An angiogram is a very effective screening method we use to diagnose narrowed or blocked arteries. If narrowed or blocked arteries are found an angioplasty will most likely be scheduled. Angioplasty involves inserting a thin catheter into the artery, using x-ray to guide it to the narrowed or blocked location. We insert a tiny balloon and inflate it to stretch open the vessel. Once it’s open, we insert the stent, a tiny mesh tube, to support the vessel walls.