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标题：Percentage Incidence, Morphology and Morphometry of Myocardial Bridges: A Cadaveric Study
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作者：Sujatha. M ; T. Jayachandra Pillai ; L. Anandakumar 等
期刊名称：International Journal of Anatomy and Research
印刷版ISSN：2321-4287
出版年度：2015
卷号：3
期号：2
页码：1092-1098
DOI：10.16965/ijar.2015.159
出版社：International Journals of Medical and Health Research
摘要：Introduction : Myocardial bridging is the term used when a segment of major epicardial coronary artery runs intramuscularly under the tunnel formed by fibers of myocardium that bridges instead of it’s normal or routine epicardial path. In the literature there are varying reports on clinical implications of myocardial bridges from protection against atherosclerosis to myocardial ischemia, as well as leading to infarction and sudden cardiac death. Materials and Methods: 150 adult formalin fixed human hearts which were available in the department of Anatomy and Forensic Medicine, S.V.Medical College, Tirupati, Andhra Pradesh, India. These hearts were dissected and observed for the presence, location, type, number and direction of myocardial bridges and their association with coronary dominance. With the help of digital calipers morphometric parameters (length, width& thickness) of myocardial bridges and length of blood vessel underneath the myocardial bridge were measured, noted and photographs were taken. Results: The overall incidence of myocardial bridges was 20.6%( 31/150). Among these 18.6% (28/31) were on left anterior descending (LAD) artery and 2% (03/31) were on posterior interventricular (PIV) artery. The direction of muscle fibers in the bridges were oblique to the direction of the coronary vessels in majority of cases. Length, width and thickness of myocardial bridges were in the range of 12 – 69.7mm, 3.74 – 8.6mm and1.3 – 3.87mmrespectively. Conclusions : Myocardial bridges may be associated with wide range of clinical problems. Contraction of myocardial bridge may results in vascular compression and myocardial ischemia. Knowledge on morphology and morphometric details of myocardial bridges facilitates cardiologists in diagnosis, planning therapeutic strategies and prognostic predictions.
关键词：Coronary dominance; left anterior descending (LAD) artery; posterior interventricular artery (PIV); myocardial bridge (MB).