What is an event in which the heart abruptly stops or develops a very abnormal arrhythmia that that prevents it from pumping blood is known as?

An event in which the heart abruptly stops or develops a very abnormal arrhythmia that prevents it from pumping blood is known as cardiac arrest. This condition can lead to loss of consciousness and, if not treated promptly, can be fatal. Immediate medical intervention, such as cardiopulmonary resuscitation (CPR) or defibrillation, is crucial to restore normal heart function.