Significant Carotid Artery Research Articles

Significance of myeloperoxidase, pentraxin-3 and soluble urokinase plasminogen activator receptor determination in patients with moderate carotid artery stenosis

We investigated serum concentrations of specific inflammatory parameters in patients with significant carotid artery stenosis (CAS) of 50–99%, with an additional focus on patients with moderate stenosis (50–69%), in terms of both symptomatic status and plaque morphology, to determine whether there are certain parameters that can be associated with plaque instability before the progression of CAS to a high degree. The study included 119 CAS patients, 29 of whom had moderate stenosis, and 46 controls. Ultrasonography of the carotid arteries was performed using color flow Doppler and B-mode duplex ultrasound, and serum inflammatory parameters were measured using commercially available enzyme immunoassays. When comparing patients with 50–99% stenosis, only serum amyloid A (SAA) was higher in symptomatic patients, while in the group of patients with 50–69% stenosis, myeloperoxidase (MPO) was higher and pentraxin-3 (PTX-3) was lower in symptomatic compared to asymptomatic patients, and soluble urokinase plasminogen activator receptor (suPAR) was higher in patients with carotid plaque of unstable compared to stable morphology. Our results suggest that the importance of different inflammatory parameters in patients with moderate CAS is not the same as in CAS patients in general, and therefore their separate investigation in patients with high and moderate stenosis may be beneficial. SAA has the potential to be further considered in research to predict CAS symptom risk. There is a possibility that MPO and PTX-3 play a role in the development of CAS symptoms originating from less stenotic plaques and that suPAR is involved in the destabilisation of such plaques.

Impact of comorbid coronary artery disease on short and medium-term outcomes after carotid artery stenting

Abstract Background Current recommendations acknowledge carotid artery disease as a clinical criteria for very high cardiovascular risk and carotid artery stenting (CAS) as one of the main therapeutic options for carotid artery stenosis. Carotid artery disease is often present in patients with coronary artery disease (CAD), presumably enhancing the cardiovascular risk of these patients. In this study, we aimed to appraise the prevalence and prognostic effects of comorbid CAD diagnosis in patients with significant carotid artery disease undergoing CAS. Methods We conducted a single-center retrospective analysis including consecutive patients that underwent CAS, between January 2007 and August 2023. Our main objective was to analyze the association of comorbid CAD in patients undergoing CAS, regarding 30-day major adverse cardiovascular events (MACE), 30-day global mortality, 1-year global mortality and major periprocedural complications. On a second perspective, we strived to identify if there was any modifiable factor that influenced worse outcomes in these populations, addressed by a Chi-Square Test. Data was collected by the medical team in our Centre, over the years of follow-up. Results A total of 380 patients were enrolled in this study, with a mean age of 72.1±8.3 years and no major differences concerning demographic characteristics. Based on the presence of previous CAD diagnosis, there was no statistical significance in 30-days MACE (p=0.442), 30-days global mortality (p=0.161), 1-year mortality (p=0.658) or periprocedural complications (p=0.062). Despite these results, there was a statistically significant difference in individuals with CAD and comorbid hypertension in 30-days CV death (p=0.002), 30-days global mortality (p=0.007) and 1-year global mortality (p=0.036). Conclusions Comorbid CAD in patients undergoing CAS due to carotid stenosis does not seem to be significantly associated with medium-term adverse events. Nevertheless, the results of this casuistry support the importance of rigorous blood pressure control in patients with significant carotid artery disease.Baseline CharacteristicsStudy outcomes

Derivation of a clinical prediction score for the diagnosis of clinically significant symptomatic carotid artery disease.

Emergent vascular imaging identifies a subset of patients requiring immediate specialized care (i.e. carotid stenosis > 50%, dissection or free-floating thrombus). However, most TIA patients do not have these findings, so it is inefficient to image all TIA patients in crowded emergency departments (ED). Our objectives were to derive and internally validate a clinical prediction score for clinically significant carotid arterydisease in TIA patients. This was a planned secondary analysis of a prospective cohort study from 14 Canadian EDs. Among 11555 consecutive adult ED patients with TIA/minor stroke symptoms over 12 years, 9882 had vascular imaging and were included in the analysis. Our main outcome was clinically significant carotid artery disease, defined as extracranial internal carotid stenosis ≥ 50%, dissection, or thrombus in the internal carotid artery, with contralateral symptoms. Of 9882 patients, 888 (9.0%) had clinically significant carotid artery disease. Logistic regression was used to derive a 13-variable reduced model. We simplified the model into a score (Symcard [Symptomatic carotid artery disease] Score), with suggested cut-points for high, medium, and low-risk stratification. A substantial portion (38%) of patients were classified as low-risk, 33.8% as medium risk, and 28.2% as high risk. At the low-risk cut-point, sensitivity was 92.9%, specificity 41.1%, and diagnostic yield 1.7%. This simple score can predict carotid artery disease in TIA patients using readily available information. It identifies low-risk patients who can defer vascular imaging to an outpatient or specialty clinic setting. Medium-risk patients may undergo imaging immediately or with slight delay, depending on local resources. High-risk patients should undergo urgent vascular imaging.

