The term acute coronary syndrome (ACS) describes a range of conditions, including unstable angina, non-ST-elevation myocardial infarction (NSTEMI) and ST-elevation myocardial infarction (STEMI), which are associated with a sudden reduction of blood flow to the heart. Its presentation is broad, and can include chest pain, cardiac arrest, haemodynamic instability, or cardiogenic shock. Urgent assessment of patients presenting with chest pain is crucial to the outcome as ACS treatment is time sensitive.