29 results
Causes of Relative Bradycardia - Note the propensity for intracellular organisms.
Infectious: 
Legionella, Psittacosis, Q fever, Typhoid
Causes of Relative ... : ß-blockers, CNS ... #differential #diagnosis ... #infectiousdiseases ... #table #NonInfectious
Differential diagnoses for the neuro-ophthalmologic finding of diplopia.
Neoplastic: 
 • Intraorbital meningioma 
 • Pituitary adenoma
Differential diagnoses ... for the neuro-ophthalmologic ... Miller-Fisher syndrome ... #Differential #Diagnosis ... #Causes #Ophthalmology
Localizing Extraocular Movement Disorders
 • CN Ill (Oculomotor) Nerve Palsy 
 • CN IV (Trochlear) Nerve
Nerve Palsy • CN ... One-and-a-half Syndrome ... Skew Deviation Casey ... #Localization #ophthalmology ... #differential #diagnosis
Adie's Pupil
What? Unknown nature & benign
 • Regular and mildly dilated pupil (4-6mm);
 • Light-near dissociaton;
Holmes-Adie Syndrome ... females Differential Diagnosis ... dissociation • Other causes ... #Adies #Pupil #PhysicalExam ... #neurology #ophthalmology
Hypermagnesemia - Etiologies by Mechanism
Renal Failure 
Excessive Mg Administration 
 - Massive PO intake
- Tumor lysis syndrome ... #Differential #Diagnosis ... High #Magnesium #Table ... #Causes #Management
Hantavirus
Pathogen: Hantavirus - Rodents are the primary reservoir
Transmission:
 • Shed in the urine, feces, saliva of
Cardiopulmonary Syndrome ... +/- diarrhea Diagnosis ... #Hantavirus #diagnosis ... #management #treatment ... #microbiology #infectiousdiseases
Hyponatremia - Differential Diagnosis by Mechanism
Decr Blood Pressure (“Decr Effective Circulating Volume”) 
 - Volume depletion
- Differential Diagnosis ... - Cirrhosis Syndrome ... the lung) - CNS ... #Differential #Diagnosis ... #Table #Causes
Hordeolum vs Chalazion

Hordeolum (Stye):
 • Location: Most commonly found at or near an eyelash follicle
 •
eyelash follicle • Cause ... upper lid • Cause ... #Clinical #Diagnosis ... #Management #Ophthalmology ... Chalazion #Comparison #Table
Mydriasis and Miosis - Differential Diagnosis Framework

Causes of Mydriasis:
Dilated pupils (mydriasis) more than 7mm
 • Unilateral
- Differential Diagnosis ... Unilateral Mydriasis: CN ... Miosis: Horner's syndrome ... #differential #diagnosis ... #ophthalmology
Horner's Syndrome on Physical Exam

A 75yoF was referred in for facial swelling and eyelid changes 1
Horner's Syndrome ... consistent with a diagnosis ... experience, the cause ... clinical #video #ophthalmology ... #physicalexam #