He has had subsequent dyspnea on exertion which has recently worsened.
 The patient has congestive heart failure. 
(ROOT (S (NP (PRP He)) (VP (VBZ has) (VP (VBN had) (NP (NP (JJ subsequent) (NN dyspnea)) (PP (IN on) (NP (NP (NN exertion)) (SBAR (WHNP (WDT which)) (S (VP (VBZ has) (ADVP (RB recently)) (VP (VBN worsened)))))))))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ has) (NP (JJ congestive) (NN heart) (NN failure))) (. .)))
( He ( ( has ( had ( ( subsequent dyspnea ) ( on ( exertion ( which ( ( has recently ) worsened ) ) ) ) ) ) ) . ) )
( ( The patient ) ( ( has ( congestive ( heart failure ) ) ) . ) )