Hello my father in icu after angioplasty on 27th June two stents were placed.he had water in his lungs which is now removed.but his blood pressure is low 53..he is in unconcious state they are giving him sedatives to keep in observation becuz his bp falling and becoming normal.so they decided to have sputum test to find any lung infection that causing his blood pressure low.they have taken samples on 30 June now today it was 1st July.lung infection can cause low 4bp.lung infection can lowbp