1.   Analysts said one major drawback with using balloon angioplasty alone is that the plaque recurs, a problem known as restenosis.

2.   There is debate among cardiologists about when to use balloon angioplasty as compared to bypass surgery as compared to medications.

3.   By contrast, angioplasty can be used on narrower, curving arteries.

4.   On Saturday, doctors successfully opened up a coronary artery that had narrowed at two places using balloon angioplasty.