Pericardial effusion is not hereditary. Pericardial effusion is not a genetic disease, and the causes of pericardial effusion are often acquired factors. For example, tuberculosis infection can cause tuberculous pericarditis, leading to pericardial effusion. Symptoms often include unexplained low-grade fever, cough, and night sweats, with a PPD test often showing a rigid change. Pericardial effusion caused by heart failure often presents with repeated exertional dyspnea, accompanied by limb edema. Cardiac ultrasound often reveals changes in the heart structure, such as cardiac enlargement and reduced cardiac pumping function. Additionally, hypoalbuminemia and tumors can also cause pericardial effusion, but these factors are not related to genetics.