Improved cognition and preserved hippocampal fractional anisotropy in subjects undergoing carotid endarterectomy “CEA preserves cognition & hippocampal structure”

ObjectivesA growing body of data indicates that extracranial carotid artery disease (ECAD) can contribute to cognitive impairment. However, there have been mixed reports regarding the benefit of carotid endarterectomy (CEA) as it relates to preserving cognitive function. In this work, diffusion magnetic resonance imaging (dMRI) and neurocognitive testing are used to provide insight into structural and functional brain changes that occur in subjects with significant carotid artery stenosis, as well as changes that occur in response to CEA. Materials and MethodsThe study design was a prospective, non-randomized, controlled study that enrolled patients with asymptomatic carotid stenosis. Thirteen subjects had severe ECAD (≥70% stenosis in at least one carotid artery) and were scheduled to undergo surgery. Thirteen had asymptomatic ECAD with <70% stenosis, therefore not requiring surgery. All subjects underwent neurocognitive testing using the Montreal Cognitive Assessment test (MoCA) and high angular resolution, multi-shell diffusion magnetic resonance imaging (dMRI) of the brain at baseline and at four-six months follow-up. Changes in MoCA scores as well as in Fractional anisotropy (FA) along the hippocampus were compared at baseline and follow-up. ResultsAt baseline, FA was significantly lower along the ipsilateral hippocampus in subjects with severe ECAD compared to subjects without severe ECAD. MoCA scores were lower in these individuals, but this did not reach statistical significance. At follow-up, MoCA scores increased significantly in subjects who underwent CEA and remained statistically equal in control subjects that did not have CEA. FA remained unchanged in the CEA group and decreased in the control group. ConclusionsThis study suggests that CEA improves cognition and preserves hippocampal white matter structure compared to control subjects not undergoing CEA.

Optimizing Treatment of Significant Carotid Artery Stenosis in Times of Logistic Restraints as a Result of COVID-19 Pandemic

BackgroundCOVID-19 confronted medical care with many challenges. During the pandemic, several resources were limited resulting in renouncing or postponing medical care like carotid endarterectomy (CEA) for patients with significant carotid artery stenosis. Although according to international guidelines CEA is the first choice, carotid artery stenting (CAS) could potentially be a reasonable alternative especially during logistical restraints. PurposeTo evaluate outcomes of CAS versus CEA before, during and after the COVID-19 pandemic. Our hypothesis was that a CAS first approach yielded comparable outcomes compared to a CEA first approach. MethodsRetrospective analysis of consecutive patients with significant carotid artery stenosis treated with CEA or CAS between September 2018 and March 2023. Each consecutive period of 1.5 year marked a new (treatment) period: pre-COVID (CEA first strategy), during COVID (CAS first strategy) and post COVID (patient tailored approach). Primary outcome was the composite endpoint of stroke, TIA or death within 30 days. Secondary outcome consisted of the rate of technical success, cerebral hyperperfusion syndrome, myocardial infarction or other cardiac complications needing intervention, bleeding of the surgical site needing intervention, nerve palsy, unintended IC admission, pseudoaneurysm, restenosis or occlusion. ResultsA total of 318 patients were included. Out of 137 patients treated with CEA, 55, 36 and 46 were treated pre-COVID, during COVID and post-COVID, respectively. Out of 181 CAS procedures, 38, 59 and 84, respectively, were performed in each time period. Primary outcome occurred in 5.5%, 0% and 2.2% in the CEA group and 0%, 1.7% and 3.6% in the CAS group (p = .27; p = 1.00; p = 1.00, respectively). Overall technical success was 100% for CEA and 99.4% for CAS (p = 1.00). Rate of restenosis was the only secondary outcome measure which was significantly better after CAS compared to CEA in the pre- and post-COVID period (CEA vs CAS, 12.7% vs 7.9% and 23.9% vs 4.8% with a p-value of .03 and .03, respectively). Hospital presentation to treatment interval did not differ significantly during the pandemic. ConclusionOutcomes were comparable between CAS versus CEA in patients with significant carotid artery stenosis before, during and after the COVID-19 pandemic. CAS showed better results in terms of other complications (i.e., restenosis rate) in the pre- and post-COVID period compared to CEA. Our results may support a CAS first approach when no relevant contra-indications exist without exposing the patient to complications associated with an open surgical approach. Discussion in a multidisciplinary team is advised.

