Do not confuse with spinal shock
Diagnosis of exclusion
Never presume hypotension in trauma patient is due to<unk> 
Injury to cervical or thoracic vertebrae causes peripheral sympathetic denervation
Above T1:  full sympathetic denervation
T1-L3:  Partial sympathetic denervation
Below L4:  no sympathetic denervation
Lasts 1-3 week
Never presume hypotension in trauma patient is due to<unk> 
Above T1:  full sympathetic denervation
T1-L3:  Partial sympathetic denervation
Below L4:  no sympathetic denervation
Neurogenic shock
Cardiogenic
Spinal shock
Acute valvular Regurgitation/VSD
Undifferentiated shock 
CHF
Undifferentiated shock
Dysrhythmia