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Evidence is increasing that coronary revascularization guided with fractional flow ratio (FFR) in patients with predominantly stable coronary artery disease (CAD) improves clinical outcomes, with benefits even found in non–infarct-related arteries in patients with ST-segment elevation myocardial infarction (STEMI; NEJM JW Cardiol Mar 18 2017; [e-pub] and N Engl J Med 2017 Mar 18; [e-pub]). Despite mounting evidence and guideline recommendations, adoption of FFR-guided revascularization has been limited, mainly due to logistical challenges like the prolonged procedure time and adverse effects (bradycardia, heart block, dyspnea, and chest pain) of adenosine, which is necessary to achieve a hyperemic state. A simplified approach — especially i…