Suzy covered it in the ESC party if you want to see it its in here

WTWAT RTP just confirmed Salvador heart transplant problems. He will miss the first two rehearsals due to his health and his sister will perform instead on the said rehearsals. He will only fly to Kiev 2 days before the semi so he can attend the jury rehearsal. He will me the meet-and-greet and the press conferences as well which his sister will go instead as well.

here is the RTP interview where they say he has heart problems and will miss the rehearsals here at 2:30 ''Salvador tem problemas de coração e voará para Kiev apenas dois dias antes da semi final'' (Salvador has heart problems and will fly to Kiev only two days before the semi final)