an atropine resistant bradycardia was characteristic ( hr = 65 +/- 17.2/min ) due to advanced or complete av block ( 11 cases ) , sinoatrial block ( 3 cases , one with right atrial standstill ) or sinus/parasinus rhythm ( 13 cases ) inappropriate to the severity of their hemodynamic state .
C0004259
atropine
C0037188
sinoatrial block