Although he suffered the warning stroke less than a week before The Celebrity Apprentice's third-season finale, Michaels still attended the live event, which ended with Donald Trump declaring him the competition's champion.
According to The AP, Michaels' procedure -- which is being performed by a surgical team at St. Joseph's Hospital and Medical Center in Phoenix-- involves a cardiac catheterization, in which doctors insert a catheter into a vein in the groin and direct wires and a closure device into the heart. Cameras are used to assist the doctors as they operate to patch the hole.
In order to maintain normal blood flow, the closure device will stay in Michaels' heart permanently.
The former Rock of Love and current Bret Michaels: Life As I Know It star would reportedly be at risk for developing new clots and suffering additional strokes if his blood flow wasn't corrected.