What are the possible complications of a leg angioplasty on a 90 year old?

See my previous post: Possible complications are: acute renal failure (usually in people with pre-existing kidney disease), heart attack, heart failure and bleeding - these are the serious complications. A lump at the site of catheter insertion which is discolored, swollen, and sore for a few days or week or two is common but not serious. Procedure failure with loss of the leg is also possible.

Angioplasty: embolism below the point of angioplasty, blood vessel occlusion, rupture, bleeding, hematoma