Clinical Algorithms
Review key life support algorithms from the American Heart Association.
Select an Algorithm
Basic Life Support (BLS) - Adult
This is a simplified algorithm for educational purposes. Always follow the most current AHA guidelines and your local protocols in a clinical setting.
Verify Scene Safety
Ensure the scene is safe for you and the victim.
Check for Responsiveness
Tap the victim's shoulder and shout, 'Are you okay?'
Call for Help & AED
If unresponsive, shout for nearby help. Activate emergency response system (e.g., call a code). Get an AED or send someone to get one.
Check for Breathing & Pulse
Scan the chest for movement (5-10 seconds) and check for a carotid pulse simultaneously. If no breathing (or only gasping) and no pulse, start CPR.
Start CPR (30:2)
Begin high-quality chest compressions. Push hard (at least 2 inches deep) and fast (100-120 compressions per minute) on the center of the chest. Give 2 rescue breaths after every 30 compressions.
Use AED
As soon as the AED arrives, turn it on and follow the voice prompts. Attach pads to the victim's bare chest.
Follow AED Prompts
The AED will analyze the heart rhythm. If a shock is advised, ensure no one is touching the victim and press the shock button. Immediately resume CPR after the shock.
Continue CPR
Continue cycles of 30 compressions and 2 breaths until the person starts to move or emergency help takes over.