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Updated: Jan 26, 2026

Myocardial Infarction and Functional Outcome Assessment in Pigs
Published on: April 25, 2014
Different outcomes of a cardiac rehabilitation programme in functional parameters among myocardial infarction
E M Vilela1, R Ladeiras-Lopes2, C Ruivo3
1Department of Cardiology, Gaia Hospital Centre, Vila Nova de Gaia, Portugal. eduardomvilela@gmail.com.
Insights
Exercise-based cardiac rehabilitation (EBCR) significantly improves exercise capacity in acute myocardial infarction (AMI) survivors. Patients with reduced ejection fraction (EF) benefit even more, underscoring EBCR
Area of Science:
- Cardiology
- Sports Medicine
- Rehabilitation Science
Background:
- Exercise-based cardiac rehabilitation (EBCR) is crucial for acute myocardial infarction (AMI) survivors.
- Patients with reduced ejection fraction (EF) represent a high-risk group often under-referred for EBCR.
- Assessing the impact of baseline EF on EBCR benefits is vital for optimizing patient care.
Purpose of the Study:
- To evaluate the functional benefits of EBCR in AMI survivors.
- To determine if baseline ejection fraction (EF) influences the improvements in peak oxygen uptake (pVO2) and exercise duration.
- To highlight the importance of EBCR for high-risk AMI patients with reduced EF.
Main Methods:
- Retrospective cohort study of 379 AMI survivors who completed phase II EBCR.
- Functional parameters including peak oxygen uptake (pVO2) and exercise duration assessed via cardiopulmonary exercise testing.
- Analysis of baseline EF impact on exercise capacity improvements post-rehabilitation.
Main Results:
- EBCR significantly improved pVO2 and exercise duration in all AMI survivors (p < 0.001).
- Patients with reduced EF (<50%) had lower initial exercise capacity but showed a greater increase in pVO2 (p = 0.001) and exercise duration (p = 0.007).
- These findings remained significant after adjusting for multiple clinical confounders.
Conclusions:
- Phase II EBCR programs yield significant functional improvements for AMI survivors, regardless of baseline EF.
- AMI survivors with reduced baseline EF experience even greater benefits from EBCR.
- EBCR is critically important for improving outcomes in the high-risk subgroup of AMI patients with reduced EF.
Introduction:
Exercise-based cardiac rehabilitation (EBCR) is part of the management of patients who have suffered an acute myocardial infarction (AMI). Patients with a reduced ejection fraction (EF) comprise a higher-risk subgroup and are referred less often for these programmes. This study aimed at assessing the impact of the baseline EF on the functional benefits, as assessed by peak oxygen uptake (pVO2) and exercise duration, of an EBCR programme in AMI survivors.
Methods:
Observational, retrospective cohort study including all patients admitted to a tertiary centre due to an AMI who completed a phase II EBCR programme after discharge, between November 2012 and April 2017. Functional parameters were assessed by a symptom-limited cardiopulmonary exercise test.
Results:
A total of 379 patients were included [40.9% with reduced EF (<50%) at discharge]. After the programme, pVO2 and exercise duration increased significantly (p < 0.001). Patients with a reduced EF had a lower pVO2 and completed a shorter duration of exercise at the beginning and end of the programme. This group presented a higher increase in pVO2 (p = 0.001) and exercise duration (p = 0.007). This was maintained after adjusting for age, gender, history of coronary artery disease, number of sessions, Killip classification, arterial hypertension, dyslipidaemia, diabetes mellitus, smoking status and baseline pVO2.
Conclusion:
A phase II EBCR programme was associated with significant improvements in pVO2 and exercise duration among AMI survivors, irrespective of baseline EF classification. Those with a reduced baseline EF derived an even greater improvement, highlighting the importance of EBCR in this subgroup of patients.
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