Pulmonary embolism is also relatively common in clinical practice. Its precursors may include varying degrees of respiratory difficulty, chest tightness, and shortness of breath, among others. If such symptoms occur, medical attention should be sought promptly, primarily to rule out the possibility of acute myocardial infarction. Pulmonary artery CTA can further confirm whether there is a pulmonary embolism. In cases of extensive pulmonary embolism, there is a high risk of sudden death, and aggressive thrombolytic and anticoagulation treatments should be administered. If the patient's chest tightness and shortness of breath are relieved after the aforementioned treatments, hospitalization for observation and treatment is still necessary.