Abstract:Acute pulmonary embolism is a common acute cardiovascular disease in clinical practice. It can lead to respiratory and circulatory failure, with a poor prognosis for patients, and is one of the common causes of death in cardiovascular diseases. Electrocardiography (ECG) is a simple, fast, and low-cost examination, making it one of the most commonly used test in clinical settings. In recent years, numerous studies have shown that ECG not only has diagnostic value for acute pulmonary embolism but also provides certain prognostic value for assessing patient outcomes. Abnormalities such as ST segment elevation in lead aVR, T wave inversion in leads V2-V4, right bundle branch block, sinus tachycardia, S1Q3T3 pattern, fragmented QRS complex dynamics, a lower depth of the S wave in lead V5, and atrial fibrillation on the ECG can predict mortality outcomes and length of hospital stay.