This compresses the plaque, enlarging the inner diameter of the blood vessel so blood can flow more easily. Then the balloon is deflated and catheters are withdrawn. In about 25 percent of the people who've had PTCA, the dilated part of the coronary artery re-narrows. This usually occurs within the first six months. Then a doctor must decide whether to repeat the operation or if open-heart surgery is a better choice.
High levels are a large factor in clogging arteries.
Your blood pressure is checked each time you donate and cholesterol levels are checked periodically.