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Obstructive shock is a form of shock associated with physical obstruction of the great vessels or the heart itself.

In obstructive shock, cardiac output is decreased, central venous pressure and systemic vascular resistance is elevated and pulmonary artery occlusion pressure is increased, all of which are similar to cardiogenic shock. Obstructive shock can most easily be differentiated from cardiogenic shock by considering the greater clinical picture in the context of an physical obstruction which limits flow through the pulmonary artery.

Causes

  • Cardiac tamponade
  • Constrictive pericarditis (late stage)
  • Aortic stenosis
  • Tension pneumothorax
  • Massive pulmonary embolism
  • Anterior mediastinal mass
   

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