When using the Analyze Late protocol, you will deliver three minutes of CPR using an ITD, if possible, before starting rhythm analysis with a defibrillator. Other rescuers should prepare and attach the defibrillator as quickly as possible during this time.*

Analyze Late means 3 minutes of CPR before analyzing

* Do not interrupt CPR to perform ALS measures during this three minute period.

View additional information on the ITD
Circulation Journal (external link)