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Hou S, Zhan Z, Fan J, Li M, Chen S, Zhang Y, Long Y, Pan W, Zhang X, Zhou D, Ge J. Association of in situ thrombus within the patent foramen ovale and patients with migraine: A prospective cohort study. Heliyon 2024; 10:e32105. [PMID: 38882380 PMCID: PMC11176847 DOI: 10.1016/j.heliyon.2024.e32105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 05/16/2024] [Accepted: 05/28/2024] [Indexed: 06/18/2024] Open
Abstract
Background Patent foramen ovale (PFO) is associated with migraine; however, the mechanism of PFO-associated migraine is not well known; additionally, percutaneous closure is controversial. This study aimed to investigate in situ thrombi within the PFO and explore the possible predictors of the effectiveness of PFO closure in migraineurs. Methods This prospective cohort study included 48 asymptomatic patients and 92 migraineurs with PFO. Optical coherence tomography (OCT) was used to evaluate the PFO microstructure. Only migraineurs underwent percutaneous closure. Migraineurs were divided into two cohorts based on the presence of a thrombus within the PFO. The symptoms were assessed at the 12-month follow-up visit. Predictors were evaluated employing multivariate logistic regression and receiver operating characteristic curve analyses. Results In situ thrombi within PFO were identified in 69 migraineurs and in two asymptomatic patients (76.7 % vs. 4.3 %; P < 0.001). Additionally, endocardial irregularity, discontinuity, low signal, and spasm were found in 59 (65.6 %), 15 (16.7 %), 13 (14.4 %), and six (6.7 %) patients, respectively, in the migraine group. In situ thrombus was associated with migraine risk (OR 49.03; 95%CI 8.52-282.18; P < 0.001). At the 12-month follow-up of the migraineur cohort, the primary endpoint, a 50 % reduction in migraine frequency after closure (with or without thrombus in PFO) was met (85.3 % vs. 25.0 %; P < 0.001). In situ thrombus was associated with migraine relief (OR 6.75; 95%CI 1.28-35.56; P = 0.024). Conclusions In situ thrombus and abnormal endocardium within PFOs were common in migraineurs, and in situ thrombus was a risk factor for migraine. Percutaneous closure was more effective in migraineurs with thrombi within the PFO. OCT imaging improved the understanding of pathogenic PFOs and may be helpful in selecting suitable migraineurs for PFO closure.
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Affiliation(s)
- Shiqiang Hou
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Zhi Zhan
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Jianing Fan
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Mingfei Li
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Shasha Chen
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Yuan Zhang
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Yuliang Long
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Wenzhi Pan
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Xiaochun Zhang
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Daxin Zhou
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
| | - Junbo Ge
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
- National Clinical Research Center for Interventional Medicine, Shanghai, China
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2
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Kuyanova J, Dubovoi A, Fomichev A, Khelimskii D, Parshin D. Hemodynamics of vascular shunts: trends, challenges, and prospects. Biophys Rev 2023; 15:1287-1301. [PMID: 37975016 PMCID: PMC10643646 DOI: 10.1007/s12551-023-01149-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 09/12/2023] [Indexed: 11/19/2023] Open
Abstract
Vascular bypass surgery takes a significant place in the treatment of vascular disease. According to various assessments, this type of surgery is associated with almost 20 % of all vascular surgery episodes (up to 23 % according to the Federal Neurosurgical Center of Novosibirsk). Even though the problem of using of vascular grafts is obvious and natural, many problems associated with them are not still elucidated. From the mechanics' point of view, a vascular bypass is a converging or diverging tee, and the functioning of such structures still does not have strict mathematical formulations and proofs in the general case, which forces many researchers to solve specific engineering problems associated with shunting. Mathematical modeling, which is the gold standard for virtual simulations of industrial and medical problems, faces great difficulties and limitations in solving problems for vascular bypasses. Complications in the treatment of the vascular disease may follow the difficulties in mathematical modeling, and the price can be a cardiac arrest or a stroke. This work is devoted to the main aspects of the medical application of vascular bypasses and their functioning as a mechanical system, as well the mathematical aspects of their possible setup.
