NURS 225 Chapter Notes - Chapter 34: Cardiogenic Shock, Vasodilation, Cardiac Output
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Such that there is inadequate filling of the vascular compartment. Acute loss of blood anywhere from 15% to 20% It can be due to an external loss of blood like a hemorrhage, plasma (severe burns), extracellular (severe dehydration or loss of gastrointestinal fluids with vomiting or diarrhea). It occurs when the heart fails to pump blood sufficiently to. About 10% of the total blood volume can be lost or removed without experiencing any adverse side effects. 25%, the stroke volume falls but arterial pressure is maintained because of sympathetic-mediated increases in heart rate and vasoconstriction. This vasoconstriction results in an increased diastolic pressure and narrow pulse pressure. The cardiac output is what generates blood pressure, and systemic vascular resistance. An increase in vascular resistance maintains mean arterial pressure for a short time despite decreased cardiac output. Cardiac output and tissue perfusion decrease before signs of hypotension appear. Then cardiac output and arterial pressure fall to zero when it"s about.
