Clinical significance of myocardial squeezing of the coronary artery.
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- HASHIMOTO Akihisa
- the Department of Cardiovascular Medicine, Kanazawa Medical University
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- TAKEKOSHI Noboru
- the Department of Cardiovascular Medicine, Kanazawa Medical University
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- MURAKAMI Eiji
- the Department of Cardiovascular Medicine, Kanazawa Medical University
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説明
We investigated the coronary angiography (CAG) of 1, 022 patients to clarify the clinical significance of myocardial squeezing and obtained the following results. <BR>1) Of 1, 022 patients undergoing CAG, 164 patients (16.0%) had myocardial squeezing of the left anterior descending artery (LAD) and 16 patients (1.6%) had only the first septal perforating branches producing a squeezing of the artery during systole. The association of myocardial squeezing of the LAD with different diagnosis was anterior chest pain syndrome (26.6%), arrhythmia (23.6%), cardiomyopathy (21.7%), angina pectoris (15.8%) and myocardial infarction (6.9%). <BR>2) The degree of narrowing of the LAD was classified into 4 grades; 25-49%: 36 patients (22.0%), 50-74%: 82 patients (50.0%), 75-89%: 35 patients (21.3%) and greater than 90%: 11 patients (6.7%). <BR>3) The morphology of the vessel subjected to myocardial squeezing was classified into 4 patterns on CAG. Type A is localized narrowing. Type B is bead-like narrowing. Type C is diffuse narrowing. Type D is tapering and obstructive narrowing. All type D patients had the septal perforating branches. <BR>4) We investigated whether only myocardial squeezing has ischemic ST-T segment changes in the ECG. Fifty-five of 87 patients (63.2%) with myocardial squeezing of greater than 75% and organic stenosis of less than 50% of the LAD had ischemic changes in the ECG during exercise or pacing-induced tachycardia. <BR>5) There was no special feature between myocardial squeezing and subjective symptoms.
収録刊行物
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- Ｊａｐａｎｅｓｅ Ｈｅａｒｔ Ｊｏｕｒｎａｌ
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Ｊａｐａｎｅｓｅ Ｈｅａｒｔ Ｊｏｕｒｎａｌ 25 (6), 913-922, 1984
International Heart Journal刊行会