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Affiliation(s)
- Julia Kuyanova
- Department, Lavrentyev Institute of Hydrodynamics SB RAS, Ac. Lavrentieva ave., Novosibirsk, 630090 Russian Federation
| | - Andrei Dubovoi
- Department, FSBI “Federal Neurosurgical Center”, Nemirovicha-Danchenko st., Novosibirsk, 630087 Russian Federation
| | - Aleksei Fomichev
- Department, Meshalkin National Medical Research Center, Rechkunovskaya st., Novosibirsk, 610101 Russian Federation
| | - Dmitrii Khelimskii
- Department, Meshalkin National Medical Research Center, Rechkunovskaya st., Novosibirsk, 610101 Russian Federation
| | - Daniil Parshin
- Department, Lavrentyev Institute of Hydrodynamics SB RAS, Ac. Lavrentieva ave., Novosibirsk, 630090 Russian Federation
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Kim HO, Jiang B, Poon EK, Thondapu V, Kim CJ, Kurihara O, Araki M, Nakajima A, Mamon C, Dijkstra J, Lee H, Ooi A, Barlis P, Jang IK. High endothelial shear stress and stress gradient at plaque erosion persist up to 12 months. Int J Cardiol 2022; 357:1-7. [DOI: 10.1016/j.ijcard.2022.03.035] [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: 01/22/2022] [Revised: 03/08/2022] [Accepted: 03/14/2022] [Indexed: 11/29/2022]
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4
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Luo X, Lv Y, Bai X, Qi J, Weng X, Liu S, Bao X, Jia H, Yu B. Plaque Erosion: A Distinctive Pathological Mechanism of Acute Coronary Syndrome. Front Cardiovasc Med 2021; 8:711453. [PMID: 34651023 PMCID: PMC8505887 DOI: 10.3389/fcvm.2021.711453] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 08/30/2021] [Indexed: 11/13/2022] Open
Abstract
Plaque erosion (PE) is one of the most important pathological mechanisms underlying acute coronary syndrome (ACS). The incidence of PE is being increasingly recognized owing to the development and popularization of intracavitary imaging. Unlike traditional vulnerable plaques, eroded plaques have unique pathological characteristics. Moreover, recent studies have revealed that there are differences in the physiopathological mechanisms, biomarkers, and clinical outcomes between PE and plaque rupture (PR). Accurate diagnosis and treatment of eroded plaques require an understanding of the pathogenesis of PE. In this review, we summarize recent scientific discoveries of the pathological characteristics, mechanisms, biomarkers, clinical strategies, and prognosis in patients with PE.
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Affiliation(s)
- Xing Luo
- Department of Cardiology, 2nd Affiliated Hospital of Harbin Medical University, Harbin, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, China
| | - Ying Lv
- Department of Cardiology, 2nd Affiliated Hospital of Harbin Medical University, Harbin, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, China
| | - Xiaoxuan Bai
- Department of Cardiology, 2nd Affiliated Hospital of Harbin Medical University, Harbin, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, China
| | - Jinyu Qi
- Department of Cardiology, 2nd Affiliated Hospital of Harbin Medical University, Harbin, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, China
| | - Xiuzhu Weng
- Department of Cardiology, 2nd Affiliated Hospital of Harbin Medical University, Harbin, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, China
| | - Shaoyu Liu
- Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, China.,Bin Xian People's Hospital, Harbin, China
| | - Xiaoyi Bao
- Department of Cardiology, 2nd Affiliated Hospital of Harbin Medical University, Harbin, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, China
| | - Haibo Jia
- Department of Cardiology, 2nd Affiliated Hospital of Harbin Medical University, Harbin, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, China
| | - Bo Yu
- Department of Cardiology, 2nd Affiliated Hospital of Harbin Medical University, Harbin, China.,Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, China
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Vardhan M, Randles A. Application of physics-based flow models in cardiovascular medicine: Current practices and challenges. BIOPHYSICS REVIEWS 2021; 2:011302. [PMID: 38505399 PMCID: PMC10903374 DOI: 10.1063/5.0040315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 02/18/2021] [Indexed: 03/21/2024]
Abstract
Personalized physics-based flow models are becoming increasingly important in cardiovascular medicine. They are a powerful complement to traditional methods of clinical decision-making and offer a wealth of physiological information beyond conventional anatomic viewing using medical imaging data. These models have been used to identify key hemodynamic biomarkers, such as pressure gradient and wall shear stress, which are associated with determining the functional severity of cardiovascular diseases. Importantly, simulation-driven diagnostics can help researchers understand the complex interplay between geometric and fluid dynamic parameters, which can ultimately improve patient outcomes and treatment planning. The possibility to compute and predict diagnostic variables and hemodynamics biomarkers can therefore play a pivotal role in reducing adverse treatment outcomes and accelerate development of novel strategies for cardiovascular disease management.
