▁from ▁the ▁University ▁of ▁Zur ich ▁and ▁Harvard ▁Medical ▁School ▁considered ▁these ▁find ings ▁to ▁be ▁a ▁sign ▁of ▁a ▁general ▁end oth eli itis ▁in ▁different ▁org ans , ▁an ▁infl am mat ory ▁response ▁of ▁the ▁end oth el ium ▁to ▁the ▁in fection ▁that ▁can ▁lead ▁or ▁at ▁least ▁contribute ▁to ▁multi - organ ▁failure ▁in ▁Cov id - 1 9 ▁patients ▁with ▁com orb id ities ▁such ▁as ▁di ab etes ▁m ell it us , ▁hy pert ension ▁and ▁card i ov asc ular ▁disease . ▁ ▁History ▁In ▁ 1 9 5 8 ▁Tod d ▁demonstrated ▁that ▁end oth el ium ▁in ▁human ▁blood ▁vessels ▁have ▁f ibr in ol yt ic ▁activity . ▁ ▁See ▁also ▁ ▁References ▁ ▁External ▁links ▁▁ ▁, ▁" Cap ill aries , ▁non - fen estr ated ▁( EM , ▁Low )" ▁▁▁ ▁End oth el ium ▁and ▁infl amm ation ▁ ▁Pl ate let ▁Activ ation , ▁University ▁of ▁Washington ▁ ▁Category : Ang i ology ▁Category : T issues ▁( bi ology ) <0x0A> </s> ▁P T - 8 ▁or ▁variant , ▁may ▁refer ▁to : ▁ ▁Su k ho i ▁P T - 8 , ▁a ▁ 1 9 5 0 s ▁prototype ▁Soviet ▁f ighter - air craft ▁ ▁Cons olid ated ▁X PT - 8 ▁and ▁ ▁X PT - 8 A , ▁ 1 9 3 0 s ▁experimental ▁training ▁aircraft ▁power ed ▁by ▁Pack ard ▁DR - 9 8 0 ▁dies el ▁engines