Absolute risk reduction (ARR) =
EER - CER (experimental group event rate - control)
Absolute risk (AR) = event rate =
Pts w event in group/total # of pts in group
Number needed to treat (NNT) =
1/ARR
Relative risk reduction (RRR) =
EER/CER
Chronic cough -r/o
Smoking, ACEI, do a CXR
Chr cough - not smoker, not on ACEI, CXR-N
DDx
Chr cough - not smoker, not on ACEI, CXR-N
Tx
In order:
Signs of upper airway cough sy (post-nasal drip)
SAH - preferred investigation
- after: MRI
Clinical presentation of SAH
Sudden onset unprovoked Headache w neck stiffness & n/v
Prodromal signs and syx in SAH
Syx: headache, dizziness, orbital pain, diplopia, visual loss
Signs: sensory or motor disturbance, seizure, ptosis, bruit, dysphagia
Prodromal signs/syx in SAH are 2ry to:
Headache most typical DDx in young vs old
Young: some form of migraine
Old: SAH, GCA, met to the brain, SDH if on Warfarin until proven otherwise
Migraine clinical presentation
Family Hx 96% Pulsating, worse w activity Causes gastroparesis: n/v Mild to severe, can be disabling Hx of motion sickness \+/- photo- and phonofobia
Migraine adjunctive Tx
Metoclopride taken it causes gastroparesis (all therapies are more effective)
Migraine trigeminal variant
Recurrent sinus h/a, involving the trigeminal nerve distribution, BILATERALLY!
Idiopathic acute neuro sensory hearing loss (N structural exam)
Tx
Prednisone po x10d Otological referral ?Mg No benefits from acyclovir If no response, intra-tympanic steroids
PVD useful physical signs
Absent pulses -spec 90%, LR+9-44
Femoral bruit -spec 95%, LR+5
Less helpful: cool skin, cap refill time
Triggers of RLS
Fe-deficiency
?VitD deficiency
Metoclopramide, antihistamines, neuroleptics
Multiple sensory deficits
Vague unsteadiness only w walking
Tactile input helps balancing
Dizziness DDx
Acute viral labyrinthitis
Vertigo, movement makes it worse, but than lasts for minutes (vs BPPV)
Tx: methylprednisone 100mg x3d, then taper over 22d (NEJM)
Vertigo w brainstem infarct
Vertical nystagmus - central cause!
Non-fatiguable
Older pt w atherosclerosis
+ other brainstem or cerebellar symptoms (dysarthria, dysmetria, diplopia, motor sy)
Vertigo DDx
BPPV
vestib neuronitis
Ménière’s disease (tinnitus, hearing loss, ear fullness, vertigo)
Central cause (15%)