Does propranolol precipitate hepatic encephalopathy?

A 52-year-old woman with primary biliary cirrhosis who had never had hepatic coma developed it while taking propranolol. The coma receded when the propranolol was stopped and 2 days later gastrointestinal bleeding did not precipitate hepatic coma. This raises the question whether propranolol and other beta blockers lead to hepatic encephalopathy.