to clarify the role of thromboxane a2 ( txa2 ) in evoking coronary spasm , we compared coronary arterial spasticity induced by ergonovine maleate ( em ) with coronary sinus thromboxane b2 ( txb2 : a stable catabolite of txa2 ) in 34 patients with documented variant angina and 11 patients with chest pain syndrome ( cps ) .
C0059514
ergonovine maleate
C0002963
variant angina