Patient in dental chair has slow and high breath what is this condition.. Cardiac disease

Patient in dental chair has slow and high breath what is this condition:

a. Hypoventilation

b. Hyperventilation

c. Cardiac disease ***

hypoventilating is breathing slow and shallow... not breathing enough... not blowing off enough CO2 

hyperventilating is breathing too fast and rapidly... makes you blow off too much CO2

In cardiac disease their will be shortness of breath which known as dyspnea were you find breath faster and shallower breath.