[Prospective study on the mechanism of XXXX without significant coronary stenosis].

@entity1 @entity1148 @entity2289 @entity3361 @entity1003 @entity854 @entity1188 @entity1856 @entity583 @entity715 @entity438
The aim of this study was to evaluate prospectively the respective roles of the @entity1856 , @entity3361 and @entity854 in @entity1 with @entity583 with normal coronary arteries. The study population included 25 @entity1 (19 @entity1 and 6 @entity1 ) with a mean age of 52.1 +/- 11.1 years (34-76 years). The diagnosis of @entity583 was made as the finding of 2 out of 3 WHO criteria. It occurred spontaneously and was transmural in 80% of cases, inferior wall @entity1188 in 9 @entity1 (36%), anterior in 12 (48%) and lateral in 4 @entity1 (16%). All @entity1 underwent investigation on average 10 days after @entity1188 (1-42 days) by coronary angiography with quantitative angiography, endocoronary ultrasonography, an ergometrine provocation test for @entity3361 and a @entity1003 study. Coronary angiography was normal in 4 @entity1 but showed wall changes without stenosis > 50% in 20 @entity1 and one case of @entity438 . Intracoronary @entity715 was detected in 6 cases. Endocoronary ultrasonography confirmed the normality of the coronary arteries in 2 cases and showed @entity1856 in 23 cases (soft @entity1856 : n = 17 and hard: n = 6). It detected 66% of the coronary thrombi observed at angiography and found 3 other cases. @entity3361 was verified in 10 @entity1 (40%). The coagulation study was normal in 19 @entity1 and showed increase in @entity2289 in 5 @entity1 and primary @entity1148 in one case. The authors conclude that coronary angiographic data is less accurate than endo-coronary ultrasonography which best shows the extent and, above all, the nature of the plaques present in 23 of the cases (92%). @entity3361 may be a contributing factor in 40% of cases, in situ @entity715 in 36% of cases despite usually normal blood clotting studies. None of these abnormalities was observed in one case. The embolic cause of @entity1188 was certain in 2 cases.
