ILCOR Guidelines: What They Are and Why They Matter for Your Certification
The International Liaison Committee on Resuscitation (ILCOR) is the global scientific body that develops evidence-based recommendations for resuscitation care. These recommendations form the foundation for national guidelines, including those used in ACLS, BLS, and CPR certification programs.
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For health care professionals, including nurses, physicians, paramedics, EMTs, and allied health teams, ILCOR’s work directly shapes how resuscitation is taught, practiced, and evaluated. Even if you don’t interact with ILCOR directly, its guidance is built into the protocols you follow.
The 2025 Consensus on Science with Treatment Recommendations (CoSTR) update reflects the latest global review of resuscitation science. It informs training standards, influences certification requirements, and equips providers with the most current, evidence-based practices.
What is ILCOR?
The International Liaison Committee on Resuscitation is a global collaboration of resuscitation organizations, founded in 1992 to advance the science and practice of life-saving care. Its mission is to promote, evaluate, and share the best available evidence in resuscitation and to support its adoption worldwide. ILCOR brings together leading resuscitation councils from around the world, including organizations like the European Resuscitation Council and the Resuscitation Council of Asia, to review research and reach consensus on what works best.
While ILCOR’s guidelines are not binding, these evidence-based recommendation are used by national organizations such as the American Heart Association (AHA) to develop their own country-specific guidelines.
Those national guidelines are what ultimately shape ACLS, BLS, and CPR certification programs, meaning ILCOR’s work directly influences the training and standards American health care professionals rely on every day.
How ILCOR Develops Its Recommendations: The CoSTR Process
ILCOR’s recommendations are published through the Consensus on Science with Treatment Recommendations, a process designed to turn the latest research into clear, practical guidance for resuscitation care.
In the past, updates came in large batches every five years. Today, ILCOR uses a Continuous Evidence Evaluation (CEE) process, meaning research is reviewed on an ongoing basis and recommendations can be updated more frequently as new evidence emerges.
How the Evidence Is Reviewed
Each topic begins with a clearly defined research question using the PICOST framework:
- Population
- Intervention
- Comparator
- Outcome
- Study design
- Time frame
From there, ILCOR task forces evaluate the evidence using three types of reviews:
- Systematic Reviews (SysRev): Comprehensive, in-depth analysis of all available research on a topic
- Scoping Reviews (ScopRev): Broader reviews used to map existing evidence and identify gaps
- Evidence Updates (EvUps): Focused updates that incorporate newly published data
Once the evidence is gathered, it’s assessed using GRADE criteria (Grading of Recommendations, Assessment, Development, and Evaluation), which helps determine how strong and reliable the evidence is.
Based on that assessment, ILCOR issues recommendations with varying levels of strength:
- Strong recommendations – Clear evidence supports a specific approach
- Weak recommendations – Evidence is limited or mixed, requiring more clinical judgment
- Good practice statements – Guidance based on expert consensus when high-quality evidence is limited
This structured process ensures that ILCOR’s recommendations give health care professionals confidence in how and why guidance evolves over time.
ILCOR vs. National Guidelines: Understanding the Difference
One of the most common points of confusion is how ILCOR fits into the guidelines you actually use in practice. A simple way to think about it is:
ILCOR recommendations → national council guidelines → training standards → certification
ILCOR reviews the science and publishes evidence-based recommendations. From there, national organizations interpret that guidance and develop formal guidelines tailored to their region. Those guidelines are then used to shape training programs, which ultimately define what you learn and are tested on during certification.
How Recommendations Become Practice
National resuscitation councils don’t just copy ILCOR recommendations word for word. Instead, they evaluate the evidence through the lens of their own health systems, resources, and population needs.
If you hold an ACLS, BLS, or CPR certification, the content you’re trained on is already grounded in ILCOR-informed science. Even when you don’t see ILCOR referenced directly, its influence is built into the protocols, algorithms, and training standards you follow.
Key 2025 ILCOR Updates Every Health Care Professional Should Know
The 2025 ILCOR CoSTR update reflects ongoing refinements in both clinical care and how resuscitation is taught and practiced. While not every recommendation represents a major shift, together they highlight where the science is evolving and what matters most in real-world care.
Advanced Life Support (ALS) Updates
Several updates focus on improving decision-making and consistency during high-acuity events:
- Defibrillator pad placement: Updated guidance reinforces the importance of correct pad size, positioning, and orientation to ensure effective energy delivery. Small adjustments in placement can directly impact defibrillation success, especially in complex patient presentations.
- Vascular access during cardiac arrest: New evidence continues to compare intravenous (IV) and intraosseous (IO) access. While IV access is generally preferred when it can be established quickly, IO remains a reliable alternative when time or conditions make IV access difficult.
- Vasopressors and post-ROSC care: Recommendations continue to refine how vasopressors are used during and after resuscitation. The focus is on maintaining adequate perfusion and stable hemodynamics following return of spontaneous circulation (ROSC), rather than relying on a one-size-fits-all approach.
- Mechanical CPR devices: These devices are not recommended as a routine replacement for manual compressions. High-quality manual CPR remains the standard, though mechanical devices may still be useful in situations where consistent compressions are difficult to maintain or provider safety is a concern.
- Targeted temperature management: For comatose patients after cardiac arrest, guidance emphasizes avoiding hyperthermia by maintaining a target temperature of 37.5°C or lower. This reflects a shift toward controlled normothermia rather than aggressive cooling in many cases.
