Definition of Shock:

Shock is a life-threatening condition that occurs when the body is not getting enough blood flow. This can damage multiple organs. Shock requires immediate medical treatment and can get worse very rapidly.

Considerations:

Major classes of shock include:

• Cardiogenic shock (associated with heart problems)
• Hypovolemic shock (caused by inadequate blood volume)
• Anaphylactic shock (caused by allergic reaction)
• Septic shock (associated with infections)
• Neurogenic shock (caused by damage to the nervous system)

Causes:

Shock can be caused by any condition that reduces blood flow, including:

• Heart problems (such as heart attack or heart failure)
• Low blood volume (as with heavy bleeding or dehydration)
• Changes in blood vessels (as with infection or severe allergic reactions)
• Certain medications that significantly reduce heart function or blood pressure

Shock is often associated with heavy external or internal bleeding from a serious injury. Spinal injuries can also cause shock.

Toxic shock syndrome is an example of a type of shock from an infection.