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Efficacy of statin therapy in chronic systolic cardiac insufficiency: a meta-analysis
Shuning Zhang1, Lei Zhang, Aijun Sun
1Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China.
Insights
Statins did not significantly improve outcomes for most chronic systolic heart failure patients. However, atorvastatin and use in patients under 65 showed reduced mortality and heart failure readmissions.
Area of Science:
- Cardiology
- Pharmacology
- Clinical Trials
Background:
- Conflicting evidence exists regarding the efficacy of statin therapy in patients with chronic systolic heart failure (CHF).
- Randomized controlled trials (RCTs) have yielded varied results, necessitating a comprehensive meta-analysis.
Purpose of the Study:
- To investigate the effect of statins on clinical outcomes in patients with chronic systolic heart failure (CHF).
- To conduct a meta-analysis of randomized controlled trials (RCTs) to clarify statin's role in CHF management.
Main Methods:
- A systematic literature search was performed across major databases (PubMed, MEDLINE, EMBASE, Cochrane) up to February 2011.
- Included were RCTs comparing statin versus placebo in established CHF patients, reporting clinical outcomes.
- Risk ratios (RR) were calculated using a random effects model for pooled analysis.
Main Results:
- The meta-analysis included 13 trials with 10,447 CHF patients.
- Statin treatment did not significantly reduce all-cause death (RR=0.93), cardiovascular death, pump failure, or heart failure rehospitalization (RR=0.90).
- A trend towards reduced nonfatal myocardial infarction (RR=0.84) was observed. Atorvastatin and statin use in patients <65 years showed significant reductions in mortality and readmissions.
Conclusions:
- Statin therapy demonstrates limited impact on overall clinical outcomes in chronic systolic heart failure patients.
- Specific statins, like atorvastatin, and patient populations, such as those under 65, may benefit from statin treatment.
- Statin administration is feasible in CHF patients, with potential efficacy in select subgroups.
Background:
Conflicting results currently exist on the clinical use of statins in patients with chronic systolic heart failure (CHF). This study aimed to investigate the effect of statins on clinical outcomes of CHF by a meta-analysis based on randomized controlled trials (RCTs).
Methods:
We searched PubMed, MEDLINE, EMBASE, and Cochrane databases through 2010 and renewed in February 2011. We included RCTs of subjects who underwent statin or placebo treatment for established CHF, and provided data on clinical outcomes. Risk ratios (RR) were calculated using a random effects model.
Results:
Thirteen trials involving 10,447 CHF patients were included in the meta-analysis. The pooling analysis showed that statin treatment did not significantly reduce the risk of all-cause death (RR=0.93, 95% CI: 0.81-1.07, p=0.31), death for cardiovascular cause or pump failure (p>0.10), and rehospitalization for heart failure (RR=0.90, 95% CI: 0.78-1.04, p=0.15). In addition, statin therapy had a non-significant trend towards reduced risk of nonfatal myocardial infarction (RR=0.84, 95% CI: 0.68-1.02, p=0.08). When restricted to various statins and patients' age, the analysis demonstrated that atorvastatin was associated with reduced all-cause mortality (p=0.009) and readmission rate for heart failure (p=0.005), and the superiority of statin therapy was significant in CHF patients less than 65years (both p<0.01).
Conclusions:
Although statin has little impact on clinical outcomes in overall CHF patients, statin administration if needed is feasible to CHF patients, and the treatment might be effective when restricted to specific statins or populations.
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