they also suggest that the ventricular bradycardia does not involve either the muscarinic cholinoceptors or the alpha- or beta-adrenoceptors , though the results obtained after pindolol or yohimbine suggest possible involvement of a fall in sympathetic tone by stimulation of presynaptic or central alpha2-adrenoceptors , particularly in the persistence of the bradycardic effect .
C0031937
pindolol
C0428977
bradycardic