Factors Associated with High-Risk Plaque Characteristics Among Patients with Medium to Severe Carotid Artery Stenosis

ObjectiveThere has been a large discussion in literature regarding the proper management of asymptomatic patients with significant carotid artery stenosis (CAS). This study aims to identify potential risk factors associated with high-risk carotid plaques. MethodsThis is a retrospective study based on a prospective database. Eligible patients had medium to severe symptomatic or asymptomatic carotid stenosis (≥50%, NASCET criteria). This study will analyze patients recruited by our institution as part of the multicenter TAXINOMISIS project (NCT03495830). According to protocol, all patients underwent a colored Duplex ultrasound examination and a magnetic resonance angiography (MRA) at baseline. Carotid plaques were classified according to Gray-Weale ultrasonographic criteria (Types I-V). Main outcomes included the occurrence of symptoms, the high/low echogenicity of the plaque, the existence of intraplaque hemorrhage (IPH) and the existence of lipidic/necrotic core. Secondary, risk factors associated with the aforementioned outcomes were evaluated. ResultsA total of 62 patients (mean age: 68.7+/-9.3 years, 66.1% males, 24.2% symptomatic) were recruited by our department. Mean carotid stenosis was 70.81%±13.53%. In multivariate regression analysis, CRP > 2mg/l was strongly associated with symptomatic stenosis (OR=9.92 [1.12-88.178]; P=0.039), and low HDL levels (<1200mmol/l) were associated with lipidic/necrotic plaque core (OR=16.88 [1.10-259.30]; P=0.043). Low HDL levels (OR=7.22 [1.00-51.95], P=0.049) and HbA1c >7% (OR=0.08 [0.01-0.93], P=0.044) were associated with type III/IV plaques whereas HgAbc1 >7% (OR=14.26 [1.21-168.34], P=0.035) was associated with Type V plaques. ConclusionsThis preliminary study has revealed some potential risk factors associated with unstable carotid plaques. This data could help the future development of prognostic models in order to early detect patients that could benefit from further intervention.

Quantitative flow ratio for the functional assessment of extracranial internal carotid artery stenosis.

In asymptomatic patients presenting with significant internal carotid artery (ICA) stenoses undergoing endovascular revascularization, a selective angiography before stenting (CAS) is required. Sometimes, angiographic findings could be discordant from non-invasive assessment and a tool able to evaluate functional relevance of the stenosis could be of value. We sought to evaluate the usefulness of quantitative flow ratio (QFR) as angiography-based tool for functional assessment of ICA stenoses. We prospectively enrolled 50 asymptomatic patients undergoing CAS. Peak systolic velocity (PSV, cm/s) assessed at color Doppler echocardiography was used to identify significant stenoses (PSV >125 cm/s). At angiography, assessment of ICA stenosis was obtained visually (%DS<inf>VISUAL</inf>) and according NASCET criteria (%DS<inf>NASCET</inf>). Stenoses were considered significant if >60%. After exclusion of 20 vessels, QFR, area stenosis (AS, %) and minimal lumen area (MLA, mm2) were obtained in the remaining 80 vessels. At linear regression analysis, QFR significantly correlated with PSV (r2=0.52, P<0.001) as well as with %DS<inf>NASCET</inf> (r2=0.68, P<0.001) and %DS<inf>VISUAL</inf> (r2=0.71, P<0.001). Using PSV as reference, QFR showed good accuracy to predict functionally significant stenosis (AUC=0.98, P<0.001) with a cut-off value of 0.93. As compared with %DS<inf>NASCET</inf> and %DS<inf>VISUAL</inf>, QFR showed a significantly higher accuracy (61% vs. 73% vs. 94%, respectively; P<0.05), sensitivity (43% vs. 61% vs. 93%, respectively; P<0.05) and negative predictive value (46% vs. 51% vs. 85%, respectively; P<0.05) for detecting hemodynamically significant ICA stenoses. This study suggest the potential benefit of adopting QFR for functional assessment of extracranial ICA stenoses. These data should be validated in larger studies.

Prevalence of carotid artery stenosis and intra-cranial lesions in patients with aortic arch aneurysm and its association with intraoperative regional cerebral oxygen saturation and postoperative neurological outcomes.

