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Clinical treatment pathways are useful to ensure that evidence-based medicine is consistently applied in hospital systems and have been shown to improve patient outcomes. Such pathways need to be regularly updated and revised by incorporating new evidence from clinical trials to ensure optimal clinical care. In 2011, we published the Columbia University Medical Center/New York Presbyterian Hospital - Clinical Pathways for Acute Coronary Syndromes and Chest Pain. This algorithm includes primary percutaneous coronary intervention for all patients with ST-segment elevation myocardial infarction and an early invasive approach for patients with non-ST-segment elevation myocardial infarction. Since our last chest pain algorithm update, the novel antiplatelet agent ticagrelor has been introduced in the United States, resulting in an important revision of our acute coronary syndrome clinical pathways. Herein, we present our updated chest pain algorithm and provide rationale for the changes that we have made to our protocol.

In 2008, we published our chest pain protocol for the management of acute coronary syndromes (ACS) and acute myocardial infarction. Our algorithm was specifically designed for our institution, which includes primary percutaneous intervention (PCI) for all ST-elevation myocardial infarctions (STEMIs) and a preferred invasive approach for non-STEMIs. Since 2008, there have been changes in the adjunctive pharmacotherapeutic armamentarium for PCI in both the STEMI and non-STEMI ACS context. In particular, recent data on the novel antiplatelet agent prasugrel, dosing of clopidogrel after PCI, and interactions with clopidogrel and other medicines and substrates, which can lead to decreased platelet response to clopidogrel, have led us to update our ACS clinical pathway. We present our updated chest pain algorithm with a brief review of the rapidly evolving changes in adjunctive pharmacotherapy for PCI, and provide rationale for the changes that we have made to our institutional protocol. Clinical pathways need to be regularly updated and revised by incorporating new evidence from clinical trials to ensure optimal clinical care.