In the Emergency Department, the patient was started on Nipride initially and then was switched to nitroglycerin.
 The patient has heart disease
(ROOT (S (PP (IN In) (NP (DT the) (NNP Emergency) (NNP Department))) (, ,) (NP (DT the) (NN patient)) (VP (VP (VBD was) (VP (VBN started) (PP (IN on) (NP (NNP Nipride))) (ADVP (RB initially)))) (CC and) (S (ADVP (RB then)) (VP (VBD was) (VP (VBN switched) (PP (TO to) (NP (NN nitroglycerin))))))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ has) (NP (NN heart) (NN disease)))))
( ( In ( the ( Emergency Department ) ) ) ( , ( ( the patient ) ( ( ( ( was ( ( started ( on Nipride ) ) initially ) ) and ) ( then ( was ( switched ( to nitroglycerin ) ) ) ) ) . ) ) ) )
( ( The patient ) ( has ( heart disease ) ) )