Unstable Angina and Coronary Arteriographic Findings with Special Reference to Coronary Vasospasm : Unstable Angina

概要

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The organic stenosis of the coronary artery and vasospasm induced by ergonovine maleate (EM) were examined by cine angiography in 106 cases with unstable angina. They were divided into 5 groups : new angina at rest (27 cases), new angina of effort (15 cases), changing pattern from effort to rest (41 cases), crescendo-type angina at rest (20 cases) and changing pattern from rest to effort (3 cases). The following results were obtained : The incidence of a 75% or more organic stenosis was significantly lower in new angina at rest (52%) and crescendo-type angina at rest (55%) than in changing pattern from rest to effort (95%) (p<0.005). The incidence of a 90% or more organic stenosis was significantly lower in new angina of effort than in changing pattern from effort to rest (46% vs 88%, p < 0.01). On the other hand, the incidence of a 50% or more spastic narrowing provoked by EM was 94% in new angina at rest, 90% in crescendo-type angina at rest, 56% in new angina of effort and 64% in changing pattern from effort to rest. In all 3 cases of changing pattern from rest to effort, total obstructions due to coronary spasm were found. However, there were no significant differences among these groups.
社団法人日本循環器学会の論文
1983-04-20