Definition of Non-shockable Rhythm

Non-shockable Rhythm

A non-shockable rhythm is a cardiac arrest rhythm that will not respond to defibrillation because there is no organized electrical activity for a shock to reset. The two non-shockable rhythms are asystole (a flatline, with no electrical activity) and pulseless electrical activity (PEA), in which electrical signals are present but produce no effective pulse.

Because a shock offers no benefit, treatment centers on uninterrupted high-quality CPR, administration of epinephrine, and a focused search for and correction of reversible causes (the Hs and Ts). Distinguishing non-shockable from shockable rhythms quickly and accurately is a fundamental skill, since it determines the entire treatment pathway during resuscitation.

CPR Certification Labs provides hands-on, American Heart Association–aligned CPR, BLS, ACLS, and PALS certification training to help providers master these life-saving skills.

Medical Definition & Meaning

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