Rad AB, et al. - The objective of this study was to define, implement, and demonstrate an automatic resuscitation rhythm annotator (ARA) architecture for complete resuscitation episodes, including chest compression pauses (CC-pauses) and chest compression intervals (CC-intervals). Findings demonstrated the feasibility of semi-automatic resuscitation rhythm annotation, which may involve further revision/correction by clinicians for quality assurance. They observed significant drop in performance (unweighted mean of sensitivities) during CC-intervals and lowest sensitivity for pulseless electrical activity.