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https://www.med.cuhk.edu.hk/press-releases/cuhk-advocates-stringent-control-of-cardiovascular-risks-for-reopening-of-narrowed-brain-arteries---a-new-paradigm-to-prevent-recurrent-stroke-available-in-chinese-only
https://www.med.cuhk.edu.hk/press-releases/cuhk-advocates-stringent-control-of-cardiovascular-risks-for-reopening-of-narrowed-brain-arteries---a-new-paradigm-to-prevent-recurrent-stroke-available-in-chinese-only
CUHK Advocates Stringent Control of Cardiovascular Risks for Reopening of Narrowed Brain Arteries - A New Paradigm to Prevent Recurrent Stroke (Available in Chinese only)

CUHK Advocates Stringent Control of Cardiovascular Risks for Reopening of Narrowed Brain Arteries - A New Paradigm to Prevent Recurrent Stroke (Available in Chinese only)

1. 研究背景

  • 中風屬於急性病症,是本港成年人永久致殘的主因
  • 中風主要分為兩種類型:一種是由血栓或栓塞所造成的缺血(缺乏血液供應)(ischemic stroke);一種是由出血所造成的(hemorrhagic stroke)
  • 整個亞洲區內,誘發缺血性中風的最普遍成因是髗內血管粥樣硬化 (Intracranial Atherosclerotic Disease – ICAD / intracranial stenosis)
  • 據以往統計,患者一年內復發率可高至20%,顯示沿用的藥物治療方案效果有欠理想

 

 

2. 研究目的

  • 透過前瞻性、學術導向的研究,評估症狀性腦動脈粥樣硬化在藥物治療下的演變過程,有助提供科學依據來了解中風復發機制及優化預防策略

 

 

3. 研究方法

  • 在2006年至2013年間,招募了50位因高程度(≥70%)腦動脈粥樣硬化狹窄導致(high-grade ICAD stenosis)的中風患者(平均年齡63.4歲)參與研究。

  • 參加者分別於藥物治療開始前及開始後12個月接受3D旋轉血管造影檢查(3-dimentional rotational angiography – 3DRA),以評估腦動脈粥樣硬化演變情況

  • 參加者接受嚴格的藥物治療方案,以控制容易導致心血管疾病的高危因素,見下表:

 

現行中風患者藥物治療控制指標與更嚴格的標準對比

 

風險因素

Risk Factors

現行指標

Current Baseline

研究倡議之新標準

Suggested Baseline

戒煙建議戒煙建議戒煙並積極跟進

低密度蛋白膽固醇

(low-density lipoprotein)

<2.6mmol/L<1.8 mmol/

糖化血色素

(glycosylated hemoglobin / HbA1c)

7.0%6.0%

收縮壓

(systolic blood pressure)

<140mmHg

<130mmHg
(*按病人血管狀況而定
Depends on vascular

condition of patients)

  • 另外,我們亦評估了中風復發患者的腦梗塞形態學(infarct topography),並對其進行了微栓子(microemboli)監測
  • 對照組為143位腦動脈粥樣硬化狹窄導致的中風患者
    (參與了本中心另一項已經發布成果的研究)

 

 

 4. 研究結果

  • 總體而言,動脈粥樣硬化狹窄由79%降至63%(p<0.001)
  • 90%參加者的腦血管硬化閉塞沒有加重或出現顯著好轉(詳見下表)

患者動脈粥樣硬化狹窄演變情況

Qualifying Lesions

人數 (佔總人數比率)

Number (%)

顯著好轉(狹窄程度降低>10%)

Remarkably regressed (stenosis reduced >10%)

 

24位 (49%)

閉塞沒有加重(狹窄程度降低±10%)

Remained quiescent (stenosis same or ±10%)

 

21位 (43%)

加重 (狹窄程度增高>10%)

Progressed (stenosis increased >10%)

4位 (8%)

