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1978年1月至1987年1月间,日本国立心血管疾病中心外科为616例患者施行冠脉动脉搭桥术。其中103(男86、女17)例(全组)左主干内径狭窄>50％,分型如下,并探讨冠心病易患因素分布。大动脉炎和皮肤粘膜淋巴结综合征已除外。左主干病变按照形态特征分成四型:左主干起始部狭窄为主动脉型(A型/组),计16例(16％);左主干分枝(左前降支和右回旋支)前狭窄为分枝部型(B型/组),计55例;左主干中段狭窄为中段型(C型/组),计14例(14％);左主干弥漫性狭窄为弥漫型(D型/组),计18例(17％)。
Between January 1978 and January 1987, 616 patients underwent coronary artery bypass surgery at the National Center for Cardiovascular Disease in Japan. 103 (male 86, female 17) cases (all) of the left main stenosis> 50%, type as follows, and explore the distribution of risk factors for coronary heart disease. Arteritis and mucocutaneous lymph node syndrome have been excluded. The left main lesion was divided into four types according to the morphological features: the stenosis of the left main artery was aorta type (type A / group), accounting for 16 cases (16%); the anterior stenosis of the left main branch (left anterior descending branch and right circumflex branch) (B type / group), accounting for 55 cases; the middle of the left main stenosis was middle type (C type / group), accounting for 14 cases (14%); diffuse left main diffuse type (D type / Group), accounting for 18 cases (17%).