Typical ECG manifestations of right ventricular infarction include ST-segment elevation in leads II, III, aVF, V3R~V6R, and ST-segment depression in leads I and aVL, which should be analyzed comprehensively, and there is no so-called the most typical statement. Right ventricular infarction is usually caused by right coronary artery obstruction, and its electrocardiographic manifestations mainly include ST-segment elevation in lower wall leads such as leads II, III, and aVF, and the magnitude of ST-segment elevation in lead III is higher than that in lead II, and ST-segment depression occurs in the corresponding leads I and aVL. When right coronary artery infarction is suspected, an 18-lead ECG is also required, which may show ST-segment elevation of varying degrees in leads V3R to V6R, and if the patient’s coronary artery is of the right coronary artery dominant type, ST-segment elevation may occur in the posterior wall leads V7 to 9. It is not scientific to analyze the condition from a single auxiliary examination, and it is recommended to combine the symptoms, physical examination, troponin and other information for comprehensive analysis, and improve the cardiography as soon as possible, and if infarction is found, it is recommended to aggressively medication thrombolysis, such as urokinase, alteplase, or placement of vascular stent treatment.