The difference between pulmonary embolism and cardiac embolism lies in the differences in causes, symptoms, and treatment options. 1. Etiology: Pulmonary embolism is caused by blockage of the pulmonary artery and its branches and insufficient blood supply to the lung tissue. Thromboembolism, air embolism, and cardiac redundancy are the main causes of thromboembolism. The most common of these is thromboembolism due to deep vein vasculitis. Cardiac embolism is mainly caused by dislodgment of blood clots in the heart or embolism of coronary arteries. 2. Symptoms: Pulmonary embolism can lead to dyspnea, severe chest pain, hemoptysis and so on. The main symptoms of cardiac embolism are chest tightness, shortness of breath, swelling and pain in the limbs, and red or purple skin. 3 Treatment Options: Pulmonary embolism can be treated by surgical thrombectomy or percutaneous catheter intervention, etc. Cardiac embolism can first choose drugs for thrombolysis, and when the effect is not good, it can be treated by open-heart surgery. Patients suffering from pulmonary embolism and cardiac embolism should go to the hospital in time to confirm the diagnosis, under the guidance of the doctor for standardized treatment.