ACLS, or Advanced Cardiovascular Life Support, is a set of advanced medical protocols for treating life-threatening cardiovascular emergencies like cardiac arrest, stroke, and acute coronary syndromes. It builds on Basic Life Support (BLS) skills and emphasizes high-quality CPR, team dynamics, and systematic interventions such as advanced airway management, defibrillation, and medication administration. The goal is to improve patient survival rates through quick, coordinated, and evidence-based care.