Difference Between ACLS and BLS
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Article at a Glance
- BLS stands for Basic Life Support, using CPR as the primary treatment.
- ACLS stands for Advanced Cardiac Life Support. It is for healthcare providers using advanced techniques and treatments.
- The foundation for ACLS is high-quality BLS.BLS stands for Basic Life Support, using CPR as the primary treatment.
- ACLS stands for Advanced Cardiac Life Support. It is for healthcare providers using advanced techniques and treatments.
- The foundation for ACLS is high-quality BLS.
ACLS and BLS are both lifesaving courses, but they are designed for different roles and environments. In this article, we’ll break down the key differences in scope, target audience, core skills, and the role of medications so you can understand which path fits your goals. By the end, you’ll know what each certification prepares you to do and when one is more appropriate than the other.
What is the Difference between BLS and ACLS?
BLS stands for basic life support. These are basic life-saving skills and BLS classes vary based on experience levels from a lay person all the way up to a licensed professional.
| Category | BLS (Basic Life Support) | ACLS (Advanced Cardiovascular Life Support) |
|---|---|---|
| Level of Care | Basic emergency care and immediate response | Advanced, team-based resuscitation and cardiac emergency management |
| Primary Goal | Keep oxygen flowing and circulation going until higher-level care arrives | Treat life-threatening cardiac rhythms and stabilize the patient in advanced settings |
| Target Audience | Healthcare providers and trained responders in many settings | Advanced clinical teams (hospital/EMS roles requiring expanded protocols) |
| Key Skills | High-quality CPR, AED use, rescue breathing, choking response | Rhythm recognition, airway management, cardioversion/defibrillation coordination, post–cardiac arrest care |
| Pharmacology | No medication administration focus | Includes medication use as part of algorithms (depending on role and protocol) |
| Typical Environment | Community, clinics, facilities, and early response before advanced care arrives | In-hospital settings and advanced prehospital teams with protocols and monitoring |
Related Video – Basic Life Support for Healthcare Providers
When determining AF, you’ll first notice a lack of a P wave. During atrial fibrillation, the atrial chambers are firing from multiple foci. The firing is quick, random, and chaotic, frequently occurring at a rate of 300–350 bpm with no discernible P-wave on an ECG tracing.

BLS stands for Basic Life Support.
ACLS stands for advanced cardiac life support, and it’s more in depth than BLS. ACLS is intended for licensed providers, paramedics, nurses, physicians, and other health providers.
ACLS training covers advanced topics like electrocardiogram (ECG) interpretation, drug administration, and electrical therapy, all of which can be practiced in an ACLS simulator. But always remember, without adequate BLS, ACLS isn’t going to help. BLS is the first line of defense.
Read: Criteria for a SVT (supraventricular tachycardia)

ACLS stands for Advanced Cardiac Life Support. The class is more in-depth than a BLS class.
If the ventricular rate is less than 100 bpm, it’s a controlled atrial fibrillation. If the ventricular rate is greater than 100 bpm, it’s an uncontrolled atrial fibrillation or atrial fibrillation with rapid ventricular response (RVR).
Frequently Asked Questions About ACLS and BLS
When does a BLS provider hand off to ACLS?
A BLS provider hands off to ACLS when advanced medical care is required, such as during cardiac arrest, unstable heart rhythms, or when medications and advanced airway management are needed. BLS focuses on immediate life support and stabilization until an ACLS-trained team takes over.
Is BLS a prerequisite for ACLS?
Yes, BLS is generally required before taking an ACLS course, and the BLS algorithm provides the structured foundation for these skills. ACLS builds on the foundational skills taught in BLS, including high-quality CPR, AED use, and basic airway management.
Who is required to obtain ACLS certification?
ACLS certification is typically required for healthcare professionals who manage cardiac emergencies, including those working in hospitals, emergency departments, critical care units, and advanced prehospital settings.
Do I need to be a doctor or nurse to get certified?
No. While ACLS is commonly taken by doctors and nurses, other healthcare professionals may also be required or permitted to obtain ACLS certification depending on their role and workplace requirements.
What is the biggest skill difference between a BLS and ACLS provider?
The biggest difference is decision-making at an advanced level. ACLS providers are trained to interpret cardiac rhythms, manage medications, coordinate team-based resuscitation, and adjust treatment based on patient response, while BLS focuses on immediate life-saving actions.
Summary
BLS stands for Basic Life Support and includes basic CPR measures plus more. It’s taught to lay people and medical professionals.
ACLS stands for Advanced Cardiac Life Support and includes more advanced skills such as ECG interpretation. The ACLS class is more in-depth than the BLS class and intended for medical professionals.
Strong proficiency in BLS is essential for success in ACLS, as ACLS training builds directly on the core life-saving skills taught in BLS. A solid understanding of CPR, AED use, and basic airway management provides the foundation needed to perform effectively in advanced cardiac emergencies.
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