Distributive shock

[Ven0m]

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Distributive shock = systemic vasodilation (septic shock, anaphylactic shock, neurogenic shock).
CO is increased because of the decreased afterload.
Pulmonary capillary wedge pressure (an index of left atrial preload) is decreased.

1. How can CO be increased while preload (pulmonary capillary wedge pressure) is decreased? (or is PWCP decreased simply because was also vasodilated, not because of decreased blood flow through it?)

 

[placeboconspiracy]

I think you've answered your own question. For pressure to decrease, you can have vasodilation and no change in blood flow.