1.   But whatever age, quality of life and survival are key to evaluating whether the angioplasty should be done.

2.   Also not surprising to the researchers was that the success rate of the procedure was greater among hospitals that did angioplasty more often.

3.   Angioplasties are done on about a million Americans each year, mostly as routine treatment for chest pain.

4.   Angioplasties are done on more than half a million Americans yearly, using balloon-tipped catheters to open clogged heart arteries.

5.   The heart association estimates that more than a million angioplasties are done each year nationwide.