Advanced cardiac life support (ACLS) refers to interventions for urgent treatment of cardiac arrest and other life-threatening emergencies, as well as the knowledge and skills to deploy those interventions. ACLS protocols from the American Heart Association are considered the gold standard and get reviewed every 5 years. BLS with high-quality CPR forms the critical foundation for ACLS. For shockable rhythms like ventricular fibrillation, the ACLS treatment involves defibrillation, CPR, and administration of drugs like epinephrine and amiodarone. For non-shockable rhythms like asystole, ACLS focuses on identifying and treating reversible causes through CPR and medications while preparing for transport to a hospital.