Clinical significance of myocardial squeezing of the coronary artery.

Publisher Website
Google Scholar
Abstract
The coronary angiography (CAG) of 1022 patients was investigated to clarify the clinical significance of myocardial squeezing and the following results were obtained. Of 1022 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 1st septal perforating branches producing a 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%). The degree of narrowing of the LAD was classified into 4 grades; 25-49%: 36 patients (22.0), 54-74%: 82 patients (50.0%), 75-89%: 35 patients (21.3%) and greater than 90%: 11 patients (6.7%). The morphology of the vessel subjected to myocardial squeezing was classified into 4 patterns on CAG. Type A was localized narrowing. Type B was bead-like narrowing. Type C was diffuse narrowing. Type D was tapering and obstructive narrowing. All type D patients had the septal perforating branches. Whether only myocardial squeezing has ischemic ST-T segment changes in the ECG was also investigated. 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. There was no special feature between myocardial squeezing and subjective symptoms.

This publication has 0 references indexed in Scilit: