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Fresilli D, Di Leo N, Martinelli O, Di Marzo L, Pacini P, Dolcetti V, Del Gaudio G, Canni F, Ricci LI, De Vito C, Caiazzo C, Carletti R, Di Gioia C, Carbone I, Feinstein SB, Catalano C, Cantisani V. 3D-Arterial analysis software and CEUS in the assessment of severity and vulnerability of carotid atherosclerotic plaque: a comparison with CTA and histopathology. Radiol Med 2022; 127:1254-1269. [PMID: 36114929 PMCID: PMC9587943 DOI: 10.1007/s11547-022-01551-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 08/26/2022] [Indexed: 11/30/2022]
Abstract
Purpose Our purpose is to assess Multiparametric Ultrasound (MPUS) efficacy for evaluation of carotid plaque vulnerability and carotid stenosis degree in comparison with Computed Tomography angiography (CTA) and histology. Material and methods 3D-Arterial Analysis is a 3D ultrasound software that automatically provides the degree of carotid stenosis and a colorimetric map of carotid plaque vulnerability. We enrolled 106 patients who were candidates for carotid endarterectomy. Prior to undergoing surgery, all carotid artery plaques were evaluated with Color-Doppler-US (CDUS), Contrast-Enhanced Ultrasound (CEUS), and 3D Arterial analysis (3DAA) US along with Computerized Tomographic Angiography (CTA) to assess the carotid artery stenosis degree. Post-surgery, the carotid specimens were fixed with 10% neutral buffered formalin solution, embedded in paraffin and used for light microscopic examination to assess plaque vulnerability morphological features.
Results The results of the CTA examinations revealed 91 patients with severe carotid stenoses with a resultant diagnostic accuracy of 82.3% for CDUS, 94.5% for CEUS, 98.4% for 3DAA, respectively. The histopathological examination showed 71 vulnerable plaques with diagnostic accuracy values of 85.8% for CDUS, 93.4% for CEUS, 90.3% for 3DAA, 92% for CTA, respectively.
Conclusions The combination of CEUS and 3D Arterial Analysis may provide a powerful new clinical tool to identify and stratify “at-risk” patients with atherosclerotic carotid artery disease, identifying vulnerable plaques. These applications may also help in the postoperative assessment of treatment options to manage cardiovascular risks.
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Affiliation(s)
- Daniele Fresilli
- Department of Radiological, Oncological, and Pathological Sciences, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy.
| | - Nicola Di Leo
- Department of Radiological, Oncological, and Pathological Sciences, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Ombretta Martinelli
- Department of Surgery "Paride Stefanini'', Vascular and Endovascular Surgery Division, Sapienza University of Rome, Viale del Policlinico 155, 00161, Rome, Italy
| | - Luca Di Marzo
- Department of Surgery "Paride Stefanini'', Vascular and Endovascular Surgery Division, Sapienza University of Rome, Viale del Policlinico 155, 00161, Rome, Italy
| | - Patrizia Pacini
- Department of Radiological, Oncological, and Pathological Sciences, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Vincenzo Dolcetti
- Department of Radiological, Oncological, and Pathological Sciences, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Giovanni Del Gaudio
- Department of Radiological, Oncological, and Pathological Sciences, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Fabrizio Canni
- Department of Radiological, Oncological, and Pathological Sciences, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Ludovica Isabella Ricci
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, 00185, Rome, Italy
| | - Corrado De Vito
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, 00185, Rome, Italy
| | - Corrado Caiazzo
- Breast Service, Local Health Agency of Naples ASL NA1, Naples, Italy
| | - Raffaella Carletti
- Department of Translational and Precision Medicine, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Cira Di Gioia
- Department of Radiological, Oncological, and Pathological Sciences, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Iacopo Carbone
- Department of Radiological, Oncological and Pathological Sciences, Diagnostic Imaging Unit, ICOT Hospital, Sapienza University of Rome, Via Franco Faggiana1668, 04100, Latina, Italy
| | - Steven B Feinstein
- Department of Internal Medicine, Section of Cardiology, Rush University Medical Center, Chicago, IL, USA
| | - Carlo Catalano
- Department of Radiological, Oncological, and Pathological Sciences, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - Vito Cantisani
- Department of Radiological, Oncological, and Pathological Sciences, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
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Baylam Geleri D, Watase H, Chu B, Chen L, Zhao H, Zhao X, Hatsukami TS, Yuan C. Detection of Advanced Lesions of Atherosclerosis in Carotid Arteries Using 3-Dimensional Motion-Sensitized Driven-Equilibrium Prepared Rapid Gradient Echo (3D-MERGE) Magnetic Resonance Imaging as a Screening Tool. Stroke 2021; 53:194-200. [PMID: 34587796 DOI: 10.1161/strokeaha.120.032505] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Two-dimensional high-resolution multicontrast magnetic resonance imaging (2D-MC MRI) is currently the most reliable and reproducible noninvasive carotid vessel wall imaging technique. However, the long scan time required for 2D-MC MRI restricts its practical clinical application. Alternatively, 3-dimensional motion-sensitized driven-equilibrium prepared rapid gradient echo (3D-MERGE) vessel wall MRI can provide high isotropic resolution with extensive coverage in two minutes. In this study, we sought to prove that 3D-MERGE alone can serve as a screening tool to identify advanced carotid lesions. METHODS Two hundred twenty-seven subjects suspected of recent ischemic stroke or transient ischemic attack were imaged using 2D-MC MRI with an imaging time of 30 minutes, then with 3D-MERGE with an imaging time of 2 minutes, on 3T-MRI scanners. Two experienced reviewers interpreted plaque components using 2D-MC MRI as the reference standard and categorized plaques using a modified American Heart Association lesion classification for MRI. Plaques of American Heart Association type IV and above were classified as advanced. Arteries of American Heart Association types I to II and III were categorized as normal or with early lesions, respectively. One radiologist independently reviewed only 3D-MERGE and labeled the plaques as advanced if they had a wall thickness of >2 mm with high or low signal intensity compared with the adjacent sternocleidomastoid muscle. Sensitivity, specificity, and accuracy for 3D-MERGE were calculated. RESULTS Four hundred forty-nine arteries from 227 participants (mean age 61.2 years old, 64% male) were included in the analysis. Sensitivity, specificity, and accuracy for identification of advanced lesions on 3D-MERGE were 95.0% (95% CI, 91.8-97.2), 86.9% (95% CI, 81.4-92.0), 93.8% (95% CI, 91.1-95.8), respectively. CONCLUSIONS 3D-MERGE can accurately identify advanced carotid atherosclerotic plaques in patients suspected of stroke or transient ischemic attack. It has a more extensive coverage and higher sensitivity and specificity for advanced plaque detection with a much shorter acquisition time than 2D-MC MRI. REGISTRATION URL: https://www.clinicaltrials.gov; Unique identifier: NCT02017756.
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Affiliation(s)
- Duygu Baylam Geleri
- Department of Radiology, University of Washington, Seattle, WA. (D.B.G, B.C., C.Y.)
| | - Hiroko Watase
- Department of Surgery, University of Washington, Seattle, WA. (H.W., T.S.H.)
| | - Baocheng Chu
- Department of Radiology, University of Washington, Seattle, WA. (D.B.G, B.C., C.Y.).,BioMolecular Imaging Center, University of Washington, Seattle, WA. (B.C., C.Y.)
| | - Li Chen
- Department of Electrical and Computer Engineering, University of Washington, Seattle, WA. (L.C.)
| | - Huilin Zhao
- Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University Shanghai, China (H.Z.)
| | - Xihai Zhao
- Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China (X.Z.)
| | - Thomas S Hatsukami
- Department of Surgery, University of Washington, Seattle, WA. (H.W., T.S.H.)
| | - Chun Yuan
- Department of Radiology, University of Washington, Seattle, WA. (D.B.G, B.C., C.Y.).,BioMolecular Imaging Center, University of Washington, Seattle, WA. (B.C., C.Y.)
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Školoudík D, Kešnerová P, Vomáčka J, Hrbáč T, Netuka D, Forostyak S, Roubec M, Herzig R, Belšan T. Shear-Wave Elastography Enables Identification of Unstable Carotid Plaque. ULTRASOUND IN MEDICINE & BIOLOGY 2021; 47:1704-1710. [PMID: 33931284 DOI: 10.1016/j.ultrasmedbio.2021.03.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 03/13/2021] [Accepted: 03/23/2021] [Indexed: 06/12/2023]
Abstract
Shear-wave elastography (SWE) is a novel ultrasound technique for quantifying tissue elasticity. The aim of this study was to identify differences in atherosclerotic plaque elasticity measured using SWE among individuals with symptomatic, asymptomatic progressive and asymptomatic stable carotid plaques. Consecutive patients from the Atherosclerotic Plaque Characteristics Associated with a Progression Rate of the Plaque and a Risk of Stroke in Patients with the Carotid Bifurcation Plaque Study were screened for this research. Neurosonography examination of carotid arteries was performed to identify plaque stenosis of ≥50% using B-mode ultrasound and SWE imaging to measure the mean, maximal and minimal elasticity. The set consisted of 97 participants-74 with asymptomatic stable stenosis, 12 with asymptomatic progressive stenosis and 11 with symptomatic stenosis. The mean elasticity in the asymptomatic stable plaque group was significantly higher than in the asymptomatic progressive (52.2 vs. 30.4 kPa; p < 0.001) and symptomatic (52.2 vs. 36.4 kPa; p = 0.033) plaque groups. No significant differences were found between asymptomatic progressive and symptomatic (p > 0.1) plaque groups. Asymptomatic stable, asymptomatic progressive and symptomatic plaques did not differ in echogenicity, calcifications, homogeneity, occurrence of ulcerated surface, or intra-plaque hemorrhage (p > 0.05 in all cases). SWE was a helpful modality for differentiating between stable and unstable atherosclerotic plaques in carotid arteries.
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Affiliation(s)
- David Školoudík
- Center for Health Research, Ostrava University Medical Faculty, Ostrava, Czech Republic; Stroke Center, Vítkovice Hospital, Ostrava, Czech Republic; Comprehensive Stroke Center, Department of Neurosurgery, University Hospital Ostrava, Ostrava, Czech Republic; Faculty of Health Sciences, Palacký University Olomouc, Olomouc, Czech Republic.
| | - Petra Kešnerová
- Comprehensive Stroke Center, 2(nd) Medical Faculty, Charles University Prague and University Hospital Motol, Prague, Czech Republic
| | - Jaroslav Vomáčka
- Faculty of Health Sciences, Palacký University Olomouc, Olomouc, Czech Republic
| | - Tomáš Hrbáč
- Comprehensive Stroke Center, Department of Neurosurgery, University Hospital Ostrava, Ostrava, Czech Republic
| | - David Netuka
- Comprehensive Stroke Center, Department of Neurosurgery, Military Teaching Hospital Prague, Prague, Czech Republic
| | | | - Martin Roubec
- Comprehensive Stroke Center, Department of Neurology, University Hospital Ostrava, Ostrava, Czech Republic
| | - Roman Herzig
- Department of Neurology, Comprehensive Stroke Center, Charles University Faculty of Medicine and University Hospital Hradec Králové, Hradec Králové, Czech Republic
| | - Tomáš Belšan
- Comprehensive Stroke Center, Department of Radiology, Military Teaching Hospital Prague, Prague, Czech Republic
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Fu Q, Wang X, Wu T, Wang R, Wu X, Wang Y, Feng Z. Carotid atherosclerosis biomarkers in cardiovascular diseases prevention: A systematic review and bibliometric analysis. Eur J Radiol 2020; 129:109133. [PMID: 32610187 DOI: 10.1016/j.ejrad.2020.109133] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 02/09/2020] [Accepted: 06/12/2020] [Indexed: 10/24/2022]
Abstract
PURPOSE While carotid atherosclerosis (CA) biomarkers are valuable surrogates for cardiovascular events, their inadequate utility is highlighted by clinical practice. We performed an interdisciplinary systematic review and bibliometric analysis to identify the knowledge gaps and offer directions for future research. METHODS We applied a comprehensive search strategy to construct a representative dataset of the bibliographic records of CA from 1997 to 2018. A total of 31,793 retrieved articles and 407,473 cited references were included in the analysis. The co-word network and co-citation network were derived to describe the major disciplines and topics of CA research. Milestones detected by burst analysis were reviewed to delineate the evolutionary patterns and emerging trends of research on CA biomarkers. RESULTS CA is a multidisciplinary field of study which could be divided into 3 communities: the primary prevention of CVD, the secondary prevention of CVD and imaging techniques to characterize carotid atherosclerosis. The evolution of a CA biomarker may go through 3 stages: the conceptualization stage, the validation stage and the reclassification stage. Measurements that include different CA plaque features, rather than separately, have shown greater value for cardiovascular risk or clinical decision-making. CONCLUSIONS Although wide variability exists in the evolutionary stages of CA biomarkers, combined evaluation of CA plaque imaging features shows potential value to improve risk prediction and clinical decision-making for CVD prevention.
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Affiliation(s)
- Qian Fu
- School of Medicine and Health Management, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan 430030, China
| | - Xiaojun Wang
- School of Medicine and Health Management, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan 430030, China
| | - Tailai Wu
- School of Medicine and Health Management, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan 430030, China
| | - Ruoxi Wang
- School of Medicine and Health Management, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan 430030, China
| | - Xiang Wu
- School of Medicine and Health Management, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan 430030, China
| | - Yang Wang
- School of Medicine and Health Management, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan 430030, China
| | - Zhanchun Feng
- School of Medicine and Health Management, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan 430030, China.
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Murata K, Murata N, Chu B, Watase H, Hippe DS, Balu N, Sun J, Zhao X, Hatsukami TS, Yuan C. Characterization of Carotid Atherosclerotic Plaques Using 3-Dimensional MERGE Magnetic Resonance Imaging and Correlation With Stroke Risk Factors. Stroke 2020; 51:475-480. [PMID: 31902332 DOI: 10.1161/strokeaha.119.027779] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background and Purpose- High-resolution magnetic resonance imaging is capable of characterizing carotid atherosclerotic plaque morphology and composition. Most reported carotid plaque imaging techniques are 2-dimensional (2D) based with limited longitudinal coverage of ≈30 mm, which may be insufficient for complete visualization of extracranial carotid atheroma. A 3D black-blood imaging technique, motion-sensitized driven equilibrium prepared rapid gradient echo technique (3D-MERGE) can provide larger coverage. We sought to use 3D-MERGE to investigate carotid atherosclerosis plaque distribution and to analyze their correlation with clinical information and stroke risk factors. Methods- From 5 hospitals in China, 97 subjects suspected of recent stroke or transient ischemic attack were imaged with 3D-MERGE within 2 weeks of symptoms using 3T magnetic resonance imaging. Images were analyzed by 2 reviewers. Plaque length was calculated and categorized as plaques within, partially outside, or completely outside of typical 2D magnetic resonance imaging coverage. Associations between plaque features and clinical information, stroke risk factors were assessed. Results- Ninety-seven subjects with 194 carotid arteries (70 men and 27 women, mean age 60 years) were analyzed. Of the 136 plaques identified, 68 (50%) were within, 46 (33.8%) were partially outside, and 22 (16.2%) were completely outside of 2D magnetic resonance imaging coverage. Total plaque length was significantly positively associated with male sex (P<0.001), hypertension (P=0.011), and history of smoking (P<0.001). Hypertensive subjects were more likely to have at least one plaque completely outside the 2D magnetic resonance imaging coverage than nonhypertensive subjects (P=0.007). Conclusions- The 3D-MERGE allows for the identification of substantially more carotid plaques than 2D black-blood techniques. The extent and distribution of plaque, identified by the larger coverage afforded by 3D-MERGE, were found to correlate significantly with male sex and risk factors that are common among patients with stroke, including hypertension and history of cigarette smoking.
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Affiliation(s)
- Kiyoko Murata
- From the Department of Radiology (K.M., N.M., B.C., D.S.H., N.B., J.S., C.Y.), University of Washington, Seattle.,Department of Neurology, Toho University Omori Medical center, Tokyo, Japan (K.M.)
| | - Nozomu Murata
- From the Department of Radiology (K.M., N.M., B.C., D.S.H., N.B., J.S., C.Y.), University of Washington, Seattle.,Department of Radiology, Toho University Ohashi Medical Center, Tokyo, Japan (N.M.)
| | - Baocheng Chu
- From the Department of Radiology (K.M., N.M., B.C., D.S.H., N.B., J.S., C.Y.), University of Washington, Seattle
| | - Hiroko Watase
- Department of Surgery (H.W., T.S.H.), University of Washington, Seattle
| | - Daniel S Hippe
- From the Department of Radiology (K.M., N.M., B.C., D.S.H., N.B., J.S., C.Y.), University of Washington, Seattle
| | - Niranjan Balu
- From the Department of Radiology (K.M., N.M., B.C., D.S.H., N.B., J.S., C.Y.), University of Washington, Seattle
| | - Jie Sun
- From the Department of Radiology (K.M., N.M., B.C., D.S.H., N.B., J.S., C.Y.), University of Washington, Seattle
| | - Xihai Zhao
- Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China (X.Z.)
| | | | - Chun Yuan
- From the Department of Radiology (K.M., N.M., B.C., D.S.H., N.B., J.S., C.Y.), University of Washington, Seattle
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Di Leo N, Venturini L, de Soccio V, Forte V, Lucchetti P, Cerone G, Alagna G, Caratozzolo M, Messineo D, Di Gioia C, Di Marzo L, Fresilli D, De Vito C, Pugliese G, Cantisani V, D'Ambrosio F. Multiparametric ultrasound evaluation with CEUS and shear wave elastography for carotid plaque risk stratification. J Ultrasound 2018; 21:293-300. [PMID: 30378007 PMCID: PMC6237715 DOI: 10.1007/s40477-018-0320-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 09/10/2018] [Indexed: 12/17/2022] Open
Abstract
PURPOSE To assess the diagnostic effectiveness of Multiparametric ultrasound (MPUS), which includes color Doppler ultrasound (CDUS), CEUS and Shear wave elastography (SWE), for evaluating carotid plaque as compared with CT-angiography (CTA) and histology. MATERIALS AND METHODS Forty-three consecutive patients scheduled to undergo carotid endarterectomy underwent MPUS. Then, after periods ranging from 2 days to 2 weeks, all underwent CTA. Each plaque was classified by means of dedicated scores for CEUS and SWE as compared with CTA features. At surgery, each plaque was removed in a single fragment to facilitate histological analysis, which evaluated 4 features: extension of the lipid core, thickness of the fibrous cap, inflammatory infiltrate (CD68 + and CD3 + markers) and the presence of intraplaque microvessels. For the CEUS, SWE and CTA, the following values for identifying plaque vulnerability were evaluated: sensitivity, specificity, accuracy, negative predictive value (NPV), positive predictive value (PPV) and Area under the curve (AUC). Cohen's kappa was used to evaluate the concordance between measurements in the different imaging methods. A p < 0.05 was considered statistically significant. RESULTS At histology, 31 out of 43 plaques were identified as vulnerable because of the presence of at least one of the following criteria: fibrous cap < 200 μm, lipid core, intraplaque hemorrhage, inflammatory infiltrate or intraplaque neovascularization. CTA showed a sensitivity of 87.1%, a specificity of 100%, a PPV of 100%, an NPV of 75% and an AUC of 93.5%. SWE showed a sensitivity of 87.1%, a specificity of 66.7%, a PPV of 87.1%, an NPV of 66.7% and an AUC of 76.9%. CEUS showed a sensitivity of 87.1%, a specificity of 58.3%, a PPV of 84.4%, an NPV of 63.6% and an AUC of 72.7%. CONCLUSIONS Multiparametric ultrasound is an effective modality to obtain comprehensive information on carotid plaques. Further studies are needed to determine whether it can be considered a diagnostic standard.
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Affiliation(s)
- N Di Leo
- Dipartimento di Scienze Radiologiche, Oncologiche e Anatomopatologiche, Policlinico Umberto I Roma, Viale del Policlinico 155, 00161, Rome, RM, Italy.
| | - L Venturini
- Department of Surgery "Pietro Valdoni", Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - V de Soccio
- Dipartimento di Scienze Radiologiche, Oncologiche e Anatomopatologiche, Policlinico Umberto I Roma, Viale del Policlinico 155, 00161, Rome, RM, Italy
| | - V Forte
- Dipartimento di Scienze Radiologiche, Oncologiche e Anatomopatologiche, Policlinico Umberto I Roma, Viale del Policlinico 155, 00161, Rome, RM, Italy
| | - P Lucchetti
- Department of Public Health and Infectious Diseases, Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - G Cerone
- Biomedicine and Prevention Department, University Tor Vergata of Rome, Rome, Italy
| | - G Alagna
- Dipartimento di Scienze Radiologiche, Oncologiche e Anatomopatologiche, Policlinico Umberto I Roma, Viale del Policlinico 155, 00161, Rome, RM, Italy
| | - M Caratozzolo
- Dipartimento di Scienze Radiologiche, Oncologiche e Anatomopatologiche, Policlinico Umberto I Roma, Viale del Policlinico 155, 00161, Rome, RM, Italy
| | - D Messineo
- Dipartimento di Scienze Radiologiche, Oncologiche e Anatomopatologiche, Policlinico Umberto I Roma, Viale del Policlinico 155, 00161, Rome, RM, Italy
| | - C Di Gioia
- Dipartimento di Scienze Radiologiche, Oncologiche e Anatomopatologiche, Policlinico Umberto I Roma, Viale del Policlinico 155, 00161, Rome, RM, Italy
| | - L Di Marzo
- Department of Surgery "Pietro Valdoni", Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - D Fresilli
- Dipartimento di Scienze Radiologiche, Oncologiche e Anatomopatologiche, Policlinico Umberto I Roma, Viale del Policlinico 155, 00161, Rome, RM, Italy
| | - C De Vito
- Department of Public Health and Infectious Diseases, Policlinico Umberto I, Sapienza University of Rome, Rome, Italy
| | - G Pugliese
- Dipartimento di Scienze Radiologiche, Oncologiche e Anatomopatologiche, Policlinico Umberto I Roma, Viale del Policlinico 155, 00161, Rome, RM, Italy
| | - V Cantisani
- Dipartimento di Scienze Radiologiche, Oncologiche e Anatomopatologiche, Policlinico Umberto I Roma, Viale del Policlinico 155, 00161, Rome, RM, Italy
| | - F D'Ambrosio
- Dipartimento di Scienze Radiologiche, Oncologiche e Anatomopatologiche, Policlinico Umberto I Roma, Viale del Policlinico 155, 00161, Rome, RM, Italy
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3-Dimensional Ultrasound in Carotid Stenosis Quantitation and Beyond. JACC Cardiovasc Imaging 2018; 11:397-399. [DOI: 10.1016/j.jcmg.2017.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 03/09/2017] [Indexed: 11/20/2022]
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Davis LA, Stewart SE, Carsten CG, Snyder BA, Sutton MA, Lessner SM. Characterization of fracture behavior of human atherosclerotic fibrous caps using a miniature single edge notched tensile test. Acta Biomater 2016; 43:101-111. [PMID: 27431877 DOI: 10.1016/j.actbio.2016.07.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 07/05/2016] [Accepted: 07/14/2016] [Indexed: 01/13/2023]
Abstract
