Hubby has a bad heart... got his Moderna Booster and within

Hubby has a bad heart... got his Moderna Booster and within 3 days his heart got worse - could not walk down a hallway at home, put on his shoes, take a shower, get dressed, get the mail... was walking an hour a day and could not walk in his home... found out his heart was working at 26%... got a new pacemaker and defibrillator... been recovering since the beginning of 2022 from this surgery... he believes he has 6 or 7 more years on this earth... don't know what to think... still gets a bit dizzy after sitting down for a while... short of breath at times... but feeling stronger than before the surgery... Anyone else with similar experiences?

Also suffers from forgetting things from short term memory and long term memory... can't make decisions quickly anymore either...

@DizzyMom2022https://www.google.com/url?sa=t&source=web&rct=j&url=Congestive Heart Failure: Symptoms, Causes, Treatment, Types, Stages