A 48-year-old male is in cardiogenic shock. Vital signs are BP 80/40, P 110, R 24, SpO2 92%. How should you attempt to increase cardiac output?

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Multiple Choice

A 48-year-old male is in cardiogenic shock. Vital signs are BP 80/40, P 110, R 24, SpO2 92%. How should you attempt to increase cardiac output?

When the heart is failing, the amount of blood it can pump each beat—stroke volume—drops partly because it has to push against high resistance in the arteries. Reducing that resistance makes it easier for the weakened ventricle to eject blood, so stroke volume and overall cardiac output can rise. A vasodilator lowers systemic vascular resistance, thereby decreasing afterload and allowing more forward flow. In practice, this approach must be balanced with maintaining blood pressure, since lowering afterload can further drop BP in a patient who is already hypotensive. Often, once perfusion pressure is supported with inotropes or vasopressors, afterload reduction can be used to improve cardiac output more effectively.

When the heart is failing, the amount of blood it can pump each beat—stroke volume—drops partly because it has to push against high resistance in the arteries. Reducing that resistance makes it easier for the weakened ventricle to eject blood, so stroke volume and overall cardiac output can rise. A vasodilator lowers systemic vascular resistance, thereby decreasing afterload and allowing more forward flow.

In practice, this approach must be balanced with maintaining blood pressure, since lowering afterload can further drop BP in a patient who is already hypotensive. Often, once perfusion pressure is supported with inotropes or vasopressors, afterload reduction can be used to improve cardiac output more effectively.

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