effects of ph ( 6.0 , 6.5 , 7.0 , 7.4 , 8.0 , 8.5 and 9.0 ) on the canine sino-atrial node were studied using isolated right atrial preparations which were obtained from puppies and perfused with oxygenated tyrode solution through the dorsal right atrial artery ( sinus node artery ) .
C0037189
sino-atrial
C0225844
right atrial