7th February 2024

A 43-year-old female presents to the acute medical unit with double vision and shortness of breath.

A 43-year-old female presents to the acute medical unit with double vision and shortness of breath. Her double vision is worse at night and occurs in all directions. Her husband also noted dropping her eyelids, which is worse in the evening. She states that her symptoms in the morning are better. EMG examination shows reduced muscle action potential stimulation with repeated nerve stimulation. 

Given the underlying diagnosis, which of the following spirometry findings is expected if a respiratory component is found?