Although aortic aneurysm is associated with vascular aging and atherosclerosis, carotid and intracranial vascular disease prevalence in patients with aortic arch aneurysm remains unclear. Similarly, the effect of carotid and intracranial lesions on postoperative outcomes is unknown. This study aimed to investigate the prevalence of carotid artery stenosis and intracranial lesions in patients with aortic arch aneurysm and its association with intraoperative regional cerebral oxygen saturation (rScO2) and postoperative neurological outcomes, including delirium and cerebral infarction. This retrospective observational study included 133 patients with true aortic arch aneurysm who underwent preoperative magnetic resonance imaging (MRI). We evaluated the prevalence of carotid and intracranial arterial lesions. Symptomatic cerebral infarction and delirium, defined by the confusion assessment method for the intensive care unit, were evaluated for their association with preoperative cerebrovascular lesions. Additionally, changes in regional saturation of the cerebral tissue at different surgical phases were evaluated for patients with and without cerebrovascular lesions. Fifteen (11.3%) patients experienced symptomatic cerebral infarction, and 64 (48.1%) had postoperative delirium. Preoperative MRI showed old infarction, microbleeds, significant carotid artery stenosis, and intracranial lesions in 21.1%, 14.3%, 10.5%, and 7.5% of the patients, respectively. White matter hyperintensities with Fazekas scale 2 were observed in 40.6% of the patients, while Fazekas scale 3 were observed in 18.8% of the patients. Preoperative MRI findings and postoperative neurological outcomes were not significantly different. Seventy-six patients underwent rScO2 monitoring intraoperatively. Changes in rScO2 in patients with and without carotid/cerebrovascular lesions were not significantly different. However, rScO2 was significantly lower in patients who developed cerebral infarction. Significant carotid artery stenosis and intracranial lesions were observed in 10.5% and 7.5% of the patients, respectively. Although preoperative MRI findings and changes in rScO2 or postoperative outcomes showed no significant association, patients with postoperative cerebral infarction showed significantly lower rScO2 intraoperatively.

Urgent Carotid Endarterectomy for Stroke: A Case Report

Urgent carotid endarterectomy (CEA) is beneficial in patients with non-disabling stroke or transient ischemic attack and significant ipsilateral carotid artery stenosis. It is recommended to be performed within 2-4 weeks of the event; however, its safety when done within 48 hours is still under investigation with potential risks of recurrent ipsilateral stroke and death being reported. This case highlights that urgent CEA done within 48 hours can result in significant neurological improvement. NICE advises within 48 hours of diagnosis and &lt;7 days of radiological imaging while some large studies- especially a Swedish study of &gt;2000 patients concluded an increased risk of stroke and death when performed within 48 hours. Evidence is still developing. In selected cases, this timely intervention can be the standard of care in the Caribbean setting in keeping with international best practice.

Abstract 2029: Augmenting Mitochondrial Respiration In Immature Smooth Muscle Cells Is A Therapeutic Target For Moyamoya-like Cerebrovascular Disease

Introduction: Moyamoya disease (MMD), characterized by occlusive lesions in the distal internal carotid arteries, is a malignant cause of pediatric stroke. Surgical revascularization is the mainstay treatment, but peri- and postoperative ischemic complications are common. Multiple identified genes account for only a small percentage of cases. Identifying a common pathway of disease pathogenesis would enhance care for MMD patients. Goal and Approach: We used cellular and animal models for a rare cause of MMD-like cerebrovascular disease, heterozygous ACTA2 p.R179 pathogenic variants, to define molecular mechanisms and assess therapeutic strategies. Our prior work showed that smooth muscle cells (SMCs) with ACTA2 p.R179 variants are incompletely differentiated. We hypothesized that these immature phenotypes could be rescued by manipulation of cellular metabolism. We validated our results with cellular models of other pediatric MMD-associated variants: loss-of-function variants in Pcnt (explanted from a mouse model) and a pathogenic variant in RNF213 (generated via Crispr/Cas9 in human iPSCs). Results: Acta2 SMC-R179C/+ SMCs have increased glycolysis and reduced oxidative respiration on Seahorse analyses. Molecular characterization showed that Acta2 SMC-R179C/+ SMCs have reduced mitochondrial mass and decreased complex I activity, which is rescued by nicotinamide riboside (NR) treatment. NR surprisingly also increases SMC differentiation and decreases migration. Acta2 SMC-R179C/+ mice and littermate controls were subjected to carotid artery ligation, and 33% of Acta2 SMC-R179C/+ mice died due to strokes while all control mice survived (Kaplan-Meier p&lt;0.01). Surviving Acta2 SMC-R179C/+ mice have significant cerebrovascular remodeling and persistent occlusive carotid artery lesions. Treatment with NR reduces death (Kaplan-Meier p=0.08) and resolves persistent lesions (p&lt;0.05) in Acta2 SMC-R179C/+ mice after carotid ligation. Pcnt and RNF213 mutant SMCs have a similar phenotype of incomplete differentiation and decreased mitochondrial respiration as ACTA2 p.R179 and are responsive to NR treatment. Conclusions: These data provide evidence for a common and therapeutically targetable pathway in pediatric MMD patients.

