if they were compared with norepinephrine levels in right atrial samples from 11 patients without heart failure , obtained at open heart surgery ( 17.6 +/- 6 pg/micrograms ncp ) , an atrioventricular gradient , with ventricular norepinephrine content being 58 % of right atrial levels was calculated for healthy human hearts .
C0018827
ventricular
C0018787
hearts