Tortuous Common Carotid Artery Research Articles

Discrepancies in clavicle-to-carotid bifurcation length measurements for transcarotid artery revascularization using different imaging modalities

ObjectiveTranscarotid artery revascularization (TCAR) has emerged as an effective method for carotid artery stenting. However, anatomic eligibility for TCAR is most often limited by an inadequate clavicle-to-carotid bifurcation length of <5 cm. Preoperative clavicle-to-carotid bifurcation distances may be underestimated when using conventional straight-line measurements on computed tomographic angiography (CTA) imaging. We therefore compared clavicle-to-carotid bifurcation lengths as measured by straight-line CTA, center-line CTA, and intraoperative duplex ultrasound (US), to assess potential differences. MethodsWe conducted a single-center, retrospective review of consecutive TCAR procedures performed between 2016 and 2019 for atherosclerotic carotid disease. For each patient, we compared clavicle-to-carotid bifurcation lengths measured by straight-line CTA, center-line CTA using TeraRecon image reconstruction, and intraoperative duplex US with neck extension and rotation. We further assessed patient and imaging characteristics in individuals with a ≥0.5 cm difference among the measurement methods. In particular, common carotid artery (CCA) tortuosity, defined as the inability to visualize the entire CCA from clavicle to carotid bifurcation on both a single coronal and sagittal imaging cut, was examined as a contributing factor for these discrepancies. ResultsOf the 70 TCAR procedures identified, 46 had all three imaging modalities available for review. The median clavicle-to-carotid bifurcation length was found to be 6.4 cm (interquartile range [IQR], 5.4-6.7 cm) on straight-line CTA, 7.0 cm (IQR, 6.0-7.5 cm) on intraoperative duplex US, and 7.2 cm (IQR, 6.5-7.5 cm) on center-line CTA (P < .001). Patients with a ≥0.5 cm difference between their straight-line CTA and either their intraoperative duplex US or center-line CTA measurements were more likely to have tortuous CCAs (60.0% vs 19.1%; P = .01; 51.4% vs 0.0%; P = .01). There were no notable differences in age, gender, prior neck/cervical spine surgery, or neck immobility among these individuals. In patients with tortuous CCAs, duplex US and center-line CTA measurements added 1.0 cm (IQR, 0.6-1.5 cm) and 1.1 cm (IQR, 0.9-1.6 cm) more in length than straight-line CTA measurements, respectively. There was a strong linear correlation between the additional lengths provided by duplex US measurements and those provided by center-line CTA measurements for each individual within the tortuous CCA group (r = 0.83). ConclusionsThe use of straight-line CTA during preoperative planning can underestimate the clavicle-to-carotid bifurcation lengths in patients undergoing carotid revascularization, particularly in those with tortuous CCAs. Both duplex US performed with extended-neck surgical positioning and center-line CTA provide similar and longer carotid length measurements, and should be utilized in patients with tortuous carotid vessels to better determine TCAR anatomic eligibility.

Transcarotid artery revascularization (TCAR) – first experience

Abstract Objective In transcarotid artery revascularization (TCAR) the carotid stent used to treat carotid artery stenosis is introduced via a cut-down to the common carotid artery (CCA). Stent placement is performed during flow reversal using an external shunt to the femoral vein. The advantages compared to transfemoral carotid stenting are that the risks of embolization from the aortic arch and origin of the arch vessels are avoided and that clamping of the common carotid artery allows complete flow-reversal during stent placement. TCAR was developed in 2015 and is extensively used predominately in the USA. To our knowledge, TCAR has until now not been used in Switzerland. We present our first experience with TCAR. Methods Retrospective analysis of consecutive patients. Results We treated 4 patients with TCAR from Dec 2019 to May 2020. All patients were male, median age was 66y. All had high-grade internal carotid artery (ICA) stenosis (3 asymptomatic, 1 symptomatic). All procedures were performed in a hybrid operation room. Technical success was achieved in 3 patients. In these patients there was no peri-interventional stroke or TIA and duplex sonography 6 months postoperatively showed a patent stent without restenosis. In the fourth patient previous attempted transfemoral stenting for symptomatic ICA-stenosis had failed because of a very tortuous CCA. During TCAR, puncture of the CCA was difficult because of atherosclerotic thickening of the vessel wall, furthermore the tip of the guidewire for insertion of the dedicated sheath into the CCA needed to be placed in the CCA rather than in the external carotid artery (ECA) because of ECA occlusion. This led to inadvertent crossing of the stenosis with the guide wire. The procedure was abolished and converted to a conventional carotid endarterectomy. The patient had a perioperative minor stroke with signs of embolization into branches of the medial cerebral artery. He underwent transfemoral intracranial thrombectomy and eventually recovered with only minor deficits. Conclusion Our first experience with TCAR confirmed that patient selection is important: A combination of atherosclerotic disease of the CCA and occlusion of the ECA, both in themselves only relative contraindications to TCAR, led to technical failure and perioperative stroke. With good patient selection TCAR could be performed safely.

