Support oxygenation without over-oxygenating, and control the ventilation rate.
Before you read
Test yourself first: 5 questions
Question 1 of 5
An adult regains a pulse after cardiac arrest but remains unresponsive. Which AEMT action best follows current post-cardiac arrest care?
Answer: A. After ROSC the goals are to avoid hypoxia and hyperoxia by titrating oxygen to about 92-98%, ventilate at a normal rate, avoid hypotension with fluid as needed, obtain a 12-lead and transport. Prolonged 100% oxygen risks hyperoxia injury, hyperventilation constricts cerebral vessels and lowers brain blood flow, and withholding ventilations in an unresponsive patient invites re-arrest.
Question 2 of 5
Immediately after return of spontaneous circulation, the priority is to:
Answer: A. The post-arrest brain is exquisitely sensitive to both hypoxia and hypocapnia, and hyperventilation constricts cerebral vessels at exactly the wrong moment. Supporting oxygenation and pressure while keeping the rate controlled is the whole of early post-arrest care.
Question 3 of 5
A drowning victim is pulseless and apneic after being pulled from the water. How does this arrest differ from a typical sudden cardiac arrest in adults?
Answer: A. Drowning arrests are driven by hypoxia, so providing breaths along with compressions early is critical; compression-only CPR is less appropriate. Most drowning victims are not in a shockable rhythm initially, although an AED should still be applied. Attempts to drain water waste time and increase aspiration risk, and spinal precautions are reserved for a mechanism such as diving.
Question 4 of 5
After return of spontaneous circulation the defibrillation pads are deliberately left attached because:
Answer: A. The post-arrest heart is stunned and electrically unstable, and a patient who re-arrests with the pads already on can be shocked in seconds instead of minutes. The pads play no part in displaying the rhythm — monitoring electrodes do that — so removing them buys tidiness at the cost of the next shock's delay.
Question 5 of 5
A 34-year-old postpartum woman has sudden pleuritic chest pain, a pulse of 128, respirations of 30, clear lung sounds and an SpO2 of 86% that barely rises on high-flow oxygen. Which AEMT plan is most appropriate?
Answer: A. Sudden pleuritic pain, tachycardia, tachypnea and hypoxia that resists oxygen in a postpartum patient with clear lungs strongly suggests pulmonary embolism. Field care is supportive: oxygen, access, monitoring, readiness for arrest and early transport to definitive care. Treating it as anxiety hyperventilation is dangerous, clear lungs argue against pulmonary edema, and a large bolus can overload a strained right ventricle.
Keep the streak going with more questions like these, each with a full rationale.
What is post-arrest care?
The recurring examinable error is treating ROSC as the finish line and then undoing it with hyperventilation or an unsupported blood pressure.
Key points to remember
- Support oxygenation without over-oxygenating, and control the ventilation rate.
- Hyperventilation drops CO2, constricts cerebral vessels and worsens the injury.
- Support blood pressure — the post-arrest heart is stunned and output is fragile.
- Obtain a 12-lead: a coronary occlusion may be the reason for the arrest.
Field priorities
- Rate discipline is as important after ROSC as during the arrest.
- Re-arrest is common — keep the pads on and keep monitoring.
Coaching the patient
- ROSC is the beginning of the resuscitation, not the end of it.
Red flags: act now
- A falling pressure after ROSC
- Ventilation rate creeping up under stress
Post-Arrest Care: FAQs
What are the priority actions for Post-Arrest Care in the field?
Rate discipline is as important after ROSC as during the arrest. Re-arrest is common — keep the pads on and keep monitoring.
What findings in Post-Arrest Care change your plan or your transport decision?
A falling pressure after ROSC. Ventilation rate creeping up under stress.
What do I need to know about Post-Arrest Care for the NREMT?
Support oxygenation without over-oxygenating, and control the ventilation rate. Hyperventilation drops CO2, constricts cerebral vessels and worsens the injury. Support blood pressure — the post-arrest heart is stunned and output is fragile. Obtain a 12-lead: a coronary occlusion may be the reason for the arrest.
What should the crew communicate or document for Post-Arrest Care?
ROSC is the beginning of the resuscitation, not the end of it.
