He felt this was likely due to fluid overload but did not improve with dialysis.
 The patient has pulmonary edema. 
(ROOT (S (NP (PRP He)) (VP (VBD felt) (SBAR (S (NP (DT this)) (VP (VP (VBD was) (ADJP (RB likely) (JJ due) (PP (TO to) (NP (NN fluid) (NN overload))))) (CC but) (VP (VBD did) (RB not) (VP (VB improve) (PP (IN with) (NP (NN dialysis))))))))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ has) (NP (JJ pulmonary) (NN edema))) (. .)))
( He ( ( felt ( this ( ( ( was ( likely ( due ( to ( fluid overload ) ) ) ) ) but ) ( ( did not ) ( improve ( with dialysis ) ) ) ) ) ) . ) )
( ( The patient ) ( ( has ( pulmonary edema ) ) . ) )