we studied the effect of a new positive inotropic agent , opc-8212 ( 3,4-dihydro-6- [ 4- ( 3,4-dimethoxybenzoyl ) -1-piperazinyl ] -2 ( 1h ) -quinolinon e ) , on the relation between left ventricular oxygen consumption ( vo2 ) and pressure-volume area ( pva ) in excised cross-circulated dog hearts .
C0225897
left ventricular
C0018787
hearts