That's the first article that shows for googling [covid-19 vascular disease].
Basically my understanding of the current understanding is that COVID-19 is better thought of as a disease that can cause blood clots, particularly in several organ systems, particularly in the lungs -- you start getting blood clots in your lungs and consequently can't breathe very well.
Early days yet, but medical professionals are seeing cases of myocarditis that appears to follow COVID. Whether or not this leads to ling-term damage is unknown, but myocarditis isn't generally something you ignore.
Wow, sounds pretty serious. I experienced some of those symptoms in March after a particularly bad respiratory infection. Perhaps it's time to get an antibody test.