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Current Smoking and Prognosis After Acute ST-Segment Elevation Myocardial Infarction: New Pathophysiological Insights Cardiac MRI Endpoints in Myocardial Infarction Experimental and Clinical Trials JACC Scientific Expert Panel Considerations for Single-Measurement Risk-Stratification Strategies for Myocardial Infarction Using Cardiac Troponin Assays Treating Multivessel Coronary Artery Disease in ST-Segment Elevation Myocardial Infarction: Why, How, and When? Chronic Kidney Disease and Coronary Artery Disease Aggressive lipid-lowering therapy after percutaneous coronary intervention – for whom and how? Positive remodelling of coronary arteries on computed tomography coronary angiogram: an observational study Beta-Blockers after Myocardial Infarction and Preserved Ejection Fraction Ticagrelor alone versus ticagrelor plus aspirin from month 1 to month 12 after percutaneous coronary intervention in patients with acute coronary syndromes (ULTIMATE-DAPT): a randomised, placebo-controlled, double-blind clinical trial Beta-Blockers after Myocardial Infarction and Preserved Ejection Fraction

Review ArticleVolume 12, Issue 10, May 2019

JOURNAL:JACC Cardiovasc Interv. Article Link

The Potential Use of the Index of Microcirculatory Resistance to Guide Stratification of Patients for Adjunctive Therapy in Acute Myocardial Infarction

Maznyczka AM, Oldroyd KG, Berry C et al. Keywords: ST-segment elevation myocardial; adjunctive therapy; index of microcirculatory resistance; infarction; microvascular obstruction; stratified medicine

ABSTRACT


The goal of reperfusion therapies in ST-segment elevation myocardial infarction has evolved to include effective reperfusion of the microcirculation subtended by the culprit epicardial coronary artery. The index of microcirculatory resistance is measured using a pressure- and temperature-sensing coronary guidewire and quantifies microvascular dysfunction. The index of microcirculatory resistance is an independent predictor of microvascular obstruction, infarct size, and adverse clinical outcomes. It has the advantage of being immediately measurable in the catheterization laboratory, before the results of blood biomarkers or noninvasive imaging become available. This provides an opportunity for additional intervention that may alter outcomes. In this review, the authors provide a critical appraisal of the published research on the emerging role of the index of microcirculatory resistance as a tool to guide the stratification of patients for adjunctive therapeutic strategies in acute ST-segment elevation myocardial infarction.


Copyright © 2019. Published by Elsevier Inc.