cardiac beta-adrenoceptors and the positive inotropic effects of adenylate cyclase-dependent ( dobutamine , histamine , forskolin ) and adenylate cyclase-independent agents ( isobutylmethylxanthine ( ibmx ) , dibutyryl-camp ( db-camp ) , digoxin , digitoxin and calcium were measured in papillary muscle strips from severely failing ( nyha iv ) , moderately failing ( nyha ii-iii ) and non-failing ( nyha i ) human hearts .
C0001643
beta-adrenoceptors
C0086418
human