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Updated: Feb 12, 2026

Myocardial Infarction by Percutaneous Embolization Coil Deployment in a Swine Model
Published on: November 4, 2021
Symptomatic delayed coil migration after balloon assisted embolization: An underreported adverse event?
Lino Fonseca1, Rafael Najarro-Quispe2, Ana Rodríguez-Hernández2
1Department of Neurological Surgery, Centro Hospitalar Lisboa Central - Hospital São José, Lisbon, Portugal.
Delayed coil migration after balloon-assisted coiling for wide-necked brain aneurysms is a rare but emerging complication. This case highlights the need for vigilance with new endovascular techniques.
Area of Science:
- Neurosurgery
- Interventional Neurology
- Vascular Neurology
Background:
- Microsurgical clipping is the gold standard for broad-neck intracranial aneurysms.
- Endovascular techniques like balloon-assisted coiling offer promising alternatives.
- Long-term safety data for endovascular treatments are still limited.
Observation:
- A case of delayed coil migration after balloon-assisted embolization of a wide-necked intracranial aneurysm is presented.
- A literature review was conducted to identify similar cases of delayed coil migration.
- Intraprocedural coil migration is well-documented, but delayed migration is rarely reported.
Findings:
- Delayed coil migration is a potential, albeit rare, complication of balloon-assisted coiling.
- The increasing use of endovascular techniques may lead to a rise in such adverse events.
- This complication underscores the importance of continued monitoring and research into endovascular aneurysm treatment.
Implications:
- Endovascular techniques are increasingly favored for aneurysms, necessitating awareness of potential delayed complications.
- Further research and randomized controlled trials are needed to compare long-term outcomes of clipping versus endovascular methods.
- Developing strategies are required to manage and mitigate the risks associated with delayed coil migration.
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