An estimated 300,000-500,000 patients present to the emergency department (ED) every year inCanada with complaints of chest pain.​1​ In USA, the numbers are even more staggering at 8million per year.​2​ Given its prevalence, having a structured and rapid approach to chest pain isessential. Use the mnemonic PETMAC as an approach to these 6 cannot-miss causes of chestpain in the ED. Just think of your friendly neighbourhood pet, Mac! P: Pulmonary Embolism Classically presents …