Heart ring or stent is a small tube that plays an important role in overcoming the blockage of blood vessels in the heart. This tool is installed in a blocked blood vessel so that blood flow remains smooth. Installation of heart ring is usually done on patients with coronary heart disease or people who have blocked arteries due to plaque buildup. Generally, the buildup of plaque in blood vessels is caused by cholesterol or other substances attached to the walls of blood vessels. Heart Ring Installation Procedure In making a heart ring, the doctor will initially install a heart catheter. A catheter is inserted into a vein from the groin or arm. After the catheter has entered, a guide cable is then inserted to guide the balloon and ring to the problematic area. The balloon in a deflated state is placed on the outside of the guide cable and in the outer layer will be placed a ring or stent. Once inside, the balloon is expanded, so that the ring also expands. Thus, the arterial cav...