The role of cardiac rehabilitation in improving cardiovascular outcomes

Abstract

Cardiac rehabilitation is a complex intervention that seeks to improve the functional capacity, wellbeing and health-related quality of life of patients with heart disease. A substantive evidence base supports cardiac rehabilitation as a clinically effective and cost-effective intervention for patients with acute coronary syndrome or heart failure with reduced ejection fraction and after coronary revascularization. In this Review, we discuss the major contemporary challenges that face cardiac rehabilitation. Despite the strong recommendation in current clinical guidelines for the referral of these patient groups, global access to cardiac rehabilitation remains poor. The COVID-19 pandemic has contributed to a further reduction in access to cardiac rehabilitation. An increasing body of evidence supports home-based and technology-based models of cardiac rehabilitation as alternatives or adjuncts to traditional centre-based programmes, especially in low-income and middle-income countries, in which cardiac rehabilitation services are scarce, and scalable and affordable models are much needed. Future approaches to the delivery of cardiac rehabilitation need to align with the growing multimorbidity of an ageing population and cater to the needs of the increasing numbers of patients with cardiac disease who present with two or more chronic diseases. Future research priorities include strengthening the evidence base for cardiac rehabilitation in other indications, including heart failure with preserved ejection fraction, atrial fibrillation and congenital heart disease and after valve surgery or heart transplantation, and evaluation of the implementation of sustainable and affordable models of delivery that can improve access to cardiac rehabilitation in all income settings.

Fig. 1. Components of comprehensive cardiac rehabilitation.

A schematic summary of the major components of comprehensive cardiac rehabilitation. Adapted by permission from BMJ Publishing Group Limited. [Advances in rehabilitation for chronic diseases: improving health outcomes and function. Richardson C.R., Franklin B., Moy M.L., Jackson E.A., 365, l2191, 2019].

Fig. 2. Cardiac rehabilitation and all-cause mortality in patients with coronary heart disease: 1970–2020.

Meta-regression analysis of the treatment effect of cardiac rehabilitation on all-cause mortality over time in patients with coronary heart disease. The area of each data point is inversely related to the standard error of log relative risk (RR). The absence of an improvement in the effect of cardiac rehabilitation on all-cause mortality over the past 2–3 decades might reflect the evolution of usual care and the introduction of life-saving therapies, including thrombolysis and secondary prevention drugs.

Fig. 3. Global incidence of ischaemic heart disease and availability of cardiac rehabilitation.

a | Age-standardized incidence of ischaemic heart disease. b | Total number of cardiac rehabilitation (CR) programmes per country. CR is available in only approximately half of the countries of the world and, in broad terms, the geographical distribution of CR is negatively correlated with the incidence of ischaemic heart disease. Data from ref..