Evaluation of Burden of Carotid Artery Disease In Ischemic Stroke Patients With And Without Hypertension

Evaluation of Burden of Carotid Artery Disease In Ischemic Stroke Patients With And Without Hypertension

Non-Invasive Tools in Perioperative Stroke Risk Assessment for Asymptomatic Carotid Artery Stenosis with a Focus on the Circle of Willis.

This review aims to explore advancements in perioperative ischemic stroke risk estimation for asymptomatic patients with significant carotid artery stenosis, focusing on Circle of Willis (CoW) morphology based on the CTA or MR diagnostic imaging in the current preoperative diagnostic algorithm. Functional transcranial Doppler (fTCD), near-infrared spectroscopy (NIRS), and optical coherence tomography angiography (OCTA) are discussed in the context of evaluating cerebrovascular reserve capacity and collateral vascular systems, particularly the CoW. These non-invasive diagnostic tools provide additional valuable insights into the cerebral perfusion status. They support biomedical modeling as the gold standard for the prediction of the potential impact of carotid artery stenosis on the hemodynamic changes of cerebral perfusion. Intraoperative risk assessment strategies, including selective shunting, are explored with a focus on CoW variations and their implications for perioperative ischemic stroke and cognitive function decline. By synthesizing these insights, this review underscores the potential of non-invasive diagnostic methods to support clinical decision making and improve asymptomatic patient outcomes by reducing the risk of perioperative ischemic neurological events and preventing further cognitive decline.

Assessment of atherosclerotic plaque morphology using contrast-enhanced ultrasound and its impact on primary cardiovascular events following simultaneous carotid endarterectomy and coronary artery bypass grafting.

The incidence of stroke after on-pump cardiac surgery during the perioperative period can affect up to 2% of patients, and is frequently linked to carotid artery disease. Notably, in patients with significant unilateral carotid artery stenosis of 80%-99%, the risk of stroke reaches 4%. Among individuals undergoing coronary artery bypass grafting (CABG), 3% to 10% exhibit significant carotid artery stenosis. To mitigate the risk of stroke and mortality, patients can undergo either simultaneous or staged carotid endarterectomy and CABG. The aim of this study was to assess whether early postoperative complications, including stroke, following simultaneous CABG/CAE procedures, correlate with morphological attributes of carotid plaque, assessed via contrast-enhanced ultrasound. A single centre retrospective analysis was performed including 62 patients who underwent simultaneous CABG/CEA between 2019 and 2022. Our study excluded patients who underwent staged carotid endarterectomy and CABG procedures, off-pump CABG, or those necessitating urgent CABG. Our analysis focused on patients meeting elective CABG criteria, diagnosed with symptomatic triple-vessel or left main trunk coronary artery disease (CAD), alongside asymptomatic carotid stenosis (a. carotis internae) exceeding 70% or symptomatic ipsilateral carotid stenosis surpassing 50%. The extent of contralateral carotid artery stenosis was not taken into account. Prior to the CEA/CABG procedure, each patient underwent contrast-enhanced ultrasound to assess atherosclerotic lesions, which were classified using Nakamura et al.'s classification. Among the patients, 37.1% exhibited no neovascularisation within the atherosclerotic plaque, 56.5% showed insignificant neovascularisation, and 6.5% displayed notable neovascularization within the plaque. Our study aimed to establish a connection between the degree of plaque vascularisation identified through contrast-enhanced ultrasound and subsequent postoperative complications. Upon evaluating postoperative complications occurring within 30 days after the surgery and the plaque morphology identified through contrast-enhanced ultrasound, a statistically significant correlation was observed between a higher grade of plaque vascularisation and the occurrence of ischaemic stroke (r = 0.329, p = .008). Monte Carlo calculations of the Chi-square test indicated a significant association between a higher grade of plaque vascularisation and the presence of peripheral artery disease (χ2 = 15.175, lls = 2, p = .003). Within 30 days of surgery, a significant correlation exists between the occurrence of ischaemic stroke following carotid endarterectomy subsequent to CABG and the presence of a higher grade plaque vascularisation as identified by contrast-enhanced ultrasound.

