Background Education for hospitalised patients is an important aspect of care for people who have an acute cardiovascular event. Objective To investigate the cardiovascular risk factor behaviours of patients together with their acute coronary syndrome (ACS) knowledge, attitudes and beliefs following admission to hospital for an acute myocardial infarction. Methods Patients diagnosed with an acute myocardial infarction participated in an observational study. Patients completed a questionnaire consisting of cardiovascular risk factor behaviour questions and the ACS Response Index prior to discharge and at follow-up 10 weeks later. Results Of the 135 participants enrolled, 114 (84%) completed follow-up, 70% were males; mean age was 63 (ᱱ.6) years. The median length of hospital stay was 3 days (IQR 1) and the time to follow-up after discharge was 10 weeks. Self-reported risk factor behaviours improved significantly for diet (p < 0.001) and smoking cessation (p = 0.023) following discharge. At discharge 39% of patients had inadequate knowledge of ACS symptoms. The ACS Response Index improved significantly after discharge for attitudes (p = 0.004) and beliefs (p = 0.008). Despite 85% of patients indicating they would attend cardiac rehabilitation only 30% had commenced a programme at follow-up. Conclusion Patients reported implementing a number of healthy lifestyle changes following discharge including smoking cessation and healthy eating. Attitudes and beliefs regarding ACS showed a significant improvement following discharge. More than one third of patients had inadequate knowledge at discharge, suggesting current education practices may not be meeting the needs of patients with a myocardial infarction.