The Impact of Audiovisual Structured Patient Education Material in Improving Clinical and Behavioural Outcomes in Home-Based Cardiac Rehabilitation Programme Participants

The goal of this clinical trial is to find out if newly developed, culturally adapted educational videos-sent through a mobile messaging app-can help people with coronary heart disease do better in a home-based cardiac rehabilitation program in Malaysia. The main questions it aims to answer are: * Do the educational videos help participants improve their fitness? * Do the videos help participants better understand heart health and stick to a healthy lifestyle? Researchers will compare the educational videos to existing standard educational materials to see if the video-based education is more helpful for supporting rehabilitation at home. Participants will: * Take part in a 12-week home-based cardiac rehabilitation program * Receive either educational videos or standard education materials * Meet with the cardiac rehabilitation team every 4 weeks * Complete a treadmill exercise test, blood tests, and questionnaires before and after the program.

Inclusion Criteria: * Diagnosed as any form of ischaemic heart disease; * Classified as low to moderate risk based on American Association of Cardiovascular and Pulmonary Rehabilitation (AACVPR) criteria through Exercise Stress Test (EST); * Cognitively intact and able to provide informed consent; * Literate and capable of utilising educational material; * Able to use and operate a smartphone with an exercise activity tracker (EAT). Exclusion Criteria \- Classified as high risk according to the American Association of Cardiovascular and Pulmonary Rehabilitation (AACVPR)