Diagnostic Accuracy of Duplex Ultrasonography Versus Computed Tomographic Angiography in the Detection of Significant Carotid Artery Atherosclerosis

Objective: To determine the diagnostic accuracy Duplex of Ultrasonography in detecting clinically significant carotid atherosclerosis by keeping Computed Tomographic Angiography as a gold standard. Study Design: Cross-Sectional study Place and Duration of Study: Armed Forces Institute of Radiology and Imaging Rawalpindi Pakistan, from Jun to Nov 2019. Methodology: All patients referred with neurological symptoms during the study were included. Duplex (Doppler) ultrasound and Computed Tomographic Angiography of bilateral carotid arteries were performed on all these patients. The percentage of carotid stenosis was calculated for both modalities. Data was recorded separately for both right and left carotid arteries. Results: Out of 170 carotid arteries in 85 patients, Duplex ultrasound supported the diagnosis of clinically significant carotid atherosclerosis in 89 arteries (52.3%), and CTA confirmed it in 86 arteries (50.5%). Overall, the sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy of Duplex ultrasonography in the detection of clinically significant carotid atherosclerosis by taking computed tomographic angiography (CTA) as a gold standard was 92.0%, 89.0%, 89.8%, 92.5% and 91.1% respectively Conclusion: Duplex ultrasonography is an accurate, non-invasive imaging investigation for detecting carotid atherosclerosis.

Association of Higher Hemoglobin Level With Significant Carotid Artery Plaque in the General Population.

Serum hemoglobin (Hb) level affects the viscosity of blood. Several studies have reported that Hb level is associated with adverse cardiovascular outcome. However, there is a paucity of evidence on the association between serum Hb level and the risk of subclinical atherosclerosis. Thus, the objective of this study was to investigate the relationship between Hb level and risk of carotid plaque in a health checkup cohort. This retrospective study analyzed a total of 3,805 individuals without history of cardiovascular disease (CVD) who underwent carotid ultrasonography (USG) between January 2016 and June 2018. Participants were divided into 4 groups based on Hb quartiles in each of male and female. Carotid plaque score was calculated based on USG reports. Multivariable logistic regression analysis was performed for each index of quartile groups regarding the risk of carotid plaque. Of 3,805 individuals (mean age, 52.62±10.25 years; 2,674 [70.28%] males), mean Hb level was 15.11±0.75 g/dL in male and 13.35±0.74 g/dL in female. When the Q1 group was compared to the Q4, increasing quartile of Hb was associated with the presence of significant carotid plaque (plaque score ≥3) in male (adjusted odds ratio [OR], 1.538; 95% confidence interval [CI], 1.182-2.001; p=0.001) and female (adjusted OR, 1.749; 95% CI, 1.058-2.676; p=0.01). A high Hb level is associated with an increased risk of carotid plaques in individuals without history of CVD. This finding may support the need for early screening of CVD in individuals with high Hb levels.

Carotid endarterectomy compared with carotid artery stenting for extracranial carotid artery stenosis: a retrospective single-centre study

Aim: One of the main risk factors for an ischemic stroke is significant carotid artery stenosis, and extracranial severe carotid artery stenosis accounts for 20% of ischemic strokes. Prior to the development of carotid artery stenting (CAS), the only effective and reliable treatment for carotid artery stenosis was carotid endarterectomy (CEA). This study compares the results of CAS and CEA in patients with significant carotid artery stenosis. Methods: Between 2018 and 2022, hospital records of all patients who underwent carotid artery revascularization at the institution were retrospectively analyzed. Patients were divided into two groups depending on whether CEA or CAS was performed for carotid revascularization. Propensity score matching was performed to reduce bias by equating the baseline clinical characteristics of the groups. To compare 30-day, 1-year, and long-term outcomes, rates of transient ischemic attack (TIA), myocardial infarction, stroke, all-cause mortality, and composite endpoints were analyzed. Results: After PSM, 76 patients each in the CEA and CAS groups were compared. The mean age was 69.80 years ± 11.35 years and 121 (80%) were male. The patients were followed up for a mean of 33 months ± 6 months. The incidence of TIA in the perioperative period [9 (12%) vs. 4 (5%); P &lt; 0.05], TIA and composite endpoint at 1-year period [11 (15%) vs. 2 (3%); P &lt; 0.05 and 27 (36%) vs. 16 (21%); P &lt; 0.05, respectively] were significantly higher in the CAS group than in the CEA group. No difference was observed between the groups in the long-term. Conclusions: There was no noticeable difference between the CEA and CAS groups in the examination of cases with severe carotid artery stenosis in terms of 1-month, and 1-year results (apart from TIA and composite endpoints), or long-term outcomes. Extracranial carotid artery stenosis can be treated safely and effectively also by CAS.

