A number of important questions surrounding the treatment of systolic
congestive heart failure have been answered by randomised clinical tri
als completed within the past 2 years. In particular, these studies ha
ve established that high-dose angiotensin-converting enzyme (ACE) inhi
bition is more beneficial than low dose therapy, and that angiotensin
II receptor antagonists are an acceptable alternative in patients unab
le to tolerate ACE inhibitors. Digoxin has been shown to be the only i
notropic agent not associated with increased mortality, while amiodaro
ne exerts a modest survival benefit in arrhythmia-prone patients. Beta
-blockers appear to be beneficial for selected patients although their
precise role remains to be defined by ongoing studies.