after atropine and pindolol , which raised basal atrial rate , alinidine ( 2 mg/kg ) decreased atrial rate , whereas after phenoxy-benzamine , yohimbine or phentolamine , it produced atrial effects identical to those observed under basal conditions , i.e. , initial tachycardia and no bradycardia .
C0004259
atropine
C0428977
bradycardia