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Affiliation(s)
- M. Vardhan
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, USA
| | - A. Randles
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, USA
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6
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Grégory Franck. Role of mechanical stress and neutrophils in the pathogenesis of plaque erosion. Atherosclerosis 2020; 318:60-69. [PMID: 33190807 DOI: 10.1016/j.atherosclerosis.2020.11.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/05/2020] [Accepted: 11/03/2020] [Indexed: 02/05/2023]
Abstract
Mechanical stress is a well-recognized driver of plaque rupture. Likewise, investigating the role of mechanical forces in plaque erosion has recently begun to provide some important insights, yet the knowledge is by far less advanced. The most significant example is that of shear stress, which has early been proposed as a possible driver for focal endothelial death and denudation. Recent findings using optical coherence tomography, computational sciences and mechanical models show that plaque erosion occurs most likely around atheromatous plaque throats with specific stress pattern. In parallel, we have recently shown that neutrophil-dependent inflammation promotes plaque erosion, possibly through a noxious action on ECs. Most importantly, spontaneous thrombosis - associated or not with EC denudation - can be impacted by hemodynamics, and it is now established that neutrophils promote thrombosis and platelet activation, highlighting a potential relationship between, mechanical stress, inflammation, and EC loss in the setting of coronary plaque erosion. Here, we review our current knowledge regarding the implication of both mechanical stress and neutrophils, and we discuss their implication in the promotion of plaque erosion via EC loss and thrombosis.
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Affiliation(s)
- Grégory Franck
- Inserm LVTS U1148. CHU Bichat, 46 Rue Henri Huchard, 75018, Paris, France.
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7
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Sharzehee M, Chang Y, Song JP, Han HC. Hemodynamic effects of myocardial bridging in patients with hypertrophic cardiomyopathy. Am J Physiol Heart Circ Physiol 2019; 317:H1282-H1291. [PMID: 31674812 DOI: 10.1152/ajpheart.00466.2019] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Myocardial bridging (MB) is linked to angina and myocardial ischemia and may lead to sudden cardiac death in patients with hypertrophic cardiomyopathy (HCM). However, it remains unclear how MB affect the coronary blood flow in HCM patients. The aim of this study was to assess the effects of MB on coronary hemodynamics in HCM patients. Fifteen patients with MB (7 HCM and 8 non-HCM controls) in their left anterior descending (LAD) coronary artery were chosen. Transient computational fluid dynamics (CFD) simulations were conducted in anatomically realistic models of diseased (with MB) and virtually healthy (without MB) LAD from these patients, reconstructed from biplane angiograms. Our CFD simulation results demonstrated that dynamic compression of MB led to diastolic flow disturbances and could significantly reduce the coronary flow in HCM patients as compared with non-HCM group (P < 0.01). The pressure drop coefficient was remarkably higher (P < 0.05) in HCM patients. The flow rate change is strongly correlated with both upstream Reynolds number and MB compression ratio, while the MB length has less impact on coronary flow. The hemodynamic results and clinical outcomes revealed that HCM patients with an MB compression ratio higher than 65% required a surgical intervention. In conclusion, the transient MB compression can significantly alter the diastolic flow pattern and wall shear stress distribution in HCM patients. HCM patients with severe MB may need a surgical intervention.NEW & NOTEWORTHY In this study, the hemodynamic significance of myocardial bridging (MB) in patients with hypertrophic cardiomyopathy (HCM) was investigated to provide valuable information for surgical decision-making. Our results illustrated that the transient MB compression led to complex flow patterns, which can significantly alter the diastolic flow and wall shear stress distribution. The hemodynamic results and clinical outcomes demonstrated that patients with HCM and an MB compression ratio higher than 65% required a surgical intervention.
