What Changed in the ACLS Guidelines for 2025?
The 2025 ACLS algorithm updates didn’t overhaul the guidelines — they sharpened them. The updates double down on what the evidence consistently shows saves lives: earlier epinephrine in non-shockable rhythms, uncompromising CPR quality metrics, capnography as a standard tool, and structured team communication during a code.
If you’re recertifying in 2025, this is what the exam is built on. If you’re working a code, this is what works.
Key 2025 ACLS Algorithm Updates Every Provider Must Know
1. Epinephrine Timing Is Not Optional
Epinephrine administration timing is one of the most clinically significant updates in the current guidelines — and one of the most tested on the ACLS certification exam.
Non-shockable rhythms (PEA and asystole): Administer epinephrine as soon as feasible. Research is unambiguous — every minute of delay in epinephrine administration in PEA and asystole reduces survival probability.
Shockable rhythms (VF and pVT): Epinephrine is administered after the second defibrillation attempt. Defibrillation is the priority. Epinephrine follows.
Know the rhythm. Know the timing. They are not interchangeable.
2. High-Quality CPR: The Numbers That Define the Standard
High-performance CPR is the cornerstone of every ACLS algorithm. The metrics haven’t changed — because the evidence behind them hasn’t changed.
| Parameter | 2025 Standard |
| Compression Rate | 100–120 per minute |
| Compression Depth | At least 2 inches (5 cm), no more than 2.4 inches (6 cm) |
| Chest Recoil | Full recoil after every compression |
| Interruptions | Less than 10 seconds |
These aren’t targets to approximate. They’re the clinical floor. Compressions outside these parameters reduce coronary perfusion pressure and decrease the probability of ROSC.
High-quality CPR keeps the patient viable long enough for everything else in the algorithm to work.
3. Capnography Is Now the Standard — Not the Exception
Waveform capnography is no longer an advanced add-on. It is the 2025 standard for two critical functions:
Confirming endotracheal tube placement. ETT confirmation via waveform capnography is the most reliable method available. If ETCO₂ is not detected after intubation, the tube position must be verified immediately.
Monitoring CPR quality in real time.
- Target: Maintain ETCO₂ above 10 mmHg during resuscitation. Values consistently below this threshold indicate inadequate perfusion and should prompt immediate reassessment of CPR technique.
- ROSC indicator: A sudden spike in ETCO₂ to 35–40 mmHg is frequently the first objective sign of Return of Spontaneous Circulation — often before a pulse is palpable.
If you’re running a code without waveform capnography, you’re managing it with less information than the standard requires.
4. Team Dynamics and the Megacode: Leadership Is a Clinical Skill
Memorizing drug dosages and algorithms is necessary. It’s not sufficient.
The 2025 ACLS guidelines formally emphasize the Team Leader role as a distinct clinical function during cardiac arrest resuscitation. A megacode isn’t just a sequence of interventions — it’s a coordinated team response that breaks down without deliberate leadership.
The Team Leader’s responsibilities during a code:
- Assigns roles before the code begins or immediately upon arrival
- Monitors the algorithm while the team executes — not the other way around
- Closes the loop on communication — every order is confirmed, every task is acknowledged
- Calls and adjusts — rhythm checks, drug timing, airway decisions, ROSC assessment
Closed-loop communication isn’t a soft skill. In resuscitation, an unacknowledged order is an unexecuted order. The guidelines recognize this — and the ACLS exam tests it.
Why These Updates Matter for Your ACLS Recertification
Every algorithm, drug protocol, and team communication standard in ACI’s online ACLS certification course reflects the current 2020–2025 ILCOR and AHA guidelines detailed above. The exam is built on these updates. The credential you earn confirms you know them.
ACI’s course is accredited by the Postgraduate Institute for Medicine (PIM) and awards AMA PRA Category 1 Credits™, ANCC, ACPE, and ADA credits. Compliant with Joint Commission standards on resuscitation education. Accepted in all 50 states and internationally.
Frequently Asked Questions
What are the most important 2025 ACLS algorithm updates? The key updates in the 2020–2025 cycle focus on early epinephrine administration in non-shockable rhythms, strict high-quality CPR metrics, waveform capnography as a mandatory standard, and formalized Team Leader roles during cardiac arrest resuscitation.
When should epinephrine be given during ACLS? In non-shockable rhythms (PEA and asystole), epinephrine should be administered as soon as feasible — delays reduce survival. In shockable rhythms (VF and pVT), epinephrine is given after the second defibrillation attempt.
What is the target ETCO₂ during CPR? The 2025 ACLS standard targets ETCO₂ above 10 mmHg during resuscitation. A sudden rise to 35–40 mmHg is a strong indicator of ROSC.
Does ACI’s ACLS course cover the 2025 algorithm updates? Yes. ACI’s curriculum is built on the current 2020–2025 ILCOR and AHA guidelines. Every algorithm, drug protocol, and megacode scenario reflects the updated standards.
How long does it take to complete ACI’s ACLS recertification? As little as one hour. 100% online. Available 24/7 with no scheduled sessions or in-person requirements.
Is ACI ACLS certification accepted in all 50 states? Yes. ACI certifications are accepted in all 50 states and internationally.
ACLS recertification: $109. New certification: $149.
