the relationship between long-term propranolol hydrochloride therapy and subsequent coronary bypass operation was prospectively investigated in 119 patients who were grouped three ways : propranolol therapy continued in full dosage to operation ( group a ) , propranolol therapy discontinued or tapered 24 to 72 hours preoperatively ( group b ) , and no preoperative propranolol therapy ( control group ) .
C0282321
propranolol hydrochloride
C0033497
propranolol