upon infusion of isoproterenol ( 3 x 10 ( -7 ) m ) into the coronary arteries of the isolated heart ( perfusion at constant pressure ) , the adenosine concentration in the effluent perfusate increased within 45 s from 10 ( -8 ) m to about 10 ( -6 ) m .
C0205042
coronary arteries
C0018787
heart