to evaluate the effects of calcium entry blocking agents on cardiac sympathetic tone during angina pectoris , arterial and coronary sinus ( cs ) norepinephrine ( ne ) and epinephrine ( e ) concentrations and cs blood flow were determined at rest and during pacing-induced angina , both before and after verapamil in nine patients and after nifedipine in nine patients , all of whom had fixed obstructive coronary artery disease .
C0028351
norepinephrine
C0014563
epinephrine