Percutaneous Coronary Intervention Strategies for Myocardial Infarction
Summary
Percutaneous coronary intervention (PCI) is the cornerstone of reperfusion therapy in myocardial infarction, aiming to promptly restore epicardial blood flow and preserve viable myocardium. Strategies have evolved from simple balloon angioplasty to stent implantation, with refinements including direct stenting, deferred stenting, and adjunctive thrombectomy. Key challenges include coronary microvascular dysfunction and the no-reflow phenomenon, which are associated with adverse outcomes despite successful restoration of artery patency. Optimising intracoronary drug delivery, reducing distal embolisation and tailoring the timing of stent deployment are active areas of investigation. Recent advances focus on individualised procedural approaches and novel pharmacological adjuncts to enhance microvascular perfusion and long-term prognosis.
Research from Nature Portfolio
Recent studies have investigated the impact of different stenting techniques on microvascular integrity after ST-segment elevation myocardial infarction. In a prospective cohort of patients with multivessel disease undergoing primary PCI, direct stenting of the culprit lesion, compared with balloon pre-dilatation and stenting, was associated with a markedly lower incidence of coronary microvascular dysfunction at three months, as indicated by improved coronary flow reserve and reduced index of microcirculatory resistance. This approach also translated into fewer major adverse cardiovascular events at one year. Aspiration thrombectomy and intracoronary glycoprotein IIb/IIIa inhibitors further reduced microvascular injury, highlighting the importance of procedural adjuncts in preserving microvascular health.
Percutaneous Coronary Intervention Strategies for Myocardial Infarction publication trend
The graph below shows the total number of articles in percutaneous coronary intervention strategies for myocardial infarction across all publications each year (not limited to Nature Index journals).
Technical terms
Percutaneous coronary intervention (PCI): A catheter-based procedure to reopen blocked coronary arteries during myocardial infarction.
Microvascular obstruction: Impaired perfusion in small coronary vessels despite reopening of the main artery.
No-reflow phenomenon: Failure to achieve adequate myocardial perfusion after successful recanalisation of the epicardial artery.
Direct stenting: Deployment of a stent without prior balloon dilation to reduce distal embolisation.
Deferred stenting: Delaying stent placement after initial reperfusion to minimise microvascular damage.
Thrombolysis In Myocardial Infarction (TIMI) flow grade: Angiographic scale (0–3) assessing blood flow, with grade 3 representing normal perfusion.
Coronary flow reserve (CFR): Ratio of maximal to resting coronary blood flow, reflecting microvascular function.
Index of microcirculatory resistance (IMR): Invasive measure of resistance in the coronary microcirculation indicating microvascular integrity.
References
- Efficacy of catheter‐based drug delivery in a hybrid in vitro model of cardiac microvascular obstruction with porcine microthrombi. Bioengineering & Translational Medicine (2023).
- The impact of primary percutaneous coronary intervention strategies during ST-elevation myocardial infarction on the prevalence of coronary microvascular dysfunction. Scientific Reports (2023).
- A Randomized Trial of Deferred Stenting Versus Immediate Stenting to Prevent No- or Slow-Reflow in Acute ST-Segment Elevation Myocardial Infarction (DEFER-STEMI). Journal of the American College of Cardiology (2014).
- Effect of intracoronary agents on the no-reflow phenomenon during primary percutaneous coronary intervention in patients with ST-elevation myocardial infarction: a network meta-analysis. BMC Cardiovascular Disorders (2018).
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