the effect of single oral doses of atenolol ( 100 mg ) , metoprolol ( 100 mg ) , propranolol ( 40 mg ) , and placebo on exercise tachycardia and on heart rate and finger tremor responses to graded injections of isoproterenol was investigated in six normal subjects .
C0039231
tachycardia
C0022245
isoproterenol