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Affiliation(s)
- Mohammadali Sharzehee
- Department of Mechanical Engineering, The University of Texas at San Antonio, San Antonio, Texas
| | - Yuan Chang
- Department of Cardiac Surgery, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Beijing, China
| | - Jiang-Ping Song
- Department of Cardiac Surgery, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Beijing, China
| | - Hai-Chao Han
- Department of Mechanical Engineering, The University of Texas at San Antonio, San Antonio, Texas
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8
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Liu R, Zhang Y, Zheng Y, Liu Y, Zhao Y, Yi L. Automated Detection of Vulnerable Plaque for Intravascular Optical Coherence Tomography Images. Cardiovasc Eng Technol 2019; 10:590-603. [DOI: 10.1007/s13239-019-00425-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 07/04/2019] [Indexed: 10/26/2022]
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9
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10
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Cai W, Chen L, Zhang L, Tu S, Fan L, Chen Z, Luo Y, Zheng X. Branch ostial optimization treatment and optimized provisional t-stenting with polymeric bioresorbable scaffolds: Ex-vivo morphologic and hemodynamic examination. Medicine (Baltimore) 2018; 97:e12972. [PMID: 30412122 PMCID: PMC6221742 DOI: 10.1097/md.0000000000012972] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The optimal side-branch (SB) ostium treatment after provisional side-branch scaffolding remains a subject of debate in bioresorbable vascular scaffold (BVS) era. In this study, we evaluated a novel optimized provisional T-stenting technique (OPT) and assessed its feasibility by comparison with T and small protrusion technique (TAP).Two provisional SB scaffolding techniques (OPT, n = 5; TAP, n = 5) were performed using polymeric BVS in a bifurcated phantom. The sequential intermediate snuggling balloon dilation, also called ostial optimal technique, was added to OPT but not TAP to dilate the side-branch ostium while the final snuggling balloon dilation applied for both procedures. Microcomputed tomography (microCT) and optical coherence tomography (OCT) were performed to assess morphology, and computational fluid dynamics (CFD) was performed to assess hemodynamics in the scaffolded bifurcations. Compared with TAP in microCT analysis, OPT created shorter neo-carina length than TAP (0.34 ± 0.10 mm vs 1.02 ± 0.26 mm, P < .01), longer valgus struts length (2.49 ± 0.27 mm vs 1.78 ± 0.33 mm, P < .01) with larger MB ostial area (9.46 ± 0.04 mm vs 8.34 ± 0.09 mm, P < .01). OCT found that OPT significantly decreased the struts mal-apposition (13.20 ± 0.16% vs 1.94 ± 0.54%, P < .01). CFD revealed that OPT generated more favorable flow pattern than TAP, as indicated by less percent (4.68 ± 1.40% vs 8.88 ± 1.21%, P < .01) of low wall shear stress (<0.4 Pa) along the lateral walls.By using BVSs for bifurcation intervention, the sequential intermediate snuggling balloon dilation is feasible for optimizing ostial SB and facilitating subsequent SB scaffolding. Results show OPT is better than TAP for bifurcated morphology and hemodynamics in this ex-vivo study.
