The Singapore Advanced Cardiac Life Support Guidelines 2021 focus on advanced techniques to save lives during cardiac arrest. These include using advanced airway management, circulatory support, and specific medications. The guidelines also stress the importance of identifying and treating reversible causes of cardiac arrest. Special situations like drowning, pulmonary embolism, and pregnancy are covered. After resuscitation, ongoing care is crucial. The guidelines also address managing dangerous heart rhythms that can lead to cardiac arrest.