UNLABELLED One well-established cause of ischemic stroke is atherosclerotic plaque rupture in the carotid artery. Rupture occurs when a tear in the fibrous cap exposes highly thrombogenic material in the lipid core. Though some fibrous cap material properties have been measured, such as ultimate tensile strength and stress-strain responses, there has been very little, if any, data published regarding the fracture behavior of atherosclerotic fibrous caps. This study aims to characterize the qualitative and quantitative fracture behavior of human atherosclerotic plaque tissue obtained from carotid endarterectomy samples using two different metrics. Uniaxial tensile experiments along with miniature single edge notched tensile (MSENT) experiments were performed on strips of isolated fibrous cap. Crack tip opening displacement (CTOD) and stress in the un-cracked segment (UCS) were measured at failure in fibrous cap MSENT specimens subjected to uniaxial tensile loading. Both CTOD and the degree of crack blunting, measured as the radius of curvature of the crack tip, increased as tearing propagated through the tissue. Higher initial stress in the UCS is significantly correlated with higher collagen content and lower macrophage content in the fibrous cap (ρ=0.77, P=0.009; ρ=-0.64, P=0.047; respectively). Trends in the data show that higher CTOD is inversely related to collagen content, though the sample size in this study is insufficient to statistically substantiate this relationship. To the authors' knowledge, this is the pioneering study examining the fracture behavior of fibrous caps and the first use of the CTOD metric in vascular tissue. STATEMENT OF SIGNIFICANCE A tear in the fibrous cap of atherosclerotic plaque can lead to ischemic stroke or myocardial infarction. While there is some information in the literature regarding quantitative measures of fibrous cap failure, there is little information regarding the behavior of the tissue during failure. This study examines the failure behavior of fibrous caps both qualitatively, by examining how and where the tissue fails, and quantitatively, by measuring (a) crack tip opening displacement (CTOD) in vascular tissue for the first time and (b) uniaxial stress in the un-cracked segment (UCS). This study shows that both metrics should be evaluated when assessing plaque vulnerability.
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Affiliation(s)
- Lindsey A Davis
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208 USA; Department of Cell Biology and Anatomy, University of South Carolina, School of Medicine, 6439 Garners Ferry Road, Columbia, SC 29209 USA
| | - Samantha E Stewart
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208 USA; Department of Cell Biology and Anatomy, University of South Carolina, School of Medicine, 6439 Garners Ferry Road, Columbia, SC 29209 USA
| | - Christopher G Carsten
- Division of Vascular Surgery, Greenville Health System, 701 Grove Road, Greenville, SC 29605 USA
| | - Bruce A Snyder
- Division of Vascular Surgery, Greenville Health System, 701 Grove Road, Greenville, SC 29605 USA
| | - Michael A Sutton
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208 USA; Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208 USA
| | - Susan M Lessner
- Biomedical Engineering Program, University of South Carolina, Columbia, SC 29208 USA; Department of Cell Biology and Anatomy, University of South Carolina, School of Medicine, 6439 Garners Ferry Road, Columbia, SC 29209 USA.
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