the addition of uptake2 inhibitors ( 3-o-methylisoprenaline , 100 mumol/l ; normetanephrine , 100 mumol/l ; corticosterone , 100 mumol/l ) to the perfusion medium significantly reduced the positive chronotropic response to the perfusion with isoprenaline ( 3 nmol/l ) and tropolone ( 100 mumol/l ) .
C1372804
positive chronotropic
C0022245
isoprenaline