Acute myocardial infarction is necrosis of any myocardial mass due to ischemia. COVID-19 can be complicated by thrombosis and myocardial damage, which can lead to the deployment of a clinical picture similar to acute myocardial infarction. The material of this article is presented on the example of a clinical case. A woman aged 37 was diagnosed with an acute myocardial infarction, which later turned out to be a manifestation of a complicated course of coronavirus COVID-19 infection. This case drew attention to the absence of a clinical picture specific to this infection in the form of a damage to the respiratory system or intoxication. The case is also distinguished by the presence of a single uncharacteristic clinical manifestation of COVID-19 in the form of a cardiovascular event with elevations of the ST segment on the cardiogram and other objective data and additional research methods characteristic of acute myocardial infarction. The work also analyzed the pathogenetic mechanisms of acute myocardial infarction and cardiovascular complications of COVID-19, examined the general links of pathogenesis of these two pathological units and analyzed the causes of difficulties in their differential diagnosis. In this regard, there are unquestionably complications of differential diagnosis and the prescription of timely correct therapy. A deeper understanding of these data may improve the algorithms for diagnosing acute myocardial infarction and cardiovascular complications of COVID-19.