- Special causes of cardiac arrest: Updated considerations highlight the importance of identifying and managing reversible causes, including hyperkalemia and opioid toxicity. While standard resuscitation remains the priority, these scenarios may require targeted interventions alongside core ACLS protocols.
Basic Life Support (BLS) Updates
BLS updates continue to emphasize simplicity, early action, and consistency:
- CPR feedback devices: Recommended for training to help learners achieve the correct compression depth, rate, and recoil. These tools improve both initial skill acquisition and long-term retention.
- Drowning response: For lay rescuers, a compression-first (CAB) approach is recommended to simplify response. Health care professionals with a duty to respond may prioritize ventilation (ABC), recognizing the role of hypoxia in drowning-related arrests.
- CPR in obese patients: Standard CPR protocols remain appropriate. The emphasis is on maintaining high-quality compressions, even when patient characteristics present additional challenges.
- Dispatcher-assisted recognition: Continued improvements in emergency dispatch systems help identify cardiac arrest more quickly and guide bystanders through CPR. This plays a critical role in increasing early intervention rates before EMS arrival.
Education, Implementation, and Teams (EIT) Updates
One of the most impactful areas of the 2025 update is how resuscitation training is delivered:
- CPR feedback devices in training: Strongly supported to provide real-time performance data, helping learners correct mistakes and build confidence more quickly.
- In situ simulation: Training in real clinical environments is encouraged where possible. This approach helps teams practice workflow, communication, and system-level responses in the settings where care actually occurs.
- Teamwork training: Effective resuscitation depends on more than individual skill. Training should include clear communication, defined roles, and leadership under pressure to improve overall team performance.
- Gamified learning: Incorporating elements like competition and scoring can increase engagement and encourage repeated practice. Over time, this leads to better retention and more consistent performance in real scenarios.
ILCOR’s Six Task Forces
ILCOR organizes its work through six specialized task forces, each focused on a key area of resuscitation care. These groups review evidence, develop recommendations, and contribute to the CoSTR process within their specific domains.
- Basic Life Support Task Force: Focuses on foundational life-saving interventions, including CPR, AED use, and early recognition of cardiac arrest
- Advanced Life Support Task Force: Covers more complex clinical care, including airway management, medications, and post-resuscitation treatment
- Pediatric Life Support Task Force: Addresses resuscitation care for infants and children beyond the neonatal period
- Neonatal Life Support Task Force: Focuses on the unique needs of newborns, particularly during delivery and the immediate post-birth period
- Education, Implementation, and Teams Task Force: Examines how resuscitation is taught, practiced, and implemented, including training methods and team performance
- First Aid Task Force: Provides guidance on immediate care for injuries and medical emergencies before advanced help arrives
How to Stay Current with ILCOR Guidelines
ILCOR’s recommendations directly shape how ACLS and BLS certification programs are built and updated. When new CoSTR findings are released, national organizations translate them into updated guidelines, and training providers incorporate those changes into course content, skills assessments, and resuscitation algorithms.
Because the science is always evolving, certification programs are updated periodically to reinforce current, evidence-based care, phase out obsolete techniques, and improve real-world performance.
For health care professionals, staying current requires actively keeping up with how guidance is changing and how it applies in practice. To do that, you can:
- Follow CoSTR updates: Review ongoing recommendations published by ILCOR
- Maintain current certifications: Ensure your ACLS, BLS, and CPR training reflects the latest standards
- Engage in continuing education: Reinforce skills and adapt to new guidance over time
- Stay aligned with workplace protocols: Many employers update procedures based on new guidelines
It’s also important to recognize that not all training programs update at the same pace. Choosing a certification provider that aligns with current ILCOR-informed standards helps ensure your training is relevant, practical, and ready for real-world care.
Frequently Asked Questions about ILCOR Guidelines
What does ILCOR stand for?
ILCOR stands for the International Liaison Committee on Resuscitation. It is the global organization responsible for reviewing resuscitation science and developing evidence-based recommendations.
What is the difference between ILCOR recommendations and national guidelines?
ILCOR produces scientific recommendations, not binding guidelines. National organizations, such as the American Heart Association, use those recommendations to create formal guidelines that shape training, protocols, and certification requirements.
How often does ILCOR update its recommendations?
ILCOR uses a continuous evidence evaluation process, meaning updates can occur regularly as new research becomes available. Larger summary updates, like the CoSTR, reflect ongoing findings rather than a single fixed cycle.
How do the 2025 ILCOR updates affect my ACLS or BLS certification?
The 2025 updates influence the guidelines that certification programs are based on. While not every change results in immediate course updates, over time they shape training content, assessment standards, and best practices used in ACLS and BLS certification.
What is the CoSTR?
CoSTR stands for Consensus on Science with Treatment Recommendations. It is ILCOR’s formal process for reviewing evidence and issuing recommendations that guide resuscitation practices worldwide.
Are ILCOR guidelines mandatory for health care professionals?
ILCOR recommendations themselves are not mandatory. However, they inform the national guidelines and protocols that health care professionals are expected to follow, making them highly influential in real-world practice.
Keeping Your Skills Aligned with the Latest Science
For health care professionals, staying current with ILCOR-informed standards is essential. Even small updates can improve performance, strengthen team coordination, and ultimately lead to better patient outcomes.
If it’s time to renew your certification or you want to ensure your training reflects the latest science, certify or recertify with AMC. Staying up to date isn’t just about meeting requirements. It’s about being prepared to act with confidence when every second counts.