Related Experiment Video
Updated: Jan 12, 2026
Bone Marrow Sampling and Transplants
Adjunctive thrombectomy and distal protection in primary percutaneous coronary intervention: impact on microvascular
Manivannan Srinivasan1, Charanjit Rihal, David R Holmes
1Department of Internal Medicine, Mayo Clinic and Mayo Foundation, Rochester, MN 55905, USA.
Insights
Adjunctive aspiration thrombectomy during primary percutaneous coronary intervention improves outcomes for ST-elevation myocardial infarction patients. This approach addresses microvascular dysfunction, reducing infarct size and improving clinical endpoints.
Area of Science:
- Cardiology
- Interventional Cardiology
- Cardiovascular Research
Background:
- Persistent microvascular dysfunction after ST-elevation myocardial infarction (STEMI) reperfusion is linked to adverse outcomes.
- Mechanisms of microvascular dysfunction include distal microembolization during percutaneous coronary intervention (PCI).
- Adjunctive mechanical thrombectomy is being investigated to mitigate these effects.
Purpose of the Study:
- To review the current evidence on mechanical thrombectomy and embolic protection in native coronary arteries during primary PCI for STEMI.
- To evaluate the role of these interventions in improving microvascular blood flow and clinical outcomes.
Main Methods:
- Review of randomized trials and recent studies, including the Thrombus Aspiration During Percutaneous Coronary Intervention in Acute Myocardial Infarction Study (TAPAS).
- Analysis of data on surrogate and clinical endpoints related to thrombectomy devices and embolic protection during primary PCI.
Main Results:
- Previous trials of thrombectomy and distal protection devices yielded conflicting results.
- The TAPAS trial, the largest randomized study of an aspiration thrombectomy device, demonstrated improved surrogate and clinical endpoints.
- Adjunctive aspiration thrombectomy during primary PCI shows promise in improving patient outcomes.
Conclusions:
- Mechanical thrombectomy, particularly aspiration thrombectomy, is a valuable adjunctive strategy in primary PCI for STEMI.
- Further research and clinical implementation are warranted to optimize its role in managing microvascular dysfunction and improving STEMI patient outcomes.
Abstract:
A significant proportion of patients with ST-elevation myocardial infarction have persistent impairment of microvascular blood flow despite successful reperfusion of epicardial vessels. Microvascular dysfunction has been associated with larger infarct size, increased predisposition to ventricular arrhythmias, heart failure, cardiogenic shock, recurrent myocardial infarction, and death. It remains unclear whether this association is of direct mechanistic significance or whether the microcirculatory injury is an epiphenomenon and a manifestation of greater ischemic insult to the myocardium. Although several potential mechanisms have been proposed for the microvascular dysfunction, distal microembolization during mechanical reperfusion is likely to be an important contributor. Consequently, there has been increasing interest in the concept of adjunctive mechanical thrombectomy to improve outcomes in primary percutaneous coronary intervention. Until recently, randomized trials of thrombectomy and distal protection devices during primary percutaneous coronary intervention have provided conflicting results with no definitive evidence for efficacy. The recently published Thrombus Aspiration During Percutaneous Coronary Intervention in Acute Myocardial Infarction Study has rekindled the interest in this area. This trial is the largest randomized study of a thrombectomy device published to date and demonstrates that adjunctive treatment with aspiration thrombectomy during primary percutaneous coronary intervention improves surrogate and clinical end points. The aim of the present report is to review the evidence to date on the role of mechanical thrombectomy and embolic protection in native coronary arteries during primary percutaneous coronary intervention.
