During the acute phase of a myocardial infarction, symptoms such as nausea and vomiting often occur, particularly with acute inferior wall myocardial infarction. In the later stages of acute myocardial infarction, including anterior and lateral wall infarctions, patients may experience poor diet, issues with medication, or poor food intake, leading to electrolyte disturbances, which can also result in symptoms of nausea and vomiting.

Therefore, nausea and vomiting during myocardial infarction are manifestations of gastrointestinal distress indirectly stimulated by the condition. Additionally, patients with acute right ventricular infarction may experience worsening right heart function, gastrointestinal tract water retention, and edema, which can also lead to nausea, vomiting, and decreased appetite.