UKMLA PLAB AMC USMLE Prometric MCQ

Question Number 0672
Question:
A 64 year white man presented with progressive (over 4 months) gait disturbance and a more recent history of psychosis. He did not have urinary incontinence. Metabolic studies were all normal. A cranial CT scan revealed mild cerebral atrophy and grossly dilated ventricles. Lumbar puncture revealed a normal CSF pressure and no abnormal cells, protein or glucose. A radionuclide cisternogram showed persistent ventricular activity at 48 hours A likely diagnosis is

a) carotid sinus hypersensitivity
b) sick sinus syndrome
c) vasovagal episode
d) tricyclic antidepressants
e) normal pressure hydrocephalus