A life-threatening condition that requires immediate medical intervention. It is characterized by reduced blood flow that may result in damage of multiple organs. Types of shock include cardiogenic, hemorrhagic, septic, anaphylactic, and traumatic shock.

A pathological condition manifested by failure to perfuse or oxygenate vital organs.

A profound hemodynamic and metabolic disturbance characterized by the failure of the circulatory system to maintain adequate perfusion of vital organs; causes inadequate delivery of nutrients and insufficient removal of cellular waste products to and from the tissues.

A serious medical condition in which there too little blood flows to the outer portions of the body, resulting in cold, sweaty skin; a weak pulse; irregular breathing; and dilated pupils. Shock can be caused by a loss of blood, severe heart problems, severe infections, allergic reactions, or drug overdoses.

Profoundly reduced blood flow that results in impaired tissue perfusion and possible end organ damage.

Shock happens when not enough blood and oxygen can get to your organs and tissues. It causes very low blood pressure and may be life-threatening. It often happens along with a serious injury. There are several kinds of shock. Hypovolemic shock happens when you lose a lot of blood or fluids. Causes include internal or external bleeding, dehydration, burns, and severe vomiting and/or diarrhea. Septic shock is caused by infections in the bloodstream. A severe allergic reaction can cause anaphylactic shock. An insect bite or sting might cause it. Cardiogenic shock happens when the heart cannot pump blood effectively. This may happen after a heart attack. Neurogenic shock is caused by damage to the nervous system. Symptoms of shock include: Confusion or lack of alertness; Loss of consciousness; Sudden and ongoing rapid heartbeat; Sweating; Pale skin; A weak pulse; Rapid breathing; Decreased or no urine output; Cool hands and feet. Shock is a life-threatening medical emergency and it is important to get help right away. Treatment of shock depends on the cause. NIH: National Heart, Lung, and Blood Institute

The state in which profound and widespread reduction of effective tissue perfusion leads first to reversible, and then if prolonged, to irreversible cellular injury.

Shock is a state of organ hypoperfusion with resultant cellular dysfunction and death. Mechanisms may involve decreased circulating volume, decreased cardiac output, and vasodilation, sometimes with shunting of blood to bypass capillary exchange beds. Symptoms include altered mental status, tachycardia, hypotension, and oliguria....

Shock, in physiology, failure of the circulatory system to supply sufficient blood to peripheral tissues to meet basic metabolic requirements for oxygen and nutrients and the incomplete removal of metabolic wastes from the affected tissues. Shock is usually caused by hemorrhage or overwhelming...