS: The MB showed a significantly greater thickness (P = 0.0090), length (P = 0.0300), and MMV (P = 0.0019) in MI(+)MB(+) than in MI(-)MB(+). Mean age of acute MI cases was significantly younger (P = 0.0227) in MI(+)MB(+) than in MI(+)MB(-). Frequency of plaque fissure/rupture in the proximal LAD was significantly higher in acute MI cases of MI(+)MB(+) than in MI(+)MB(-). UPLCs tended to be located proximally in MI(+)MB(+) and frequent 2.0 cm or more proximal to the MB entrance in MI(+)MB(+). CONCLUSION: In MI(+)MB(+), UPLCs tend to be located more proximally, and a plaque in the LAD proximal to the MB is prone to rupture, resulting in MI at younger age.
Authors:
Yukio Ishikawa; Yoshikiyo Akasaka; Yuri Akishima-Fukasawa; Ami Iuchi; Koyu Suzuki; Mieko Uno; Eriko Abe; Yang Yang; Chin-Ping Li; Kiyoshi Mukai; Hitoshi Niino; Michio Tanaka; Yutaka Kawahara; Hitoshi Sugiura; Toshihito Shinagawa; Shojiroh Morinaga; Kentaro Ogata; Junko Onuma; Maki Yanagida-Iida; Kazuhiro Taki; Akio Komatsu; Hideaki Satoh; Kazuaki Yamada; Reiko Shimokawa; Kazutoshi Shibuya; Kei Takahashi; Toshiharu Ishii
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-16
Journal Detail:
Title:  Atherosclerosis     Volume:  -     ISSN:  1879-1484     ISO Abbreviation:  Atherosclerosis     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0242543     Medline TA:  Atherosclerosis     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.
Affiliation:
Department of Pathology, Toho University School of Medicine, 5-21-16 Omori-nishi, Ota-ku, Tokyo 143-8540, Japan. Electronic address: yukio@med.toho-u.ac.jp.
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