Affordable Cardiac Rehabilitation An Outreach Inter-Disciplinary Strategic Study (ACROSS) – Research Programme Protocol

Background The evidence and infrastructure needed to access and deliver cardiac rehabilitation (CR) services are absent or lacking in low and middle-income countries (LMICs), resulting in a substantial loss of potential health and socio-economic benefits. Home-based programmes provide an affordable model of delivery that can leverage a scalable increase in CR access in LMICs. ACROSS (Affordable Cardiac Rehabilitation: An Outreach Inter-disciplinary Strategic Study) seeks to co-develop (with patients, caregivers, clinicians, and service commissioners) a culturally and contextually applicable and affordable home-based programme for people with the multimorbidity of coronary heart disease and/or heart failure with co-existing depression and/or anxiety and evaluate the acceptability, clinical effectiveness, and cost-effectiveness of its implementation in Bangladesh, India, and Pakistan and to determine its scalability and sustainability. Methods Four linked work packages (WPs). WP1 (cultural adaptation/refinement of home-based rehabilitation): examine rehabilitation implementation barriers/enablers from multiple stakeholder perspectives and co-develop a feasible and acceptable culturally & contextually adapted home-based programme, extended to take account of co-existing depression and/or anxiety; WP2 (external pilot): assess feasibility/acceptability of the co-developed rehabilitation intervention and study design and processes necessary for a full-scale trial; WP3: (multicentre/multi-country hybrid effectiveness and implementation randomised trial) determine the clinical and cost-effectiveness of a culturally adapted home-based rehabilitation intervention for people with coronary heart disease and/or heart failure and depression and/or anxiety; WP4 (capacity building): build research and rehabilitation delivery capacity. Conclusions The ACROSS programme overarching goal is to develop a clinically and cost-effective CR model in low-resource settings for people in Bangladesh, India, and Pakistan with a multimorbidity of heart disease and depression and/or anxiety with the potential for substantial health and socio-economic benefits.