What is a shockable rhythm?

A shockable rhythm refers to certain abnormal heart rhythms that can be effectively treated with the use of an electrical shock therapy called defibrillation. These rhythms include ventricular fibrillation and pulseless ventricular tachycardia, which are life-threatening conditions that can lead to sudden cardiac arrest.

When a person experiences a shockable rhythm, their heart is essentially quivering or beating abnormally fast, which prevents it from effectively pumping blood to the rest of the body. This can lead to a lack of oxygen delivery to vital organs and tissues, potentially causing damage or even death if not promptly treated.

Defibrillation involves the use of an automated external defibrillator (AED) or a manual defibrillator to deliver a controlled electrical shock to the heart, which can help to restore a normal heart rhythm. This shock interrupts the abnormal electrical activity in the heart and allows the heart's natural pacemaker to regain control and initiate a normal heartbeat.

Immediate recognition and treatment of shockable rhythms are critical in saving lives, as prompt defibrillation can significantly increase the chances of survival for someone experiencing sudden cardiac arrest. Training in cardiopulmonary resuscitation (CPR) and the use of an AED is important for anyone who may find themselves in a situation where they need to respond to a cardiac emergency.