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Updated: Aug 18, 2026
In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
Published on: February 16, 2016
Relation of myocardial perfusion to mortality after primary percutaneous coronary intervention
Juhana Karha1, J Emilio Exaire, Vivek Rajagopal
1Department of Cardiovascular Medicine, Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA.
Insights
Poor myocardial blush after percutaneous coronary intervention (PCI) increases mortality risk in patients, irrespective of epicardial artery flow. This highlights the need for better assessment and improved strategies for myocardial reperfusion following PCI.
Area of Science:
- Cardiology
- Interventional Cardiology
- Myocardial Reperfusion Injury
Background:
- Primary percutaneous coronary intervention (PCI) is a key treatment for acute myocardial infarction.
- Epicardial perfusion, assessed during PCI, is a standard measure of reperfusion success.
- Myocardial blush, a measure of microvascular reperfusion, is increasingly recognized as critical.
Purpose of the Study:
- To investigate the prognostic significance of myocardial blush in patients undergoing primary PCI.
- To determine if poor myocardial blush impacts mortality independently of epicardial perfusion.
- To inform strategies for optimizing myocardial reperfusion after primary PCI.
Main Methods:
- Retrospective analysis of patients undergoing primary PCI.
- Assessment of epicardial perfusion using coronary angiography.
- Evaluation of myocardial blush grade post-PCI.
Main Results:
- Poor myocardial blush was significantly associated with increased mortality.
- This association persisted even in patients with adequate epicardial perfusion.
- Inadequate microvascular reperfusion (poor blush) is a predictor of adverse outcomes.
Conclusions:
- Myocardial blush is a critical, independent predictor of mortality post-primary PCI.
- Current evaluation of primary PCI may need to incorporate myocardial blush assessment.
- Strategies aimed at improving microvascular function are crucial for enhancing outcomes after primary PCI.
Abstract:
In patients who undergo primary percutaneous coronary intervention (PCI), poor post-PCI myocardial blush is associated with increased mortality, even when epicardial perfusion is adequate. This observation has important implications for the methods of evaluating primary PCI results and the strategies used to improve myocardial reperfusion.
