Acute hemifacial ischemia as a late complication of carotid stenting

Fate of External Carotid Artery Following Carotid Artery Stenting for Internal Carotid Artery near Occlusion

BACKGROUND

The external carotid artery (ECA) plays a vital role in facial perfusion and acts as a collateral pathway for cerebral blood flow during internal carotid artery (ICA) stenosis. In cases of carotid near-occlusion (CNO), characterized by severe ICA stenosis with hemodynamic changes, carotid artery stenting (CAS) is rising as a potential new treatment. During CAS, the stent is deployed in ICA, covering the ECA orifice. Therefore, this study aims to evaluate the effects of CAS on ECA.

MATERIALS AND METHODS

This retrospective study included 159 patients diagnosed with CNO and treated with CAS between February 2018 and May 2023. Preoperative and postoperative ECA diameters were measured using angiography. Data on patient demographics, procedural details, and outcomes were analyzed.

RESULTS

The median preoperative ECA diameter was 4.34 mm, decreasing to 3.40 mm post-CAS (p < 0.001). ECA narrowing occurred in 76.39% of patients, while 4.17% experienced occlusion. A larger preoperative ECA diameter was predictive of narrowing (odds ratio (OR) = 1.35, p = 0.02) and protective against occlusion (OR = 0.1, p < 0.001). Weak correlations between ICA and ECA diameter changes were observed, indicating procedural influences on ECA dynamics.

CONCLUSIONS

CAS for CNO significantly reduces ECA diameter, with a subset of patients developing occlusion. The preoperative ECA diameter is a key predictor of postoperative changes. These findings emphasize the need for further research on CAS-related ECA hemodynamic alterations to optimize patient outcomes and minimize complications.

Assessment of Facial Pain After Internal Carotid Artery Stenting: The Role of External Carotid Artery Overstenting

Background: The external carotid artery (ECA) supplies blood to various facial and neck regions and may contribute to collateral cerebral perfusion. With the rise in carotid artery stenting (CAS) as a treatment for carotid stenosis, ECA overstenting has become a common procedure feature. This study aimed to assess the incidence, characteristics, and duration of facial pain following CAS, hypothesizing that ECA overstenting may contribute to facial pain. Materials and Methods: This prospective study included 55 patients treated with CAS for internal carotid artery (ICA) stenosis at a single center. Patients' facial pain was evaluated using a numeric rating scale (NRS) before, immediately after, and 24 h post-CAS. Patient data, including demographics, comorbidities, and procedural details, were analyzed to assess the relationship between ICA stenosis degree, ECA diameter changes, and facial pain incidence. Results: CAS was associated with intraoperative facial pain in 27.27% of patients, with 7.28% reporting residual pain 24 h post-procedure. Pain occurrence was significantly higher in patients with lower ICA stenosis (p = 0.04). The median ECA diameter decreased from 4.11 mm to 3.16 mm (p < 0.001) after CAS, with ECA overstenting observed in 96.4% of cases. No significant relationship was found between pain severity and stent width or length. Conclusions: This study highlights that CAS significantly decreases the diameter of ECA. Additionally, ECA overstenting might be associated with perioperative and postoperative facial pain, emphasizing the need for careful monitoring of ECA patency following CAS.

Jaw Claudication Caused by Atherothrombotic External Carotid Artery Occlusion: A Case Report

Jaw claudication is a common symptom of giant cell arteritis (GCA), although atherothrombotic external carotid artery (ECA) occlusion is also known to cause jaw claudication. The patient was a 75-year-old male who experienced severe right jaw pain while chewing solid food. Magnetic resonance (MR) angiography showed right ECA occlusion. Based on laboratory tests and contrast-enhanced computed tomography (CT) angiography, atherothrombosis, not GCA, was suspected to be the cause of jaw claudication. Following conservative therapy with cilostazol, the pain was gradually alleviated in two months, and subsequent MR angiography after four months showed blood flow in the stenosed right ECA. The symptom completely disappeared in six months. Based on a previous report, we expected that jaw claudication will be ameliorated due to the development of collateral supply; however, spontaneous ECA recanalization caused improvement of symptoms in this case.

Recanalization of symptomatic chronic internal carotid artery occlusions by hybrid treatment

OBJECTIVE

To evaluate the efficacy and safety of hybrid revascularization by carotid endarterectomy and endovascular intervention in the treatment of chronic internal carotid artery occlusion (ICAO).

METHODS

We performed a retrospective analysis of patients who received hybrid treatment for symptomatic chronic ICAO between December 2016 and December 2018. Fifty-six patients with long-segment ICAO were enrolled and divided into the short duration (1-3 months) and long ICAO duration (>3 months) groups, and their clinical and angiographic data were analyzed.

RESULTS

The mean duration was 106.8 ± 36.1 days from the date of ICAO diagnosis to revascularization. Totally, 10 patients (17.8%, n = 56) in the short duration group while no patients in the long duration group failed recanalization (n = 7). Perioperative complications included intraoperative thromboembolism in 1 (1.8%) patient and subarachnoid hemorrhage in 2 (3.6%) patients. Early phase postoperative hypertension was noted in 11 (19.6%) patients and cervical hemorrhage in 1 (1.8%) patient. No severe neurological deficits occurred. Overall, the 6-month modified Rankin score, Mini-mental State Examination (MMSE) and Montreal Cognitive Assessment (MoCA) scores in patients with successful recanalization significantly improved versus the baseline (P < 0.05). After successful recanalization, the long duration group demonstrated more stents for revascularization compared with the short duration group (P < 0.05). Five (10.8%) patients had recurrent transient ischemic attack, and 1 (2.2%) patient developed stroke in the successful revascularization group during 6 months of follow-up. ICA restenosis occurred in 5 (8.9%) patients and re-occlusion was noted in 1 (1.8%) patient.

CONCLUSIONS

Hybrid operation may be feasible and effective for patients with symptomatic chronic complete ICAO according to our limited data. The original occlusion site from the carotid bifurcation and the duration of ICAO should be considered as independent indicators for successful recanalization as well as perioperative outcomes.

A Rare Cause of Juvenile Stroke: Extracranial Carotid Artery Aneurysm with Venous Complete Reconstruction of the Carotid Bifurcation

Extracranial carotid artery aneurysms (ECAA) are a rare cause of embolic stroke. The underlying etiology is variable, with atherosclerosis being the most common entity in older subjects. Several treatments have been developed over the last 20 years, but the preferred method remains unknown. Notwithstanding the widespread use of endovascular techniques, surgical reconstruction by means of a bifurcated venous bypass graft should be applied in younger patients. In this way, it is possible to avoid major concerns about the development of long-term intrastent restenosis, and also to spare the external carotid artery which represents the main branch for the ipsilateral cerebral and facial perfusion. We propose ECAA resection and interposition of the inverted great saphenous vein to both the internal and external carotid artery by means the use of a tributary, i.e., the Giacomini vein.