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Staged angioplasty for carotid artery stenosis to prevent postoperative hyperperfusion
Shinichi Yoshimura1, Hideomi Kitajima, Yukiko Enomoto
1Department of Neurosurgery, Graduate School of Medicine, Gifu University, Gifu, Japan. s- yoshi@gifu- u.ac.jp
Insights
Staged angioplasty (SAP) effectively prevents hyperperfusion (HP) after carotid revascularization in high-risk patients. This method significantly reduces the incidence of HP phenomenon and related complications compared to standard stenting.
Area of Science:
- Neurology
- Vascular Surgery
- Radiology
Background:
- Hyperperfusion (HP) is a rare but severe complication following carotid revascularization procedures.
- Patients with high-grade internal carotid artery stenosis and impaired cerebral blood flow (CBF) are at increased risk.
- Preventing HP is crucial for patient safety and successful outcomes.
Purpose of the Study:
- To evaluate the clinical efficacy of staged angioplasty (SAP) in preventing HP after carotid revascularization.
- To compare the incidence of HP between SAP and standard carotid artery stenting in high-risk patients.
Main Methods:
- A prospective study involving 143 patients with high-grade internal carotid artery stenosis.
- Eighteen high-risk patients identified by single-photon emission computed tomography (SPECT) with acetazolamide for impaired CBF and vasoreactivity.
- Nine patients underwent standard carotid artery stenting; nine underwent SAP (balloon angioplasty followed by stenting 1-2 months later).
Main Results:
- In the standard stenting group, 56% of patients experienced HP phenomenon, with one developing status epilepticus.
- In the SAP group, none of the treated patients developed postprocedure HP phenomenon or HP syndrome.
- SAP demonstrated a significant reduction in HP incidence in selected high-risk patients.
Conclusions:
- Staged angioplasty (SAP) is an effective method for decreasing the HP phenomenon after carotid revascularization in high-risk individuals.
- SAP offers a relatively simple and safe approach to avoid HP syndrome.
- Further research is warranted to confirm these findings in larger cohorts.
Objective:
Hyperperfusion (HP) is a rare but potentially devastating complication after carotid revascularization. This report describes the clinical efficacy of staged angioplasty (SAP) for carotid artery stenosis to prevent HP after carotid revascularization.
Methods:
Eighteen of 143 patients with high-grade internal carotid artery stenosis scheduled for angioplasty were considered at high risk of postprocedure HP based on their severely impaired cerebral blood flow (CBF) and cerebral vasoreactivity, which were determined using single-photon emission computed tomography with acetazolamide. Nine of the high-risk patients were treated with carotid artery stenting and the other 9 were treated with SAP, which consisted of balloon angioplasty with undersized balloon catheters (Stage 1) followed by carotid artery stenting 1 to 2 months later (Stage 2).
Results:
In the regular carotid artery stenting group, 5 of 9 patients (56%) showed HP phenomenon on single-photon emission computed tomography just after stenting, and 1 patient (11%) developed status epilepticus owing to HP. In the SAP group, none of the 8 patients treated by SAP or the 1 patient who required stent placement during the first stage owing to a wall dissection developed postprocedure HP phenomenon or HP syndrome.
Conclusion:
SAP decreased the HP phenomenon on single-photon emission computed tomography after performing these procedures in selected patients. Although additional intervention is needed, SAP is considered a relatively simple and effective method to avoid HP in patients at high risk of HP after carotid revascularization.
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