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Affiliation(s)
- Wei Cai
- Department of Cardiology, Fujian Medical University Union Hospital
- Provincial Institute of Coronary Artery Disease, Fujian, PR of China
| | - Lianglong Chen
- Department of Cardiology, Fujian Medical University Union Hospital
- Provincial Institute of Coronary Artery Disease, Fujian, PR of China
| | - Linlin Zhang
- Department of Cardiology, Fujian Medical University Union Hospital
- Provincial Institute of Coronary Artery Disease, Fujian, PR of China
| | - Sheng Tu
- Department of Cardiology, Fujian Medical University Union Hospital
- Provincial Institute of Coronary Artery Disease, Fujian, PR of China
| | - Lin Fan
- Department of Cardiology, Fujian Medical University Union Hospital
- Provincial Institute of Coronary Artery Disease, Fujian, PR of China
| | - Zhaoyang Chen
- Department of Cardiology, Fujian Medical University Union Hospital
- Provincial Institute of Coronary Artery Disease, Fujian, PR of China
| | - Yukun Luo
- Department of Cardiology, Fujian Medical University Union Hospital
- Provincial Institute of Coronary Artery Disease, Fujian, PR of China
| | - Xingchun Zheng
- Department of Cardiology, Fujian Medical University Union Hospital
- Provincial Institute of Coronary Artery Disease, Fujian, PR of China
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11
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Eshtehardi P, Brown AJ, Bhargava A, Costopoulos C, Hung OY, Corban MT, Hosseini H, Gogas BD, Giddens DP, Samady H. High wall shear stress and high-risk plaque: an emerging concept. Int J Cardiovasc Imaging 2017; 33:1089-1099. [PMID: 28074425 DOI: 10.1007/s10554-016-1055-1] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 12/26/2016] [Indexed: 12/30/2022]
Abstract
In recent years, there has been a significant effort to identify high-risk plaques in vivo prior to acute events. While number of imaging modalities have been developed to identify morphologic characteristics of high-risk plaques, prospective natural-history observational studies suggest that vulnerability is not solely dependent on plaque morphology and likely involves additional contributing mechanisms. High wall shear stress (WSS) has recently been proposed as one possible causative factor, promoting the development of high-risk plaques. High WSS has been shown to induce specific changes in endothelial cell behavior, exacerbating inflammation and stimulating progression of the atherosclerotic lipid core. In line with experimental and autopsy studies, several human studies have shown associations between high WSS and known morphological features of high-risk plaques. However, despite increasing evidence, there is still no longitudinal data linking high WSS to clinical events. As the interplay between atherosclerotic plaque, artery, and WSS is highly dynamic, large natural history studies of atherosclerosis that include WSS measurements are now warranted. This review will summarize the available clinical evidence on high WSS as a possible etiological mechanism underlying high-risk plaque development.
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Affiliation(s)
- Parham Eshtehardi
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, 1364 Clifton Road F622, Atlanta, GA, 30322, USA
| | - Adam J Brown
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
| | - Ankit Bhargava
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, 1364 Clifton Road F622, Atlanta, GA, 30322, USA
| | - Charis Costopoulos
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
| | - Olivia Y Hung
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, 1364 Clifton Road F622, Atlanta, GA, 30322, USA
| | - Michel T Corban
- Department of Cardiology, Mayo Clinic School of Medicine, Rochester, MN, USA
| | - Hossein Hosseini
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, 1364 Clifton Road F622, Atlanta, GA, 30322, USA
| | - Bill D Gogas
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, 1364 Clifton Road F622, Atlanta, GA, 30322, USA
| | - Don P Giddens
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, USA
| | - Habib Samady
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, 1364 Clifton Road F622, Atlanta, GA, 30322, USA.
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12
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A head-to-head comparison between CT- and IVUS-derived coronary blood flow models. J Biomech 2016; 51:65-76. [PMID: 27939753 DOI: 10.1016/j.jbiomech.2016.11.070] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 11/29/2016] [Accepted: 11/29/2016] [Indexed: 01/05/2023]
Abstract
The goal of this work is to compare coronary hemodynamics as predicted by computational blood flow models derived from two imaging modalities: coronary computed tomography angiography (CCTA) and intravascular ultrasound integrated with angiography (IVUS). Criteria to define boundary conditions are proposed to overcome the dissimilar anatomical definition delivered by both modalities. The strategy to define boundary conditions is novel in the present context, and naturally accounts for the flow redistribution induced by the resistance of coronary vessels. Hyperemic conditions are assumed to assess model predictions under stressed hemodynamic environments similar to those encountered in Fractional Flow Reserve (FFR) calculations. As results, it was found that CCTA models predict larger pressure drops, higher average blood velocity and smaller FFR. Concerning the flow rate at distal locations in the major vessels of interest, it was found that CCTA predicted smaller flow than IVUS, which is a consequence of a larger sensitivity of CCTA models to coronary steal phenomena. Comparisons to in-vivo measurements of FFR are shown.
