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Zheng L, Tian X, Abrigo J, Fang H, Ip BYM, Liu Y, Li S, Liu Y, Lan L, Liu H, Ip HL, Fan FSY, Ma SH, Ma K, Lau AY, Soo YOY, Leung H, Mok VCT, Wong LKS, Xu Y, Liu L, Leng X, Leung TW. Hemodynamic significance of intracranial atherosclerotic disease and ipsilateral imaging markers of cerebral small vessel disease. Eur Stroke J 2024; 9:144-153. [PMID: 37800871 PMCID: PMC10916816 DOI: 10.1177/23969873231205669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 09/19/2023] [Indexed: 10/07/2023] Open
Abstract
INTRODUCTION Cerebral small vessel disease (CSVD) commonly exists in patients with symptomatic intracranial atherosclerotic disease (sICAD). We aimed to investigate the associations of hemodynamic features of sICAD lesions with imaging markers and overall burden of CSVD. PATIENTS AND METHODS Patients with anterior-circulation sICAD (50%-99% stenosis) were analyzed in this cross-sectional study. Hemodynamic features of a sICAD lesion were quantified by translesional pressure ratio (PR = Pressurepost-stenotic/Pressurepre-stenotic) and wall shear stress ratio (WSSR = WSSstenotic-throat/WSSpre-stenotic) via CT angiography-based computational fluid dynamics modeling. PR ⩽median was defined as low ("abnormal") PR, and WSSR ⩾ fourth quartile as high ("abnormal") WSSR. For primary analyses, white matter hyperintensities (WMHs), lacunes, and cortical microinfarcts (CMIs) were assessed in MRI and summed up as overall CSVD burden, respectively in ipsilateral and contralateral hemispheres to sICAD. Enlarged perivascular spaces (EPVSs) and cerebral microbleeds (CMBs) were assessed for secondary analyses. RESULTS Among 112 sICAD patients, there were more severe WMHs, more lacunes and CMIs, and more severe overall CSVD burden ipsilaterally than contralaterally (all p < 0.05). Abnormal PR and WSSR (vs normal PR and WSSR) was significantly associated with moderate-to-severe WMHs (adjusted odds ratio = 10.12, p = 0.018), CMI presence (5.25, p = 0.003), and moderate-to-severe CSVD burden (12.55; p = 0.033), ipsilaterally, respectively independent of contralateral WMHs, CMI(s), and CSVD burden. EPVSs and CMBs were comparable between the two hemispheres, with no association found with the hemodynamic metrics. DISCUSSION AND CONCLUSION There are more severe WMHs and CMI(s) in the hemisphere ipsilateral than contralateral to sICAD. The hemodynamic significance of sICAD lesions was independently associated with severities of WMHs and CMI(s) ipsilaterally.
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Affiliation(s)
- Lina Zheng
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xuan Tian
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Jill Abrigo
- Department of Imaging and Interventional Radiology, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Hui Fang
- Department of Neurology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Bonaventure YM Ip
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yuying Liu
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Shuang Li
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yu Liu
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Linfang Lan
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
- Department of Neurology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Haipeng Liu
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
- Research Centre for Intelligent Healthcare, Faculty of Health and Life Sciences, Coventry University, Coventry, UK
| | - Hing Lung Ip
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Florence SY Fan
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Sze Ho Ma
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Karen Ma
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Alexander Y Lau
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yannie OY Soo
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Howan Leung
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Vincent CT Mok
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Lawrence KS Wong
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yuming Xu
- Department of Neurology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Liping Liu
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xinyi Leng
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Thomas W Leung
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong SAR, China
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Liu Y, Li S, Tian X, Leung TW, Liu L, Liebeskind DS, Leng X. Cerebral haemodynamics in symptomatic intracranial atherosclerotic disease: a narrative review of the assessment methods and clinical implications. Stroke Vasc Neurol 2023; 8:521-530. [PMID: 37094991 PMCID: PMC10800270 DOI: 10.1136/svn-2023-002333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 04/07/2023] [Indexed: 04/26/2023] Open
Abstract
Intracranial atherosclerotic disease (ICAD) is a common cause of ischaemic stroke and transient ischaemic attack (TIA) with a high recurrence rate. It is often referred to as intracranial atherosclerotic stenosis (ICAS), when the plaque has caused significant narrowing of the vessel lumen. The lesion is usually considered 'symptomatic ICAD/ICAS' (sICAD/sICAS) when it has caused an ischaemic stroke or TIA. The severity of luminal stenosis has long been established as a prognostic factor for stroke relapse in sICAS. Yet, accumulating studies have also reported the important roles of plaque vulnerability, cerebral haemodynamics, collateral circulation, cerebral autoregulation and other factors in altering the stroke risks across patients with sICAS. In this review article, we focus on cerebral haemodynamics in sICAS. We reviewed imaging modalities/methods in assessing cerebral haemodynamics, the haemodynamic metrics provided by these methods and application of these methods in research and clinical practice. More importantly, we reviewed the significance of these haemodynamic features in governing the risk of stroke recurrence in sICAS. We also discussed other clinical implications of these haemodynamic features in sICAS, such as the associations with collateral recruitment and evolution of the lesion under medical treatment, and indications for more individualised blood pressure management for secondary stroke prevention. We then put forward some knowledge gaps and future directions on these topics.
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Affiliation(s)
- Yuying Liu
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China
| | - Shuang Li
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China
| | - Xuan Tian
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China
| | - Thomas W Leung
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China
| | - Liping Liu
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, People's Republic of China
| | - David S Liebeskind
- Department of Neurology, Neurovascular Imaging Research Core, University of California Los Angeles, Los Angeles, California, USA
| | - Xinyi Leng
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong SAR, People's Republic of China
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