in rabbit hearts , nipradilol at concentrations greater than 10 ( -5 ) m caused a significant prolongation of atrio-his bundle conduction time ( ah ) as well as his bundle-ventricular conduction time ( hv ) , whereas heart rate ( hr ) , functional refractory period of atrioventricular node ( frpvm ) were unaffected .
C0018787
hearts
C0006382
his bundle