Complex sentence: For patients in acute heart failure, ACE inhibitors, angiotensin receptor blockers, and beta blockers, are considered mainstays of treatment, but use of beta blockers for takotsubo cardiomyopathy is controversial because they may confer no benefit.
Split into simpler sentences: For patients in acute heart failure, ACE inhibitors, angiotensin receptor blockers, and beta blockers, are considered mainstays of treatment. But use of beta blockers for takotsubo cardiomyopathy is controversial because they may confer no benefit.