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13
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White SJ, Newby AC, Johnson TW. Endothelial erosion of plaques as a substrate for coronary thrombosis. Thromb Haemost 2016; 115:509-19. [PMID: 26791872 DOI: 10.1160/th15-09-0765] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 12/09/2015] [Indexed: 01/28/2023]
Abstract
Myocardial infarction is a prevalent, life-threatening consequence of athero-thrombosis. Post-mortem histology and intravascular imaging in live patients have shown that approximately one third of myocardial infarctions are caused by a thrombus overlying an intact, non-ruptured atherosclerotic plaque. Histology identifies erosion of luminal endothelial cells from smooth muscle and proteoglycan-rich, thick fibrous cap atheromas as the underlying pathology. Unlike plaque ruptures, endothelial erosions tend to occur on thick-capped atherosclerotic plaques and may or may not be associated with inflammation. Smoking and female gender are strong risk factors for erosion. Multiple mechanisms may contribute to endothelial erosion, including endothelial dysfunction, TLR signalling, leukocyte activation and modification of sub-endothelial matrix by endothelial or smooth muscle cells, which may trigger loss of adhesion to the extracellular matrix or endothelial apoptosis. Diagnosis of endothelial erosion by intravascular imaging, especially high resolution optical coherence tomography, may influence treatment strategies, offering prognostic value and utility as an endpoint in trials of agents designed to preserve an intact coronary endothelium.
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Affiliation(s)
- Stephen J White
- Dr Stephen White, University of Bristol, School of Clinical Sciences, Level 7, Queens Building, Bristol Royal Infirmary, Bristol, BS2 8HW, UK, Tel.: +44 117 3423190, E-mail:
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14
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Zheng X, Peng H, Zhao D, Ma Q, Fu K, Chen G, Fan Q, Liu J. Optimal Revascularization Strategy on Medina 0,1,0 Left Main Bifurcation Lesions in Type 2 Diabetes. J Diabetes Res 2016; 2016:1702454. [PMID: 27777957 PMCID: PMC5061990 DOI: 10.1155/2016/1702454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 02/18/2016] [Indexed: 11/18/2022] Open
Abstract
Aim. Diabetes mellitus (DM) is a major risk factor for cardiovascular disease. The implications of a diagnosis of DM are as severe as the diagnosis of coronary artery disease. For many patients with complex coronary artery disease, optimal revascularization strategy selection and optimal medical therapy are equally important. In this study, we compared the hemodynamic results of different stenting techniques for Medina 0,1,0 left main bifurcation lesions. Methods. We use idealized left main bifurcation models and computational fluid dynamics analysis to evaluate hemodynamic parameters which are known to affect the risk of restenosis and thrombosis at stented bifurcation. The surface integrals of time-averaged wall shear stress (TAWSS) and oscillatory shear index (OSI) at bifurcation site were quantified. Results. Crossover stenting without final kissing balloon angioplasty provided the most favorable hemodynamic results (integrated values of TAWSS = 2.96 × 10-4 N, OSI = 4.75 × 10-6 m2) with bifurcation area subjected to OSI values >0.25, >0.35, and >0.45 calculated as 0.39 mm2, 0.06 mm2, and 0 mm2, respectively. Conclusion. Crossover stenting only offers hemodynamic advantages over other stenting techniques for Medina 0,1,0 left main bifurcation lesions and large bifurcation angle is associated with unfavorable flow profiles.