Visible bigeminal pulses with tortuous common carotid artery

An 84-year-old woman with a history of hypertension, diabetes mellitus, dyslipidaemia and aortic stenosis (AS) was referred to our hospital for transcatheter aortic valve implantation (TAVI). She occasionally recognised dyspnoea...

Dolichoarteriopathia of Bilateral Common Carotid Artery Presenting as Mass in Pyriform Fossae Causing Dysphagia: An Anatomical Anomaly.

A rare case of aberrant tortuous common carotid artery (dolichoarteriopathia) presenting as submucosal swellings in bilateral pyriform sinuses, non-pulsatile, mimicking submucosal growths in an elderly female with complaints of dysphagia for solids, is described. CT with contrast by the radiologist opined the swellings as common carotid dolichoarteriopathia. We discussed the presentation of the anomaly in head and neck briefly by reviewing the literature and the hazards of biopsy in such a situation. Flexible fibreoptic videoendoscopy, CT with contrast of the head and neck, and the radiologist's opinion gave the clue to diagnosis. The non-pulsatile masses in the pyriform sinuses, is intriguing and minimally invasive procedure like biopsy would have been fatal. One should be careful in dealing with such non-pulsatile submucosal swellings in the laryngopharynx without proper investigations. Anomalies of common carotid artery (CCA) are rare in clinical experience. Choi et al. (Eur Arch Otorhinolaryngol 255(5):269-270, 1998) reported tortuous CCA in neck dissection for cancer but in clinical practice, the abnormal course of CCA presenting in pyriform sinus is extremely rare.

Trials and Frontiers in Carotid Endarterectomy and Stenting.

Based on the strength of randomized trials from the 1990s, major societal guidelines recommend carotid endarterectomy (CEA) for severe (≥70%), symptomatic carotid stenosis if an operative stroke/death rate of <6% can be maintained (history and major trials in carotid revascularization are summarized in the online-only Data Supplement).1–4 Though the benefit is less evident, most guidelines also recommend consideration of CEA for 50% to 69% symptomatic stenosis.2–4 There are subtle differences in recommendations regarding carotid artery stenting (CAS) in symptomatic patients. Some guidelines stipulate that CEA should be preferred over CAS in patients with severe (≥70%) symptomatic carotid stenosis,2,5 especially if >70 years old,4 whereas others position CAS as an alternative.1,3 Though the risk of operative stroke/death is higher with CAS, major randomized clinical trials (RCTs) report event rates under the recommended 6% cutoff for both treatment modalities. Regarding asymptomatic disease, CEA is recommended for patients with stenosis ≥60% to 70% in highly selected patients as long as operative stroke/death rates <3% can be maintained.1 A predicted life expectancy of at least 3 to 5 years has also been suggested.2 The 3% threshold has been easily met by CEA cohorts in the CREST (Carotid Revascularization Endarterectomy Versus Stenting Trial; 1.4%)6 and the ACT1 (Asymptomatic Carotid Trial; 1.7%),7 suggesting that an even lower threshold may be appropriate. Controversially, some guidelines have recommended that CAS can be considered in highly selected patients with asymptomatic carotid stenosis ≥60% to 70%,1,4,8 whereas others argue that the evidence remains insufficient.2 The lack of consensus in the management of asymptomatic carotid stenosis is reflective of an ongoing need for high-quality RCT data to guide practice. ### CEA Operative Stroke Risk and High Risk Designation Most clinical trials in carotid revascularization have focused …

Tortuous Common Carotid Artery: A Report of Four Cases Observed in Cadaveric Dissections.

