Cardiac tricuspid regurgitation is a structural abnormality of the heart in which some abnormal reverse blood flow occurs at the tricuspid valve orifice when the valve should be closed. The tricuspid valve of the heart is a valve located between the right atrium and the right ventricle. Normally, during systole of the heart whether it is the mitral valve between the left atrium and the left ventricle or the tricuspid valve between the right atrium and the right ventricle is going to be closed and there is no blood flow through it. If, during systole, the cardiac ultrasound detects abnormal blood flow from the ventricles to the atria through these two valve openings, it is called mitral tricuspid regurgitation. Tricuspid regurgitation is a type of valve disease, and the usual causes are primary valve damage and secondary closure insufficiency, such as age-related degenerative valve damage for the primary, and secondary, which is common in diseases that cause the heart to enlarge, such as chronic obstructive pulmonary disease (COPD). Regardless of the cause of tricuspid regurgitation, usually, mild regurgitation has no effect on heart function and does not need to go for special treatment, but if moderate to severe regurgitation occurs, it may have an effect on heart function and should be treated promptly.