Final answer:
Cardiac arrest requires resuscitative measures like CPR to restore the heart's function and prevent irreversible organ damage.
Step-by-step explanation:
Cardiac arrest is a medical emergency where the heart stops pumping blood effectively, leading to the failure of vital organs. In such cases, resuscitative measures are crucial to restore the heart's function and prevent irreversible damage to organs, including the brain. CPR (cardiopulmonary resuscitation) is an emergency technique that involves applying pressure on the chest to manually compress the heart and maintain blood circulation. CPR should be performed until the patient regains spontaneous contraction or is declared dead by a healthcare professional.