Sinus bradycardia during injections directly into the sinus node artery.
D001146:Arrhythmia, Sinus; D001145:Arrhythmias, Cardiac; D001919:Bradycardia; D003331:Coronary Vessels; D006329:Heart Conduction System; D006801:Humans
ARRHYTHMIA, SINUS; BRADYCARDIA; CORONARY VESSELS; HEART CONDUCTION SYSTEM