ICU nurses don’t study ACLS. They run it. Twelve-hour shifts, codes that stack, rapid responses that turn into arrests, post-ROSC patients whose management is a master class in every part of the algorithm. You already know the content. What you need from a recertification is efficiency — and confirmation that you’re current on the 2025 guideline updates that actually change practice.

Here’s how to prioritize when you’re already clinically fluent.

What’s actually new in the 2025 guidelines:

• Epinephrine timing. For non-shockable rhythms, administer epinephrine as soon as possible. For shockable rhythms, give it after the first failed defibrillation attempt. This is slightly different from the prior “every 3–5 minutes” framing and worth knowing cold.
• Post-cardiac arrest care emphasis. The algorithm’s post-ROSC branch received more detail — targeted temperature management, respiratory parameters, blood pressure targets. This is the bulk of what ICU nurses manage after the arrest itself.
• Supraglottic airway guidance. Expanded discussion of supraglottic airway use in adult cardiac arrest. Most ICU nurses already know this from practice, but the certification exam will reflect the expanded language.
• Human factors and team dynamics. The 2025 guidelines explicitly emphasize human performance during resuscitation. Expect exam scenarios that test communication, closed-loop verification, and team-lead transitions.

The 2025 AHA and ILCOR updates weren’t a rewrite. They were refinements, but several changes directly affect how ICU codes are run:

Where ICU nurses lose points on the exam

Not on cardiac arrest. You run those. You lose points on the parts of the algorithm you don’t see as often:

• PEA with reversible causes. The H’s and T’s are on the exam more than they’re in your codes, because most of your PEA arrests have obvious reversibles that you address without running the mnemonic.
• Bradycardia management with atropine dosing and transcutaneous pacing thresholds. Most ICU codes are tachyarrhythmic or arrest-level; symptomatic bradycardia management is less frequent practice.
• Specific drug dosing by weight. You know the drugs. The exam may test the exact mg/kg for a 70 kg patient, which is a different recall task.
• Neonatal and pediatric crossover questions. If you certify ACLS-only, the exam is adult-focused, but expect a handful of boundary cases.

How to use recertification as a sharpening tool

Skim the study guide for the 2025 update sections. Run through the algorithm diagrams once — your clinical memory will fill in the pattern. Spend your focused study time on the drug pharmacology tables and the bradycardia and asystole algorithms, because those are the sections most likely to deviate from your daily practice.

The exam itself takes most experienced ICU nurses 20 to 40 minutes. If you fail a question, you get unlimited retakes — another reason the “one hour” framing is realistic for clinicians who already run codes. You’re not trying to learn ACLS from scratch. You’re trying to document the fluency you already have.

Post-ROSC management and the 2025 guideline shift:

The 2025 guidelines deepened the focus on post-cardiac arrest care as a continuation of resuscitation. For ICU nurses, the practical changes worth knowing before the exam:

• Targeted temperature management parameters — including refined guidance on temperature targets and the duration of temperature control.
• Blood pressure targets in the first hours post-ROSC — specific MAP goals are reinforced.
• Respiratory parameters — the 2025 updates emphasize avoiding hyperoxia and hypocapnia, with specific SpO2 and PaCO2 targets.
• Neurological prognostication timing — earlier than 72 hours is discouraged; multimodal assessment is emphasized.

Most ICU nurses are already running this playbook. The exam will test whether you can articulate the parameters, not just execute them. Spend ten minutes reviewing the specific numbers before you sit for the test.

Team dynamics and what the exam is really asking

The 2025 guidelines put explicit emphasis on human performance — closed-loop communication, clear role designation, team-lead handoffs. Expect exam scenarios that aren’t purely clinical but test whether you recognize a breakdown in team dynamics. If you’ve led a code, you’ve seen this play out live. The exam frames it in ACLS vocabulary; your clinical experience fills in the rest.

Documentation habits that save time at recertification

Two minutes of work now saves an hour in two years. When you complete recertification, save the digital certificate PDF, the credit statement, and a screenshot of the verification portal confirming your certification is active. Tag the files with the expiration year. At your next recertification cycle, everything you need for HR is in one folder — no hunting, no waiting on the issuer to reissue documentation.

Why speed matters for your license, your schedule, and your sanity

ICU schedules don’t accommodate full-day AHA courses. Your unit needs you on the floor. Your family needs you home. An online recertification that takes under an hour respects your reality and still produces a verifiable, hospital-accepted card.

ACI’s ACLS recertification is built for practicing clinicians — Board-Certified physician-designed, current on 2025 ILCOR and AHA guidelines, and priced at $109 for recertification with unlimited retakes. Your certificate is issued digitally on completion and valid for two years.

You already know the medicine. Get the paperwork to match.

Start your ACLS recertification here — built by physicians for clinicians who already run codes.