---
title: A 6 week old infant is brought to the ED by ambulance for lethargy
description: It's Lethargy Quiz Time with Med-Challenger!
---

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# [A 6 week old infant is brought to the ED by ambulance for lethargy](https://challengercme.com/blog/a-6-week-old-infant-is-brought-to-the-ed-by-ambulance-for-lethargy)

 Written by [Med-Challenger](https://challengercme.com/blog/author/med-challenger) | Feb 7, 2025 3:00:11 PM

A 6 week old infant is brought to the ED by ambulance for lethargy. She is pale appearing and minimally responsive. VS: T 37°C  HR 270 RR 70 BP 58/32 and SpO2 94% on RA. 

The following rhythm strip is obtained:

*ECG courtesy of Dr. Rebekah Burns*

She already received 2 doses of IV adenosine en route to the ED. Which of the following is the next best step?

- Obtain a fingerstick glucose level
- Administer an isotonic fluid bolus
- Immediately start cardiopulmonary resuscitation
- Perform synchronized cardioversion

 

This question appears in [Med-Challenger Pediatric Emergency Medicine 3rd Edition Exam Review with CME](https://challengercme.com/pediatric-emergency-medicine-3rd-edition)

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<https://challengercme.com/pediatric-emergency-medicine-3rd-edition>

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