Syncope

Sudden, spontaneous loss of consciousness and postural tone with rapid, complete, and spontaneous recovery

patho-physio

• transient global cerebral hypoperfusion

Causes

• Reflex (natural causes of syncope)

  • Vasovagal reflex from standing pain
  • Situational like defectation excercise
  • Carotid sinus hypersenstivity

• Orthostatic [low bp on standing 0- 20 mm/Hg systolic, and at least 10 mm/Hg diastolic]

• Alpha blockers
• benzos
• anti-deprsseors
• loss of atoncity
• Cardiac
  • Dysrhythmias
  • mechanical
    • Hypertrophic cardiomyopathy
    • Aortic stenosis
    • Severe pulmonic stenosis
    • Acute myocardial infarction/ischemia
    • Cardiac masses (e.g., atrial myxoma)
    • Pericardial tamponade
    • Prosthetic valve dysfunction
• 

DXD

MNg