Ken Best of my RN knowledge recall (retired)-TIA (Transient Ischemic Attack) is a little different than a mini-stroke. Strokes are either 1) a clot blocks a brain artery causing a lack of blood supply to that area of the brain thereby causing some brain damage or 2) a bleed into the a brain area causing that part of the brain damage. A TIA is just that, a transient lack of blood supply(ischemic) that passes on so to speak. My father had TIAs - not causing any brain cell death. Better to have a TIA than a stroke. I doubt that your father's TIA was related to his PD. Nice to read your postings. Mary CG for Mel 76/11 - Mary RN MN, retired