High cardiac output & low peripheral resistance shock
**Core Concept**
High cardiac output shock, also known as hyperdynamic shock, is characterized by an increased cardiac output and a decreased peripheral vascular resistance. This condition often results from an excessive release of vasodilatory mediators, leading to a decrease in systemic vascular resistance.
**Why the Correct Answer is Right**
In high cardiac output shock, the body attempts to compensate for the decreased peripheral resistance by increasing cardiac output. This is often seen in conditions such as sepsis, where the release of cytokines and other mediators leads to vasodilation and a subsequent increase in cardiac output. The increased cardiac output helps to maintain adequate perfusion of vital organs.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because high cardiac output shock is not typically associated with a decrease in cardiac output. Instead, cardiac output is increased in an attempt to compensate for the decreased peripheral resistance.
**Option B:** This option is incorrect because distributive shock is a broader category that includes high cardiac output shock, but also includes other types of shock such as anaphylactic shock and neurogenic shock. High cardiac output shock is a specific type of distributive shock.
**Option C:** This option is incorrect because cardiogenic shock is characterized by a decrease in cardiac output, not an increase. This type of shock is often seen in conditions such as myocardial infarction.
**Option D:** This option is incorrect because hypovolemic shock is characterized by a decrease in cardiac output due to a decrease in intravascular volume.
**Clinical Pearl / High-Yield Fact**
High cardiac output shock can be remembered by the "4 C's": Cardiac output is increased, Cardiac index is elevated, Cytokines are released, and Catecholamines may be decreased.
**Correct Answer:**. Anaphylactic shock