Do you typically pursue EMG/nerve conduction study in patients who already have a clinical diagnosis of myasthenia gravis?  

Depends on antibody status. If the patient is antibody positive (AchR or Musk) and has a classic presentation (e.g., Fatigable ocular and or bulbar weakness) and good response to first or second-line treatment (pyridostigmine, prednisone) then it’s probably not necessary. Seronegative patients...