A tortuous common carotid artery poses a high risk of injury during tracheotomy. Preoperative diagnosis is therefore important to avoid serious complications. We found four cases of tortuous common carotid artery during an anatomical dissection course for students. The first case was a 91-year-old woman who had bilateral tortuous common carotid arteries without arteriosclerosis. Case 2 was a 78-year-old woman who had bilateral tortuous common carotid arteries without arteriosclerosis. Case 3 was an 86-year-old woman who died from bladder cancer and who also had a right tortuous common carotid artery without arteriosclerosis. Case 4 was an 89-year-old woman who had bilateral tortuous common carotid arteries and a tortuous brachiocephalic artery with severe arteriosclerosis. Case 4 was also examined using computed tomography to evaluate the arteriosclerosis. Computed tomography revealed severe calcification of the vascular wall, which was confirmed in the aortic arch and origins of its branches. In all four cases, the tortuosity was located below the level of the thyroid gland. Based on prior study results indicating that fusion between the carotid sheath and visceral fascia was often evident at the level of the thyroid gland, we speculated that the major region in which tortuosity occurs is at the same level or inferior to the level of the thyroid gland.

Tortuous common carotid artery presenting as a pediatric submandibular neck mass

Tortuous common carotid artery presenting as a pediatric submandibular neck mass

Tortuous common carotid artery presenting as a pediatric submandibular neck mass

Summary Aberrant common carotid artery anatomy is a rare cause of a lateral neck mass in pediatric patients. In this article we present the first reported case of a young boy presenting with a pulsatile submandibular mass due to an aberrant common carotid artery. Although there are many causes of carotid artery tortuosity, no specific syndrome or specific diagnosis associated with the arterial changes was ultimately assigned to this child. Though only conservative medical management was elected, this case illustrates the importance of considering abnormal carotid artery anatomy as a rare, but potential cause of neck mass in the pediatric patient.

Tortuous common carotid artery as a cause of dysphagia

Dysphagia lusoria can be caused by any type of vascular ring1 but is commonly associated with an aberrant left or right subclavian artery, a right aortic arch or a common carotid artery aneurysm.2

Tortuous Common Carotid Artery as a Cause of Dysphagia

Tortuous Common Carotid Artery as a Cause of Dysphagia

Tortuous common carotid artery encountered during neck dissection

Anomalies of the carotid artery are rare in clinical experience. To our knowledge a tortuous common carotid artery with an abnormal course encountered during neck dissection has never been reported in the available world literature. During dissection of the lower neck in a 60-year-old Korean man, a tortuous right common carotid artery was found to cross over the lower cervical trachea anteriorly and then was positioned in its usual site in the carotid sheath in the mid-neck.

TORTUOUS COMMON CAROTID ARTERY SIMULATING A THYROID ADENOMA.

A TORTUOUS right common carotid artery was first described as a pathological entity by Coulson in 1852. 1 One hundred years later Deterling cited 68 cases from the literature and reported an additional 21 cases of his own. 2 Since 1952 several other cases have been reported. 3, 4 The lesion occurs almost exclusively in women of middle age who are hypertensive or arteriosclerotic. The patient presents with a mass, usually pulsatile, in the base of the right side of the neck, which must be differentiated from aneurysm of the common carotid artery. Fortunately, such aneurysms are unusual. 5 When the mass is not pulsatile, differential diagnosis is more complicated and the possibility of a neoplasm must be considered. The case here reported is unique, in that the tortuous common carotid artery had clinical and scintographic characteristics of a solitary thyroid adenoma. Report of a Case The patient, a 57-year-old