Understanding Heart Attack Symptoms and Emergency Response #1203607 (License: Personal Use)

This medical illustration depicts a human heart with prominent red (arterial) and blue (venous) vessels, overlaid by a bold orange lightning bolt to symbolize electrical disruption or sudden cardiac event. The image conveys urgency and is commonly used in public health materials to highlight life-threatening cardiovascular emergencies.

Used on health education pages, emergency response guides, cardiology resources, and first-aid training sites; targets users seeking to recognize heart attack symptoms or understand sudden cardiac events.