You get called on a consult in the ER. 50 y/o is on a plane going to his daughter's college soccer game. All of a sudden, on the plane, he finds it hard to speak -- his words sound slurred. Also, he is dizzy and sick to his stomach. When he gets up, he stumbles. In the ER, they got a head CT, which showed no acute bleed, but is blurry and full of motion artifact. You don't have any other history yet.
Lets work with what we have & then I'll ask a few questions:
Presenting compliant: disturbed speech & unsteady gait.
3 Steps: What's the problem? Where is the lesion? What caused the lesion?
The problem:
Is the "slurred speech" truely slurred i.e. dysarthria, or is it an expressive dysphasia? Is comprehension intact?
Is the unsteady gait due to a motor deficit or ataxia (cerebellar vs. sensory)?
Dizzyness was mentioned; is this vertigo, presyncope, ataxia or a nonspecific use of the word?
From the info it sounds like dysarthria with ataxia & vertigo.
Localization:
A brainstem lesion is most likely (test this with more history & a clinical exam), if there is no motor tract signs or motor cranial nerve signs I would assume a more lateral syndrome than medial.
Pathogenesis:
Sudden onset suggest vascular aetiology. 50 y.o. & low O2 tension are consistent with this.
sounds like Posterior circulation stroke so far. Cardioembolic lesions are top of the list.
DDx.
Cardioembolic: Atrial fibrillation, valvular lesions, aortic arch atheroma, mural thrombos (post MI), ASD/PFO (discussed)
Others: HTN, subclavian steal, brainstem cavernoma (haemorrhagic), vertebral artery dissection (discussed), Giant cell arteritis.
Time for some more history & exam:
Are the deficits presisting, has he had them before? did he have a headache a few days before (vasospasm after sentile bleed of SAH, I'm pushing my luck aren't I!!!).
Other neuro symptoms?
Vascular risk factors (HTN, Smoking, Lipid levels, family history)
Any drugs
Past medical history & current meds? & diet of course
Exam: speech, cranial, limbs & Gait. Just the results, we'll interpret.
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then: i'd do MRI FLAIR/diffusion, MRA, TOE with bubble, ESR, ECG & holter, Lipids & glucose.
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My next post will be shorter
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