when blood samples were taken from coronary sinus just before em test , all patients with variant angina exhibiting markedly augmented txb2 levels ( 424 +/- 138 pg/ml ) , had positive em test results , while cps exhibiting lower txb2 levels ( 223 +/- 38 pg/ml ) , had negative em test .
C0002963
variant angina
C0059514
em