Jump to: Page Content, Site Navigation, Site Search,
You are seeing this message because your web browser does not support basic web standards. Find out more about why this message is appearing and what you can do to make your experience on this site better.
Blockade after myocardial infarction: systematic review and
meta regression analysis
Nick Freemantle a Medicines Evaluation Group, Centre for Health
Economics, University of York, York YO10 5DD, b Department of Cardiology, Castle Hill Hospital, University of
Hull, Kingston upon Hull, U16 5JQ, c Department of Health Sciences and Clinical
Evaluation, University of York
Correspondence to: N Freemantle meg{at}york.ac.uk
Objectives:
To assess the effectiveness of
blockers in short term treatment for acute myocardial infarction and in longer term secondary prevention; to examine predictive factors that
may influence outcome and therefore choice of drug; and to examine the
clinical importance of the results in the light of current treatment.
Design:
Systematic review of randomised controlled trials.
Setting:
Randomised controlled trials.
Subjects:
Patients with acute or past myocardial infarction.
Intervention:
Blockers compared with control.
Main:
outcome measures All cause mortality and
non-fatal reinfarction.
Results:
Overall, 5477 of 54 234 patients (10.1%)
randomised to
blockers or control died. We identified a 23%
reduction in the odds of death in long term trials (95% confidence
interval 15% to 31%), but only a 4% reduction in the odds of death
in short term trials (
8% to 15%). Meta regression in long term
trials did not identify a significant reduction in effectiveness in
drugs with cardioselectivity but did identify a near significant trend towards decreased benefit in drugs with intrinsic sympathomimetic activity. Most evidence is available for propranolol, timolol, and
metoprolol. In long term trials, the number needed to treat for 2 years
to avoid a death is 42, which compares favourably with other treatments
for patients with acute or past myocardial infarction.
Conclusions:
Blockers are effective in long term
secondary prevention after myocardial infarction, but they are
underused in such cases and lead to avoidable mortality and morbidity.
Key messages
blockade in secondary
prevention after myocardial infarction were published in the 1960s
blockers were once heralded as a major advance, but their
use for secondary prevention has declined in recent years
blockade remains an
effective and well tolerated treatment that reduces mortality and
morbidity in unselected patients after myocardial infarction
blockade compare favourably with other
drug treatments for this patient group
blockers in hypertension and cardiovascular disease
Blockade after myocardial infarction
blockers after myocardial infarction saves lives, but they are underused
Read all Rapid Responses