shock
1shock
noun \ˈshäk\Definition of SHOCK
Origin of SHOCK
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2shock
transitive verb3shock
noun, often attributiveDefinition of SHOCK
Origin of SHOCK
4shock
verbDefinition of SHOCK
transitive verbFirst Known Use of SHOCK
5shock
adjectiveDefinition of SHOCK
Origin of SHOCK
6shock
nounDefinition of SHOCK
First Known Use of SHOCK
shock
noun (Concise Encyclopedia)State in which the circulatory system fails to supply enough blood to peripheral tissues to meet basic requirements. Symptomsweak, rapid pulse; low blood pressure; and cold, sweaty skinare not all present in every case. Causes include low blood volume, caused by bleeding or fluid loss from burns or dehydration; inability of the heart to pump enough blood, due to heart attack, pulmonary embolism, or cardiac tamponade (compression of the heart by fluid in the membrane around it); and blood-vessel dilation as a result of septicemia, allergy (including anaphylaxis), or drugs. All result in reduced capillary blood flow; reflexes increase heart rate and constrict small blood vessels to protect the blood supply to essential organs. Without treatment of the underlying cause, these mechanisms fail; since the cause is not always clear, cases tend to require different and occasionally contradictory treatment (e.g., intravenous fluids can save the life of a patient with massive blood loss but can overload a weakened heart).
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