What is the clinical evidence from this study?

Study design: Meta-Analysis. Population: Heart failure (n=813). Intervention: Aerobic exercise training vs. Control. Primary outcome: Ejection fraction (EF) (SMD 0.44, 95% CI 0.28 to 0.61).

What question did this study set out to answer?

To determine whether exercise training reverses left ventricular remodelling in patients with heart failure.

July 16, 2012International Journal of Clinical Practice

Effects of exercise training on left ventricular remodelling in heart failure patients: an updated meta-analysis of randomised controlled trials

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Key result

Aerobic exercise training improved ejection fraction (SMD 0.44; 95% CI 0.28 to 0.61) and reversed left ventricular remodelling in clinically stable patients with heart failure.

Why the study?

Does exercise training improve left ventricular remodelling in clinically stable patients with heart failure?

Key Points

To determine whether exercise training reverses left ventricular remodelling in patients with heart failure.
Searched MEDLINE, Cochrane Central Register of Controlled Trials, CINAHL, EMBASE, and PubMed through October 2011 for randomized controlled trials.
Identified 15 randomized controlled trials comprising 813 heart failure patients evaluating exercise training interventions.
Calculated standardized mean differences (SMD) and 95% confidence intervals (CI) for ejection fraction (EF), end-diastolic volume (EDV), and end-systolic volume (ESV), stratified by exercise modality and duration.
Aerobic exercise significantly improved cardiac structure and function, increasing EF (SMD = 0.44; 95% CI 0.28 to 0.61) while decreasing EDV (SMD = -0.33; 95% CI -0.49 to -0.16) and ESV (SMD = -0.40; 95% CI -0.57 to -0.23).
Subgroup analysis showed long-term aerobic exercise (≥6 months) produced significant anti-remodelling effects (EF: SMD = 0.50, 95% CI 0.31 to 0.69; EDV: SMD = -0.38, 95% CI -0.57 to -0.19; ESV: SMD = -0.48, 95% CI -0.67 to -0.29), whereas short-term aerobic exercise (<6 months) failed to show clear benefit (EF: SMD = 0.27, 95% CI -0.08 to 0.61; EDV: SMD = -0.14, 95% CI -0.48 to 0.21; ESV: SMD = -0.08, 95% CI -0.47 to 0.30).
Strength training, performed alone or combined with aerobic training, did not produce significant improvements in EDV or ESV, with all confidence intervals crossing zero.

Study Design

Type

Meta-Analysis (n=813)

Structured PICO

Does exercise training improve left ventricular remodelling in clinically stable patients with heart failure?

Population

813 clinically stable patients with heart failure included across 15 randomised controlled trials.

Intervention

Exercise training (aerobic training, strength training alone, or combined aerobic and strength training) of varying durations (short-term <6 months or long-term ≥6 months).

Outcome

Left ventricular remodelling assessed by ejection fraction (EF), end-diastolic volume (EDV), and end-systolic volume (ESV).surrogate

Main Result

Standardized Mean Difference: 0.44 (95% CI 0.28–0.61)

Long-term aerobic exercise training (≥6 months) significantly improves left ventricular ejection fraction and reduces end-diastolic and end-systolic volumes in clinically stable heart failure patients.

Discussion

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Implication

Supports aerobic exercise as adjunctive therapy in stable HF; strengthens evidence for reverse remodeling across trials.

Cite This Study

Chen et al. (2012) conducted a meta-analysis in Heart failure (n=813). Aerobic exercise training vs. Control was evaluated on Ejection fraction (EF) (SMD 0.44, 95% CI 0.28 to 0.61). Aerobic exercise training improved ejection fraction (SMD 0.44; 95% CI 0.28 to 0.61) and reversed left ventricular remodelling in clinically stable patients with heart failure.

synapsesocial.com/papers/6a79bb41756812e395893ab3 https://doi.org/10.1111/j.1742-1241.2012.02942.x

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Effects of exercise training on left ventricular remodelling in heart failure patients: an updated meta-analysis of randomised controlled trials

Key Points

Study Design

Structured PICO

Main Result

Discussion

Implication

Cite This Study

Effects of exercise training on left ventricular remodelling in heart failure patients: an updated meta-analysis of randomised controlled trials

Key Points

Study Design

Structured PICO

Main Result

Discussion

Implication

Cite This Study

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