A Zoll defibrillator is a brand of defibrillator used by hospitals, emergency medical services, and other trained responders to treat cardiac arrest and monitor patients. Like other defibrillators, it analyzes the heart's rhythm and delivers an electric shock to terminate shockable rhythms such as ventricular fibrillation and pulseless ventricular tachycardia.

Many such devices also provide real-time CPR feedback on compression depth and rate, helping rescuers maintain high-quality chest compressions, along with monitoring features for rhythm, oxygen saturation, and other vital signs. As with any defibrillator, effective use depends on the operator's training in rhythm recognition, safe shock delivery, and integration of defibrillation with continuous CPR.

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.