Venous blood flowing through the lungs is transported from the left ventricle through the left atrium through the aorta and throughout the body. When the left ventricle contracts, arterial blood is supplied to the aorta, and the mitral valve must be closed to prevent regurgitation to the ventricle. Mitral regurgitation (MR) is a phenomenon in which arterial blood flows back because the mitral valve is not completely closed due to external factors or aging.

Tricuspid regurgitation (TR) is one of the heart valve diseases. During the systolic phase of the right ventricle, three leaflets meet each other and during the process of closing the valve opening, a space is created due to incomplete closure, which causes blood to flow from the right ventricle back to the right atrium.

Recently, in China, a method of RF ablation in which the myocardium is resected using a radiofrequency electrode through a needle penetrating the heart into a thickened myocardium was introduced for the first time in the world. The results of the study are incredibly good, and the article was published in JACC, the most authoritative journal in the field of cardiology in 2018.