RT Book, Section A1 Auguste, Uschi A1 Kanei, Yumiko A2 Go, Ronaldo Collo SR Print(0) ID 1160186100 T1 Acute Coronary Syndromes T2 Critical Care Examination and Board Review YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9781259834356 LK accessanesthesiology.mhmedical.com/content.aspx?aid=1160186100 RD 2024/04/19 AB An acute coronary syndrome (ACS) encompasses a clinical spectrum of myocardial ischemia ranging from unstable angina (UA) and non–ST-segment elevation myocardial infarction (NSTEMI) to ST-segment elevation myocardial infarction (STEMI), and represents an acute phase of coronary atherosclerosis.1-3 Early recognition, diagnosis, and prompt revascularization of the culprit lesion with percutaneous coronary intervention (PCI) is the contemporary management strategy for patients presenting with STEMI or high-risk NSTEMI.1,2,4,5 Acute plaque rupture and subsequent atherothrombosis with consequent myocardial injury is the most common etiology for ACS; however, myocardial necrosis in the absence of unstable plaque may ensue in critically ill patients who are admitted for non–cardiac-related conditions, such as pulmonary embolism and septic shock. These patients pose a unique diagnostic and management challenge, as concomitant multiorgan failure, electrolyte derangements, and coagulopathy further complicate the clinical picture.6-8 In this chapter, we will review the universal definition of myocardial infarction (MI) and the related patient presentations, risk stratification models, complications, and management strategies.