ACE and heart failure: Thirty-two DCM and five RCM patients were on medication for heart failure, including β-blockers (n = 26, 59% and n = 3, 43%, respectively), angiotensin-converting enzyme inhibitors (n = 32, 73% and n = 5, 71%, respectively), diuretics (n = 29, 66% and n = 3, 43%, respectively), and digoxin (n = 5, 11% and n = 0, 0%, respectively).