1.   By instigating a calcium deficiency inside the cells, the drugs cause muscles lining arterial walls to relax.

2.   However, this suggestion depends on the assumption that prostacyclin is continually produced by arterial wall to prevent platelet aggregation.

3.   True aneurysms with dilatation and thinning of the arterial wall, although uncommon, may be found especially in animals which have experienced repeated infection.

4.   A blood test revealed Winn had high levels of homocysteine, an amino acid that damages arterial walls if it concentrates in the blood.

5.   But there was enough damage that supports called stents were inserted in the arterial walls to guard against future collapse.

6.   Researchers report that it may be possible to identify areas prone to rupture by measuring temperature differences within the arterial wall.

7.   Some of the gas may be produced locally in arterial walls, but he suspects that it plays a secondary role.

8.   The balloon is then inflated to compress artery-clogging plaques against the arterial walls, which widens the opening and increases blood flow.

9.   High cholesterol often leads to plaques along the arterial walls, which then encourage blood clots that may lead to a heart attack or stroke.