Shock and heart failure · Physiology

Which compensatory mechanism initially helps maintain cardiac output in heart failure?

  1. Reduced sympathetic tone
  2. Renin-angiotensin activation
  3. Decreased circulating blood volume
  4. Widespread arterial vasodilation
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Correct answer: Renin-angiotensin activation

The renin-angiotensin system increases blood volume and vasoconstriction. This helps maintain blood pressure and perfusion.

Difficulty: Medium Question 14 of 20

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