Why does right heart failure cause edema?

Edema caused by right heart failure is primarily due to increased pressure.

Right heart failure generally results from impaired systolic and diastolic functions of the right ventricle, leading to a series of symptoms because the cardiac output no longer meets the body's needs. When edema occurs due to right heart failure, it is usually because the failure increases venous pressure, preventing timely circulation of venous blood. This blood may accumulate in the tissue spaces over time and potentially leak through the vessel walls into surrounding tissues, resulting in edema. Additionally, during right heart failure, compensatory enlargement of the ventricular chamber may occur, exceeding the body's tolerance and also contributing to the development of edema.

Besides edema, some individuals may experience symptoms such as dyspnea, palpitations, decreased appetite, and abdominal distension. In cases of severe symptoms, prompt medical attention at a hospital is necessary. Patients should also adopt healthy lifestyle and dietary habits.