Key result
An IMR >40 was associated with a 2.1-fold increased risk of death or rehospitalization for heart failure (HR, 2.1; P =0.034) after primary PCI.
Why the study?
Does an elevated Index of Microcirculatory Resistance (IMR >40) predict death or rehospitalization for heart failure in patients undergoing primary PCI?
Population
Patients undergoing primary percutaneous coronary intervention
Comparison
Index of Microcirculatory Resistance > 40… vs IMR ≤ 40
Design
Cohort
Follow-up
median 2.8 years
Authors
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Elevated post-PCI IMR identifies higher-risk patients but should not yet change practice; leaves open whether IMR-guided therapy improves outcomes.
Does an elevated Index of Microcirculatory Resistance (IMR >40) predict death or rehospitalization for heart failure in patients undergoing primary PCI?
An elevated Index of Microcirculatory Resistance (>40) measured immediately after primary PCI is a strong independent predictor of long-term death and heart failure rehospitalization.
Fearon et al. (2013) studied this question. An IMR >40 was associated with a 2.1-fold increased risk of death or rehospitalization for heart failure (HR, 2.1; P =0.034) after primary PCI.
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