I have heart issues, initially from vaccine injury beginning two weeks after I got the Covid vaccine, but aggravated each time I've gotten Covid.

Mine was diagnosed at Mayo in Rochester as severe microvascular endothelial dysfunction. What that means is that my arteries don't reasons correctly to chemicals that are supposed to open up blood vessels - in my case, at least one of them causes the blood vessels to constrict rather than dilate. That means the tiny blood vessels in my heart close when they're supposed to open, depriving my heart of oxygen and causing heart attack symptoms. I haven't actually had a heart attack myself, but I know people who have.

Endothelial dysfunction can also cause the larger blood vessels to constrict, and that can cause severe pain and actual heart attacks (STEMI or NSTEMI). It is known that Covid affects the endothelial cells lining the arteries, which can cause microvascular dysfunction and/or coronary artery spasms. This often happens with no obstructions at all in the blood vessels (like you, my calcium score is zero) and is called INOCA (ischemia with non-obstructed coronary arteries) or ANOCA (angina with non-obstructed coronary arteries).

There are doctors at Mayo in Rochester who are doing research on these disorders, which have become a lot more common since Covid. I see Dr. Amir Lerman, who is really excellent, but he's not the only one who knows these disorders and is on the cutting edge of treatments.