The TREASURE observational study is designed to address the need to understand the usage pattern of Ticagrelor in real life scenario in large number of ACS (Acute Coronary Syndrome) patients in India. The aim of this national study is to understand the usage pattern (including the duration of treatment) of Ticagrelor in various ACS patient population undergoing PCI (Percutaneous Coronary Intervention), CABG (Coronary Artery Bypass Graft) or medical management in a real-life setting in India.