Glassman E, Kronzon I
Cardiology. 1977;62(4-6):347-54. doi: 10.1159/000169869.
Coronary angiograms were reviewed in 31 patients with idiopathic prolapse of the posterior mitral leaflet. There were 19 males and 12 females, ranging in age from 33 to 69. The coronary artery which supplied the posterior descending branch was designated as dominant. There were 27 dominant right coronary arteries and 4 dominant left coronary arteries. Attention was paid to whether the origin of the vessel which courses in the posterior atrioventricular groove branch was from the right coronary artery or the left circumflex. In the dominant right coronary artery group, the arterioventricular groove branch arose from the right coronary artery alone in 6 and from the left circumflex alone in 1 patient, and in 20 patients, from both. In the dominant left coronary artery group, the atrioventricular groove branch arose from the left coronary artery in all 4 patients. The frequency of dominant right coronary artery and left coronary and the origin of the atrioventricular groove branch did not differ in the patients with prolapse of the mitral valve from a control group of 30 patients similarly analyzed. In all instances, the atrioventricular groove branch arose from either the right coronary artery ro the left circumflex, or both. In no case was the arterioventricular groove branch totally absent. The results of this investigation do not support the thesis, previously advanced by others, that prolapse of the mitral valve is related to absence of the left circumflex coronary artery, but indicate a normal range of variation in coronary arterial distribution.
对31例二尖瓣后叶特发性脱垂患者的冠状动脉造影进行了回顾。其中男性19例，女性12例，年龄在33至69岁之间。供应后降支的冠状动脉被指定为主干冠状动脉。有27支右冠状动脉为主干和4支左冠状动脉为主干。重点关注走行于后房室沟分支的血管起源于右冠状动脉还是左旋支。在右冠状动脉为主干组中，房室沟分支单独起源于右冠状动脉的有6例，单独起源于左旋支的有1例，20例起源于两者。在左冠状动脉为主干组中，4例患者的房室沟分支均起源于左冠状动脉。二尖瓣脱垂患者中右冠状动脉为主干和左冠状动脉为主干的频率以及房室沟分支的起源与同样进行分析的30例对照组患者没有差异。在所有情况下，房室沟分支要么起源于右冠状动脉，要么起源于左旋支，或者两者皆有。没有一例房室沟分支完全缺失。本研究结果不支持其他人先前提出的二尖瓣脱垂与左旋支冠状动脉缺失有关的论点，而是表明冠状动脉分布存在正常范围的变异。
