When the heart abruptly stops beating, sudden cardiac arrest becomes a critical medical emergency, often resulting in death if not treated within minutes. This condition frequently stems from electrical disturbances in the heart, leading to arrhythmias that disrupt its pumping function. Sudden cardiac arrest can strike individuals with or without prior heart conditions, making its unpredictability particularly alarming. Immediate action, such as cardiopulmonary resuscitation (CPR) and defibrillation, is crucial to save lives. Advances in wearable technologies and implantable devices are now helping to monitor and prevent sudden cardiac arrest in high-risk individuals, offering hope for better outcomes and improved public health strategies.