He denies any lightheadedness, dizziness, palpitations, or chest pain.
 the patient does not have a cardiac arrhythmia. 
(ROOT (S (NP (PRP He)) (VP (VBZ denies) (NP (NP (DT any) (NN lightheadedness)) (, ,) (NP (NN dizziness)) (, ,) (NP (NP (NNS palpitations)) (, ,) (CC or) (NP (NN chest) (NN pain))))) (. .)))
(ROOT (S (NP (DT the) (NN patient)) (VP (VBZ does) (RB not) (VP (VB have) (NP (DT a) (JJ cardiac) (NN arrhythmia)))) (. .)))
( He ( ( denies ( ( ( ( ( any lightheadedness ) , ) dizziness ) , ) ( ( ( palpitations , ) or ) ( chest pain ) ) ) ) . ) )
( ( the patient ) ( ( ( does not ) ( have ( a ( cardiac arrhythmia ) ) ) ) . ) )