the role of calcium channels in the mediation of the cardiovascular effects of synthetic ( 1-o-octadecyl-2-acetyl-sn-glyceryl-3-phosphorylcholine ) platelet-activating factor ( paf ) was studied in vivo in the rabbit and in vitro in the coronary-perfused isolated heart and papillary muscle of the guinea pig following pretreatment with verapamil , a calcium antagonist .
C0007226
cardiovascular
C0018787
heart