Syncope (DDx)

Pulmonary

1. PE

Cardiac

1. Structural
   1. Valvular heart disease
      1. AS
      2. Tricuspid stenosis
      3. Mitral stenosis
      4. Cardiomyopathy
   2. Pulmonary hypertension
   3. Myxoma
   4. Pericardial disease
   5. Aortic dissection
   6. PE
   7. Ischemia/infarction
2. Dysrhythmias
   1. Bradydysrhythmias
   2. Stokes-Adams attack
   3. Sinus node disease
   4. High degree AV block
   5. Pacemaker malfunction
   6. Tachydysrhythmias
   7. V-tach
   8. Torsades
   9. SVT
   10. A fib/flutter

Neural/Reflex-Mediated

1. Vasovagal
2. Situational
   1. Cough
   2. Micturition
   3. Defecation
   4. Swallow
   5. Neuralgia
3. Carotid sinus syndrome

Neurologic

1. TIA
2. Subclavian steal
3. Migraine
4. SAH

Source

Tintinalli