Inflammatory activity of vulnerable plaques in asymptomatic, non-hemodynamically significant carotid artery stenoses: preliminary results of the carotid artery multi-modality imaging prognostic study

Abstract Background [18F]-fluorodeoxyglucose (FDG) positron emission tomography (PET) is a valid technique to quantify carotid plaque inflammation and can improve identification of patients at high risk for stroke. There are few data on the inflammatory plaque activity in asymptomatic patients and of its association with other characteristics of plaque vulnerability. Purpose To assess the inflammatory carotid plaque activity and its correlations with patient characteristics and features of plaque vulnerability detected by other imaging techniques in a population of patients with asymptomatic mild/moderate degree of stenosis. Methods Seventy-five asymptomatic patients with 40-60% unilateral carotid stenosis at Doppler ultrasound (DUS) were prospectively evaluated with [18F]FDG-PET, computed tomography angiography (CTA), and magnetic resonance angiography (MRA). Regions of interests were drawn using fused PET/CT slices on the most diseased segment (MDS), defined as the single hottest slice of [18F]FDG uptake. Background blood pool activity was obtained from regions of interests placed in the lumen of the jugular vein. The target-to-background ratio (TBR) was calculated by dividing maximum standardized uptake value (SUVmax) of the MDS to SUVmax of ipsilateral blood pool activity. Plaque vulnerability was defined as the presence of an echolucent plaque at DUS, plaque ulceration at CTA, intraplaque hemorrhage, and lipid-rich necrotic core at MRA. Results Patients with a TBR ≥median (1.75), compared with those below the median, were significantly more frequently male and on statin therapy, had higher prevalence of ulcerated plaque at CTA (61% vs 35%, p=0.03) and intraplaque hemorrhage at MRA (33% vs 10%, p=0.03), while the prevalence of a lipid-rich necrotic core at MRA was not significantly different (p=0.16). TBR and SUVmax of the MDS were similar in those with or without a ≥50% stenosis, and peak velocities indices at DUS were not significantly correlated with TBR or SUVmax. Log(TBR) was significantly higher in ulcerated, rather than non-ulcerated, plaque (0.27 vs 0.21, p=0.03) and numerically higher in plaques with an intraplaque hemorrhage (0.22 vs 0.30, p=0.06). Log(TBR) and Log(SUVmax) were similar in plaques with and without a lipid-rich necrotic core (p=0.86 for both). Conclusions Higher TBR or SUVmax, indicating a high inflammatory activity, are associated with an ulcerated plaque and the presence of intraplaque hemorrhage but not with either the degree of stenosis or the presence of a lipid-rich necrotic core.

Carotid Artery Involvement in Patients Undergoing Coronary Angiography with Diabetes Mellitus

Background: Carotid artery disease would be high in patients having coronary artery disease with diabetes mellitus. Objective: The purpose of the present study was to see frequency, pattern and severity of carotid artery disease among patients with IHD and diabetes mellitus. Methodology: This case-control study was conducted in Department of Cardiology, UCC, BSMMU from July, 2007 to June 2009. Total 100 patients were included in this study. Of them 50 patients were coronary artery disease with diabetes mellitus and another 50 patients were coronary artery disease without diabetes mellitus. Both group were underwent coronary and carotid angiography. Coronary artery stenosis is assessed by different scoring system and carotid artery stenosis are categorized as mild (&lt; 50% stenosis) moderate (50-69% stenosis) and critical (&gt;_ 70% stenosis). Moderate and critical stenosis was considered as significant carotid artery disease. Morphological character of the lesion was also assessed. Results: The mean age was found 57.48 years with 6.04 standard deviation (SD) in DM and 55.64 years with 6.34 standard deviation in NDM group and also 56.56 years with 6.49 standard deviation in the whole study population. the indications of CAG were Post MI evaluation, unstable angina, stable angina, chest pain evaluation and positive ETT were 42.0%, 20.0%, 18.0%, 10.0% and 10.0% in DM group and 32.0%, 28.0%, 20.0%, 8.0% and 12.0 in NDM group respectively. LAD was the commonest artery involved (86.0%), followed by RCA (82.0%), LCX (68.0%) and LM (6.0%) in DM study subjects. Among the NDM LAD artery involved (76.0%), followed by RCA (72.0%), LCX (64.0%) and LM (4.0%) in NDM study subjects. Conclusion: In conclusion, patients of coronary artery disease with diabetic mellitus are having higher frequency and severity of Carotid artery disease than non-diabetic coronary artery disease patients. Journal of National Institute of Neurosciences Bangladesh, January 2023;9(1):30-34

Evaluation of left atrial function by two-dimensional speckle tracking echocardiography in patients with cryptogenic stroke

