title: [Angiographic findings in non-Q wave infarction and their relation to ST-T changes].
abstract: Non q wave myocardial infarction has been attributed to occlusion of a vessel with no ECG representation, early reperfusion of the occluded artery or occlusion of a vessel with generous collateral flow. The coronary arteriography of 84 patients with non Q wave myocardial infarction performed at 16 + 17 (SD) days after infarction was analyzed. Main left lesion was found in 6 (17%), single vessel disease in 30 (36%), two vessel disease in 18 (24%) and 3 vessel disease in 16 (19%). The "culprit" vessel had a critical residual lesion in 38 patients (45%): 22 affected the left anterior descending artery, 10 the circumflex, and 5 the right coronary artery. No residual lesion was found in 10 patients (12%). An occluded artery was found in 32 patients (38%): circumflex in 20, right coronary artery in 9 and left anterior descending in 3 (p < 0.01). Significant collateral flow to the occluded vessel was present in 41% of cases. The ST segment was analyzed in 82 patients. Depression of ST was found in 29 (35%), elevation in 22 (27%), negative T waves in 17 (21%) and minimal alterations in 17%. There was no correlation between ST levels and coronary occlusion of the culprit artery. Depression of ST was more commonly (p < 0.01) associated with severe coronary artery disease (main left or 3 vessel disease), which may be related to the poorer prognosis in these cases.
authors.affiliation: Centro Cardiovascular, Hospital Clínico Universidad de Chile, Santiago.
authors.forename: H
authors.initials: H
authors.lastname: Chamorro
authors.forename: I
authors.initials: I
authors.lastname: Barquín
authors.forename: P
authors.initials: P
authors.lastname: Gómez
authors.forename: F
authors.initials: F
authors.lastname: Ayala
authors.forename: A
authors.initials: A
authors.lastname: Ramírez
authors.forename: A M
authors.initials: AM
authors.lastname: Silva
authors.forename: P
authors.initials: P
authors.lastname: Quispe
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017023:Coronary Angiography; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000000981:diagnostic imaging* / Q000209:etiology / Q000503:physiopathology
vernacular_title: Hallazgos angiográficos del infarto no Q y su relación con las alteraciones del ST-T.