Multisystem: Shock, Sepsis and Metabolic Syndromes · USMLE Step 1

A patient in hypovolemic shock receives a large saline infusion. Which parameter is expected to improve first?

  1. Cardiac output
  2. Systemic vascular resistance
  3. Left ventricular contractility
  4. Serum potassium
Show answer and explanation

Correct answer: Cardiac output

Volume resuscitation increases preload, improving cardiac output rapidly. Contractility and SVR changes occur later.

Difficulty: Medium Question 16 of 19

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