What is the correct definition of cardiac arrest?

The correct definition of cardiac arrest is the cessation of blood circulation due to ineffective cardiac pumping. This condition occurs when the heart is no longer able to pump blood effectively, resulting in a sudden stop of blood flow to the body, which can rapidly lead to loss of consciousness and death if not treated promptly. Cardiac arrest can be caused by various factors, including arrhythmias, severe heart attacks, or trauma.

The critical aspect of this definition is that it specifically addresses the lack of effective cardiac output, highlighting that without proper circulation, vital organs do not receive the oxygen and nutrients they need to function. Immediate intervention through cardiopulmonary resuscitation (CPR) and advanced life support measures is essential to restore circulation and potentially save the patient's life.