( ( ( When ( ( a ( main ( pulmonary artery ) ) ) ( arises ( from ( the truncus ) ) ) ) ) ( , ( ( ( the ( blood flow ) ) ( through ( the lungs ) ) ) ( is excessive ) ) ) ) ( , ( ( systemic ( oxygen saturation ) ) ( ( ( ( is high ) and ) ( left ( heart ( is overloaded ) ) ) ) . ) ) ) )
(ROOT (S (S (SBAR (WHADVP (WRB When)) (S (NP (DT a) (JJ main) (JJ pulmonary) (NN artery)) (VP (VBZ arises) (PP (IN from) (NP (DT the) (NNS truncus)))))) (, ,) (NP (NP (DT the) (NN blood) (NN flow)) (PP (IN through) (NP (DT the) (NNS lungs)))) (VP (VBZ is) (ADJP (JJ excessive)))) (, ,) (NP (JJ systemic) (NN oxygen) (NN saturation)) (VP (VP (VBZ is) (ADJP (JJ high))) (CC and) (VP (VBD left) (SBAR (S (NP (NN heart)) (VP (VBZ is) (VP (VBN overloaded))))))) (. .)))
When a main pulmonary artery arises from the truncus, the blood flow through the lungs is excessive, systemic oxygen saturation is high and left heart is overloaded.
(ROOT (S (SBAR (IN After) (S (NP (NP (DT the) (NN blood)) (PP (IN in) (NP (DT the) (JJ pulmonary) (NNS capillaries)))) (VP (VBZ becomes) (VP (VBN saturated) (PP (IN with) (NP (NN oxygen))))))) (, ,) (NP (PRP it)) (VP (VBZ leaves) (NP (NP (DT the) (NNS lungs) (CC and) (NNS travels)) (PP (TO to) (NP (DT the) (NN heart))))) (. .)))