propranolol significantly reduced heart rate at rest ( 89 +/- 7 vs. 104 +/- 7 beats/min ) and during exercise ( 96 +/- 10 vs. 176 +/- 11 beats/min ) , and this was associated with a larger increase in plasma atriopeptin concentration during exercise ( rest 46 +/- 6 pg/ml ; exercise 171 +/- 22 pg/ml ) .
C0033497
propranolol
C0428977
reduced heart rate