A 2-year-old presents with 3 days of high fever, irritability, and poor feeding. Examination reveals HR 180/min, RR 60/min, capillary refill 4 seconds, cool peripheries, and BP 55/30 mmHg. Lung fields are clear. He does not improve after two 10 mL/kg NS boluses. Urgent bedside echo shows markedly reduced left ventricular function. Which inotrope/vasopressor combination is MOST appropriate for this presentation?

• A Dopamine 10–20 mcg/kg/min
• B Norepinephrine + dobutamine
• C Milrinone 0.5 mcg/kg/min
• D Epinephrine 0.05–0.3 mcg/kg/min ✓

Explanation

This child has cold/warm-fluid-refractory septic shock with evidence of severely impaired cardiac function on echo, likely sepsis-induced myocardial dysfunction. In fluid-refractory dopamine-resistant shock with low cardiac output, epinephrine is the vasoactive agent of choice per PALS and pediatric Surviving Sepsis guidelines; it provides both inotropic (beta-1) and vasopressor (alpha) support. Dopamine at high doses may worsen tachycardia and has unpredictable receptor effects. Norepinephrine+dobutamine is used in warm (vasodilatory) shock; this child has cold shock with reduced LV function, making epinephrine more appropriate. Milrinone is a phosphodiesterase-III inhibitor suitable for low-output states after cardiac surgery but is not first-line in septic shock because it causes vasodilation and can worsen hypotension.

Reference: Ghai Essential Pediatrics, 10th ed.

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Written and medically reviewed by the StethoPrep medical team.