Background: Myocardial infarction (MI) is distinguished by the necrosis of myocardial cells as a result of substantial and prolonged ischemia. Anxiety, problems sleeping, and feelings of depression are some of the most common psychosocial consequences of having a myocardial infarction. Aim: The purpose of this study is to evaluate the effects of post-myocardial infarction on patients' levels of anxiety, depression, and quality of sleep. Method: The collection of data from 94 individuals with MI was carried out according to a descriptive cross-sectional design. Sleep quality, depression, and anxiety were evaluated using standard questionnaires. Results: 69.1% of the participants reported having trouble getting quality sleep. The percentage of individuals suffering from depression who have a MI According to the PHQ-9 scale, 51.1% of the participants exhibited signs of mild depression, while 40% of the participants exhibited signs of moderate anxiety. Both of these results were based on the participants' responses on the GAD-7 scale. Conclusion: Patients who had recently suffered a myocardial infarction had poor sleep quality, and a substantial percentage of them also suffered from depression and anxiety.