Tricuspid valve regurgitation is generally caused by pulmonary hypertension, right ventricular enlargement, and tricuspid annulus dilation. Under normal circumstances, when blood is ejected from the right ventricle into the pulmonary artery, the tricuspid valve closes to prevent blood from flowing back into the right atrium. Tricuspid valve regurgitation occurs when the valve does not close tightly during this process, allowing some blood to flow back into the right atrium. As a result, during systole, blood flows back from the right ventricle into the right atrium, leading to significant enlargement of the right atrium, increased pressure, and impaired venous return. Due to the increased workload and compensatory hypertrophy of the right ventricle, patients are prone to right heart failure. Mild regurgitation may not require treatment and can be monitored with regular follow-ups.