Syncope - Differential Diagnosis Framework
Reflex Syncope:
• Vasovagal: Prolonged standing, Stress, Pain
• Situational: Coughing, Sneezing, Micturition, Defecation, Post-exercise
• Carotid sinus: hypersensitivity
Orthostatic Syncope:
• Volume Depletion
• Medication Effect: a-blockers, antidepressants, antipsychotics
• Autonomic Failure: Parkinson's, Diabetes, Alcoholism, Amyloidosis, Multiple System Atrophy
Cardiogenic Syncope:
• Bradyarrhythmias: Sinus bradycardia, Sinus pauses, AV block
• Tachyarrhythmias: Ventricular
• Mechanical: Aortic stenosis, HOCM, PE
Syncope Mimics:
• Seizure
• "Cerebrovascular Syncope": Vertebrobasilar insufficiency, Subclavian steal syndrome
• Alcohol "blackout"
• Sedation
• Psychogenic pseudosyncope
SCVMC Internal Medicine @SCVMCMed
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