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Affiliation(s)
- Xuwei Zheng
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing 100029, China
| | - Hongyu Peng
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing 100029, China
| | - Donghui Zhao
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing 100029, China
| | - Qin Ma
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing 100029, China
| | - Kun Fu
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing 100029, China
| | - Guo Chen
- Soft Matter and Interdisciplinary Research Center, College of Physics, Chongqing University, Chongqing 401331, China
| | - Qian Fan
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing 100029, China
- *Qian Fan: and
| | - Jinghua Liu
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing 100029, China
- *Jinghua Liu:
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Campbell IC, Suever JD, Timmins LH, Veneziani A, Vito RP, Virmani R, Oshinski JN, Taylor WR. Biomechanics and inflammation in atherosclerotic plaque erosion and plaque rupture: implications for cardiovascular events in women. PLoS One 2014; 9:e111785. [PMID: 25365517 PMCID: PMC4218818 DOI: 10.1371/journal.pone.0111785] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 09/30/2014] [Indexed: 01/25/2023] Open
Abstract
Objective Although plaque erosion causes approximately 40% of all coronary thrombi and disproportionally affects women more than men, its mechanism is not well understood. The role of tissue mechanics in plaque rupture and regulation of mechanosensitive inflammatory proteins is well established, but their role in plaque erosion is unknown. Given obvious differences in morphology between plaque erosion and rupture, we hypothesized that inflammation in general as well as the association between local mechanical strain and inflammation known to exist in plaque rupture may not occur in plaque erosion. Therefore, our objective was to determine if similar mechanisms underlie plaque rupture and plaque erosion. Methods and Results We studied a total of 74 human coronary plaque specimens obtained at autopsy. Using lesion-specific computer modeling of solid mechanics, we calculated the stress and strain distribution for each plaque and determined if there were any relationships with markers of inflammation. Consistent with previous studies, inflammatory markers were positively associated with increasing strain in specimens with rupture and thin-cap fibroatheromas. Conversely, overall staining for inflammatory markers and apoptosis were significantly lower in erosion, and there was no relationship with mechanical strain. Samples with plaque erosion most closely resembled those with the stable phenotype of thick-cap fibroatheromas. Conclusions In contrast to classic plaque rupture, plaque erosion was not associated with markers of inflammation and mechanical strain. These data suggest that plaque erosion is a distinct pathophysiological process with a different etiology and therefore raises the possibility that a different therapeutic approach may be required to prevent plaque erosion.
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Affiliation(s)
- Ian C. Campbell
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, Georgia, United States of America
| | - Jonathan D. Suever
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, Georgia, United States of America
| | - Lucas H. Timmins
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, Georgia, United States of America
- Cardiology Division, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Alessandro Veneziani
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, Georgia, United States of America
- Department of Mathematics and Computer Science, Emory University, Atlanta, Georgia, United States of America
| | - Raymond P. Vito
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, Georgia, United States of America
- George W. Woodruff Department of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Renu Virmani
- CVPath Institute, Inc., Gaithersburg, Maryland, United States of America
| | - John N. Oshinski
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, Georgia, United States of America
- Department of Radiology and Imaging Science, Emory University, Atlanta, Georgia, United States of America
| | - W. Robert Taylor
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, Georgia, United States of America
- Cardiology Division, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, United States of America
- Cardiology Division, Atlanta Veterans Affairs Medical Center, Decatur, Georgia, United States of America
- * E-mail:
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Sameshima N, Yamashita A, Sato S, Matsuda S, Matsuura Y, Asada Y. The values of wall shear stress, turbulence kinetic energy and blood pressure gradient are associated with atherosclerotic plaque erosion in rabbits. J Atheroscler Thromb 2014; 21:831-8. [PMID: 24671111 DOI: 10.5551/jat.23093] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
AIM To clarify the contribution of hemodynamic factors to the onset of plaque erosion in smooth muscle cell (SMC)-rich atherosclerotic plaque. METHODS We developed a rabbit model of SMC-rich atherosclerotic plaque with various degree of stenosis induced by incomplete ligation and generated three-dimensional models of five rabbit femoral arteries based on 130-162 serial histological cross-sections at 100-μm intervals per artery. We performed a computational blood flow simulation using the Reynolds-averaged Navier-Stokes model and calculated the wall shear stress (WSS), turbulence kinetic energy (TKE), blood pressure (BP) and blood pressure gradients (BPG) in eight sections (the inlet, the stenotic portion and areas 1, 2 and 5mm from the stenotic portion) in each rabbit. We also investigated whether the magnitude of WSS or TKE was related to the presence or absence of erosive injury by evaluating six points (the locally highest, median and lowest of WSS or TKE) in each section. RESULTS The magnitudes of WSS, TKE and BPG, but not BP, correlated significantly with the extent of histologically-defined plaque erosion (WSS, r=0.55, p<0.001; TKE, r=0.53, p<0.001; BPG, r=0.61, p<0.0001, n=40). The values for WSS and TKE were significantly larger at sites with, compared to without, erosive injury (n=107 and n=119 points, respectively; both p<0.0001). CONCLUSIONS These results suggest that increased values of WSS, TKE and BPG considerably contribute to the onset of plaque erosion.
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Affiliation(s)
- Naoki Sameshima
- Department of Pathology, Faculty of Medicine, University of Miyazaki
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