As far as I understand, you are saying that blood vessels are the cause of long COVID, but vascular disruption predispose to long term COVID. So it's more a feature of COVID(or other disease I guess?) than a feature of long term COVID specifically.

> Vascular disruption has been implicated in coronavirus disease 2019 (COVID-19) pathogenesis and may predispose to the neurological sequelae associated with long COVID, yet it is unclear how blood–brain barrier (BBB) function is affected in these conditions.