title: [Prognosis of spontaneous occlusions in tight coronary stenosis].
abstract: Eighteen out of 408 patients assigned to coronary angioplasty rapidly developed complete obstruction of the vessel to be dilated. The results of a retrospective study of clinical, biochemical, angiographic and/or angio-scintigraphic events in these 18 patients are reported. The interval between the two coronary arteriographies was 67 +/- 66 days. Angina was initially unstable in 9 patients and stable in 6; 3 patients were asymptomatic. Coronary lesions followed the usual distribution pattern: the left anterior descending artery was involved in 11 cases, the circumflex artery in 4 cases and the right coronary artery in 3 cases. Overall, the degree of stenosis was high (86 +/- 7%); Following obstruction the course of the disease was favourable in 11 patients (61%), with complete remission of all symptoms in 5. Six patients remained with unstable angina. Apart from one case of sudden death, none of the patients developed myocardial infarction, as shown by the absence of significant biochemical, electrical and angiographic changes. The importance of pre-existing or newly developed collateral circulation as a good prognosis factor is highlighted.
mesh_terms: D000328:Adult; D000368:Aged; D000800:Angioplasty, Balloon; D003097:Collateral Circulation; D003251:Constriction, Pathologic / Q000503:physiopathology / Q000628:therapy; D003327:Coronary Disease / Q000503:physiopathology* / Q000628:therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D013997:Time Factors
vernacular_title: Pronostic des occlusions spontanées de sténoses coronaires serrées.