Version control: This document is current with respect to 2015 American Heart Association® Guidelines for CPR and ECC. These guidelines are current until they are replaced on October 2020. If you are reading this page after October 2020, please contact ACLS Training Center at email@example.com for an updated document.
Using the BLS Healthcare Provider Algorithm for Managing VF and Pulseless VT
The BLS (basic life support) Primary Survey is used in all cases of cardiac arrest. For any emergency, you first see if the patient is responsive, call EMS, and find an AED. For this case, you assess a person without a pulse; you do not have an emergency care team to work with you.
- Make sure the scene is safe.
- Tap shoulder and ask, "Are you all right?"
- If the patient does not respond, call for help. Activate EMS.
- Get the automated external defibrillator (AED) or send someone for it, if someone is available.
Perform the ABCDs in the primary survey:
- Use a barrier device if you have one.
- Give each breath over 1 second.
- Ventilate the patient once every 6 seconds or 10 times per minute.
Watch for the patient's chest to rise and fall. Assess the patient for NORMAL breathing.
Check the patient's carotid pulse (take at least 5 seconds but not more than 10 seconds). No definite pulse? Start cycles of 30 chest compressions and 2 breaths until the AED arrives.
- Push hard and fast (100-120/min) and release completely.
- Perform compressions at a depth of 2 inches to 2.4 inches (5-6cm).
- Let the chest to completely recoil.
- Minimize interruptions to less than 10 seconds.
Defibrillation using and AED
After the AED arrives, attach AED pads to the patient's chest (see AED section for details). Turn on the AED. Follow prompts.
Is the rhythm shockable?
- If the AED advises a shock, make sure bystanders or other helpers stay clear.
- Give one shock.
Resume CPR immediately for 5 cycles (approximately 2 minutes). The AED will advise you when to stop so it can analyze the rhythm. Deliver a shock if instructed to do so. Repeat cycle of CPR. If rhythm is not shockable, resume CPR immediately for 5 cycles. Check rhythm every 5 cycles. Continue until ALS providers take over or the patient starts to move.
Unclear if the patient has a pulse?
Begin CPR immediately. Do not waste time trying to be certain about a pulse. It is better to begin CPR that is unnecessary than to neglect compressions when they are needed. Do compressions on a patient with a pulse is not harmful. However, delaying CPR for a pulseless patient reduces the patient's chances of being successfully resuscitated.