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Impact of manual thrombectomy on microvascular obstruction in STEMI patients

David Meier1, Stephane Fournier1,2, Pier G Masci1

  • 1Department of Cardiology, Lausanne University Hospital, Lausanne, Switzerland.

Catheterization and Cardiovascular Interventions : Official Journal of the Society for Cardiac Angiography & Interventions
|April 12, 2020
PubMed

Insights

Manual thrombectomy (MT) in ST-segment elevation myocardial infarction (STEMI) patients was linked to increased microvascular obstruction (MVO). This effect was particularly pronounced in patients with a high thrombus burden, as assessed by cardiac magnetic resonance (CMR).

Area of Science:

  • Cardiology
  • Interventional Cardiology
  • Cardiovascular Imaging

Background:

  • ST-segment elevation myocardial infarction (STEMI) is a critical condition requiring prompt reperfusion.
  • Microvascular obstruction (MVO) is a key determinant of infarct size and clinical outcomes post-STEMI.
  • Cardiac magnetic resonance (CMR) is a valuable tool for assessing MVO.

Purpose of the Study:

  • To evaluate the impact of manual thrombectomy (MT) on microvascular obstruction (MVO) in STEMI patients.
  • To analyze MVO occurrence and extent using CMR following primary percutaneous coronary intervention (PCI).

Main Methods:

  • Retrospective analysis of 383 STEMI patients undergoing CMR.
  • Patients were categorized into groups with and without MT.
  • MVO occurrence and extent were assessed as primary endpoints using CMR.

Main Results:

  • MVO was present in 49.1% of patients.
  • The MT group showed significantly higher MVO incidence (59.5% vs. 38.9%) and extent (1.5 vs. 0 segments).
  • MT remained an independent determinant of MVO, especially in patients with high thrombus burden.

Conclusions:

  • Manual thrombectomy in STEMI patients is associated with increased MVO.
  • The association between MT and MVO is more significant in patients with high thrombus burden.
  • CMR is crucial for quantifying MVO and understanding its relationship with thrombectomy in STEMI.
Abstract

Keywords:
STEMIcardiac magnetic resonancemechanical thrombectomymicrovascular obstruction

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