This research confirms the importance of the cardiac educational program in improving the knowledge and adherence to healthy lifestyle. This research revealed that there was significant difference in the knowledge regarding early signs and symptoms and immediate treatment of myocardial infarction before and after planned teaching. It was evident that planned teaching significantly improves the knowledge regarding myocardial infarction. Thus this planned teaching programme was found to be effective in increasing the knowledge of the patients at high risk for myocardial infarction.The application of this research in practice may help improve the knowledge and the adherence to healthy lifestyle of patients with CAD. Conducting research exploring the effect of cardiac educational program on knowledge and adherence to healthy lifestyle among patients with CAD in India may provide a basis for conducting other studies which can address the gap and the limitations of the present research.