Swelling of the lower extremities in heart disease is mainly a symptom of right heart failure, which leads to stasis of the body circulation. Firstly, edema in the low hanging parts of the body, mostly in the lower extremities, and secondly, as right heart failure gradually worsens, symptoms of stasis in the gastrointestinal tract and liver enlargement may occur, and patients may exhibit anorexia, poor appetite, nausea, vomiting, etc. As a result of right heart failure, the pressure on the return blood volume increases and the patient may show jugular vein anger or positive hepatic jugular venous reflux sign. Right heart failure is mostly combined with left heart failure, which is mainly a symptom of heart failure caused by failure to diagnose and treat the patient’s heart disease or disease progression in time. Medications are mainly applied diuretics to improve the symptoms of sodium and water retention, as well as drugs to improve the prognosis of the heart muscle, such as metoprolol, valsartan and other drugs.