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The signs and symptoms of acute coronary syndrome, which usually begin abruptly, include the following: Chest pain (angina) or discomfort, often described as aching, pressure, tightness or burning. Pain radiating from the chest to the shoulders, arms, upper abdomen, back, neck or jaw. Nausea or vomiting. Indigestion.
Curtis M. Rimmerman. The term acute coronary syndrome (ACS) is in some cases used interchangeably with the term coronary artery disease (CAD). Strictly speaking, however, acute coronary syndrome is subcategory of coronary artery disease. For example, CAD can be asymptomatic, but ACS almost always represents a symptom such as unstable angina or myocardial infarction.