Endovascular Thrombectomy for Ischemic Stroke

Endovascular thrombectomy has emerged over the past decade as a cornerstone intervention for acute ischaemic stroke caused by large‐vessel occlusion. By navigating microcatheters through the arterial system to the site of thrombus, interventionalists can deploy stent‐retrievers or aspiration devices to achieve rapid mechanical reperfusion. This approach, when combined with intravenous thrombolysis where appropriate, has transformed functional outcomes, reducing disability and mortality. Patient selection hinges on swift imaging to confirm occlusion location and assess salvageable brain tissue, with computed tomography angiography (CTA) and perfusion metrics guiding treatment decisions. Initially reserved for occlusions of the internal carotid and proximal middle cerebral artery segments, indications have expanded to include more distal and medium‐vessel occlusions as device designs and operator experience have improved. Key challenges remain in defining optimal time windows, achieving reperfusion of tortuous distal vessels without vessel injury, and tailoring care across diverse healthcare systems. Global registries and randomised trials continue to refine eligibility criteria, technical protocols and post‐procedure management to maximise the benefit of this life‐saving treatment.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Endovascular Thrombectomy for Ischemic Stroke publication trend

The graph below shows the total number of articles in endovascular thrombectomy for ischemic stroke across all publications each year (not limited to Nature Index journals).

Technical terms

Endovascular thrombectomy: Mechanical removal of an intravascular thrombus via catheter‐based techniques under fluoroscopic guidance.

Medium vessel occlusion (MeVO): Blockage affecting cerebral arteries beyond the major proximal segments, typically involving M2 branches or smaller vessels.

Time-to-maximum (Tmax) maps: CT perfusion parameter indicating regions of delayed contrast arrival, used to detect ischaemic penumbra and identify occlusion sites.

Modified Thrombolysis in Cerebral Infarction (TICI) score: Grading scale for angiographic reperfusion, where grades 2b–3 denote successful reflow of downstream vessels.

Modified Rankin Scale (mRS): Six‐point scale measuring global disability after stroke, with scores of 0–2 indicating functional independence.

References

1. Benefit of endovascular treatment for primary versus secondary medium vessel occlusion: A multi‐center experience. CNS Neuroscience & Therapeutics (2024).
2. Mechanical Thrombectomy in Isolated Occlusion of the Proximal Posterior Cerebral Artery. Frontiers in Neurology (2021).
3. Distal Medium Vessel Occlusions Can Be Accurately and Rapidly Detected Using Tmax Maps. Stroke (2021).