contractile responses to the nonselective beta-agonist isoproterenol , the beta 2-selective agonist zinterol , and the direct- and indirect-acting agonists dopamine and dopexamine were compared in isolated right ventricular trabeculae removed from failing , nonfailing innervated , and previously transplanted and , therefore , denervated nonfailing human hearts .
C0225883
right
C0018787
hearts