therefore , in 13 patients undergoing electrophysiologic study , arterial plasma norepinephrine and epinephrine were measured before , during and 1 , 3 , 5 , 10 and 15 minutes after ventricular tachycardia induced by programmed stimulation and terminated by a single 100 j external countershock .
C0028351
norepinephrine
C0014563
epinephrine