He improved slightly with 1.9 L of IVF but then declined again and required initiation of Levophed.
 He remained stable after 1.9 L of IVF
(ROOT (S (NP (PRP He)) (VP (VP (VBD improved) (ADVP (RB slightly)) (PP (IN with) (NP (NP (CD 1.9) (NN L)) (PP (IN of) (NP (NN IVF)))))) (CC but) (PP (ADVP (RB then)) (UCP (VBD declined) (ADVP (RB again)) (CC and)) (VP (VBN required) (NP (NP (NN initiation)) (PP (IN of) (NP (NNP Levophed))))))) (. .)))
(ROOT (S (NP (PRP He)) (VP (VBD remained) (ADJP (JJ stable)) (PP (IN after) (NP (NP (CD 1.9) (NN L)) (PP (IN of) (NP (NN IVF))))))))
( He ( ( ( ( ( improved slightly ) ( with ( ( 1.9 L ) ( of IVF ) ) ) ) but ) ( ( then ( declined ( again and ) ) ) ( required ( initiation ( of Levophed ) ) ) ) ) . ) )
( He ( ( remained stable ) ( after ( ( 1.9 L ) ( of IVF ) ) ) ) )