Cardiac arrest can destroy heart Muscle and the action subsequently may generate more turbulence in the chambers and more chance of clots forming and going to the brain. Strokes are two kinds . By Blocking or by Bleeding. Your medication has to balance consideration of Both. IF you have surgery for any reason, you will probably be taken off some of your medications. This can increase your risk of mortality. I had a Septic Gall Bladder removed during the worst of covid and my likelihood of survival was only 30% Nev