Abstract Cryptogenic cerebro-vascular stroke is defined as ischemic stroke without definite etiology in spite of complete work up. It differs from embolic stroke of undetermined source (ESUS) which is a subgroup including the cardio-embolic sources.We aimed to evaluate the left atrial function using two-dimensional speckle tracking echocardiography (2D-STE) as a possible cause for cryptogenic stroke or a predictor for subclinical AF.TEE has an important role in the work up of cryptogenic stroke and ESUS searching for a possible cardio-embolic source including PFO, left atrial appendage thrombi and atheromatous plaques in aortic arch. Patients and methods Our retrospective cohort study included 62 patients of both sexes with unexplained cerebro-vascular stroke or TIA in stroke unit of Minia University.After performing TEE, 22 patients were excluded as they were proven to have a possible source for cardio-embolism.So, Participants were divided into two groups, group I which included 40 patients with cryptogenic stroke and group II which included 40 healthy participants with no medical history of significance as a control group.Two-dimensional trans-thoracic echocardiography and speckle tracking echocardiography were performed in both groups. We used LA diameter in PLAX, LA volume index (LAVI), LA ejection fraction (LAEF), LA strain rate during reservoir phase (LASr) and LV diastolic dysfunction as parameters of LA dysfunction.48 hours ECG rhythm monitoring during hospitalization was used in participants of group I for detection of more than 30 s episodes of subclinical or paroxysmal atrial fibrillation.Bilateral carotid duplex ultrasonography was also performed for exclusion of significant carotid artery stenosis as a possible cause for stroke. Results The parameters of LA dysfunction were significantly affected in group I than group II with P-value &amp;lt; 0.0001 for LV diastolic dysfunction, LAVI, LAEF and LASr, and 0.001 for LA diameter in PLAX. Episodes of AF were noticed in 14 patients of group I (group Ia, 35%) and the other 26 patients were called (group Ib, 65%).We compared LA dysfunction parameters in Group Ib and group II (healthy controls). There was significant affection of LV diastolic dysfunction in group Ib than group II with P-value &amp;lt; 0.011. LAVI, LAEF and LASr were significantly affected in group Ib than group II with P-value &amp;lt; 0.0001. While, there is no significant difference in LA diameter between both groups with P-value = 0.053.We found that left atrial strain rate during reservoir phase (LASr) is the most sensitive and specific parameter of left atrial cardiopathy in prediction of AF with cut-off point ≤24.5 % and P-value &amp;lt; 0.0001, then LAEF with cut-off point ≤40.5 % and P-value = 0.011. The LAVI is the least sensitive and specific parameter with cut-off point ≥38.5 ml/m2 and P-value = 0.003. Conclusion 2D-STE has an important role in the evaluation of LA dysfunction as a possible cause for cryptogenic stroke after performing of TEE and exclusion of possible sources for cardio-embolism.LA strain during reservoir phase (LASr) is a strong parameter for LA cardiopathy even before the occurrence of AF.Also, LASr is an independent risk factor for AF. LAEF and LAVI are important as parameters for LA dysfunction and predictors for AF as well but with less sensitivity and specificity than LASr.

Risk of new cerebral ischemic events in patients with symptomatic internal carotid artery stenosis while awaiting carotid stent placement.

Although there is an emphasis on performing carotid artery stent (CAS) placement within 2weeks after index event of transient ischemic attack (TIA) or minor stroke in patients with significant extracranial internal carotid artery (ICA) stenosis, the risks and characteristics of recurrent cerebral ischemic event while waiting for CAS placement are not well defined. We analyzed patients admitted to our institution over a 45-month period with symptomatic extracranial ICA stenosis. We identified any new cerebral ischemic events that occurred between index cerebral or retinal ischemic event and CAS placement and categorized them as TIA and minor or major ischemic strokes. We calculated the risk of new ipsilateral cerebral ischemic events between index cerebral or retinal ischemic event and CAS placement. The mean age of 131 patients analyzed was 67years (range: 47-94 years; 92 were men), and 94 and 37 patients had 70%-99% and 50%-69% severity of stenosis, respectively. The mean and median time intervals between index cerebral or retinal ischemic event and CAS performance were 28 (standard deviation [SD] 30) and 7 (interquartile range 33) days, respectively. A total of 9 of 131 patients (6.9%, 95% confidence interval 2.5%-11.2%) experienced new cerebral ischemic events over 3637 patient days of observation. The risk of new ipsilateral cerebral ischemic events was 2.5 per 1000 patient days of observation. We estimated the risk of new ipsilateral cerebral ischemic events in patients with ICA stenosis ≥50% in severity while waiting for CAS placement to guide appropriate timing of procedure.