  • 在危險因素控制力度上,所有患者(包括出現或未出現中風復發,或是狹窄好轉/無加重/加重)均無差別
  • 接受藥物治療前糖化血色素越高的患者出現更為明顯的狹窄好轉
  • 在一年後的臨牀及血管造影跟進中,發現6位患者出現了中風復發,其中5位的腦梗塞型態為沿著內部或前分水嶺區單一的、或串珠樣病灶(soitary or rosary like acute infarcts along the internal or anterior boarder zones),2位在經顱多普勒超聲(transcrania Doppler ultrasound - TCD)檢查中出現微栓子陽性(microemboic signals)。
  • 新藥物治療方案成功令中風復發率由23%降至14%

 

 

5. 總結

  • 經12個月的嚴格藥物治療後,大多數的症狀性動脈粥樣硬化狹窄閉塞沒有加重或出現顯著好轉

  • 動脈-動脈栓塞(artery-to-artery thromboembolism)並分水嶺區血管的栓子清除率下降(impaired washout at boarder zones)則為中風復發(stroke recurrence)的常見機制

  • 研究結果已於國際期刊Annals of Neurology 2015年3月號發表,期望此中風藥物治療的新標準將使本港,以至亞洲更多中風患者受益

 

(From left) Dr. Thomas Wai Hong LEUNG, Lee Quo Wei Associate Professor of Neurology, and Dr. Yannie Oi Yan SOO, Clinical Assistant Professor (honorary), from the Department of Medicine and Therapeutics at CUHK advocates a stringent control of cardiovascular risk factor to reopen narrowed brain arteries. By the end of the first year of the study, the high-grade arterial stenosis either remained quiescent or remarkably regressed in over 90% of the participants.

(From left) Dr. Thomas Wai Hong LEUNG, Lee Quo Wei Associate Professor of Neurology, and Dr. Yannie Oi Yan SOO, Clinical Assistant Professor (honorary), from the Department of Medicine and Therapeutics at CUHK advocates a stringent control of cardiovascular risk factor to reopen narrowed brain arteries. By the end of the first year of the study, the high-grade arterial stenosis either remained quiescent or remarkably regressed in over 90% of the participants. 

The arterial stenosis of Mr. Lo (middle), who was diagnosed stroke 5 years ago, has diminished from 79% to 58% after a year of aggressive medical approach in controlling risk factors such as blood sugar, blood pressure and lipid levels.

The arterial stenosis of Mr. Lo (middle), who was diagnosed stroke 5 years ago, has diminished from 79% to 58% after a year of aggressive medical approach in controlling risk factors such as blood sugar, blood pressure and lipid levels.

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CUHK Survey Reveals Relationship between Exercise Pattern and Emotional Health among Hong Kong People Mind-body Exercise Helps Reduce Risk of Mood Disorders

Research
CUHK Establishes State Key Laboratory of Digestive Disease to Improve Diagnosis and Treatment of Digestive Diseases

CUHK Establishes State Key Laboratory of Digestive Disease to Improve Diagnosis and Treatment of Digestive Diseases

Research
CUHK Assessed and Treated Over 300 Young Ketamine Abusers with Urinary Tract Dysfunction Latest Research Reveals Effectiveness of Integrated Anti-inflammatory Therapy

CUHK Assessed and Treated Over 300 Young Ketamine Abusers with Urinary Tract Dysfunction Latest Research Reveals Effectiveness of Integrated Anti-inflammatory Therapy

Research
CUHK Research Reveals that Physical and Cognitive Activities can Maintain and Improve Brain Functions of Patients with Mild Cognitive Impairments

CUHK Research Reveals that Physical and Cognitive Activities can Maintain and Improve Brain Functions of Patients with Mild Cognitive Impairments

Research
CUHK Launches Territory-wide Screening Study for Early Detection of Nasopharynx Cancer Now Recruiting 20,000 Citizens to Join

CUHK Launches Territory-wide Screening Study for Early Detection of Nasopharynx Cancer Now Recruiting 20,000 Citizens to Join

Research
CUHK Research Reveals Impact of Mild Hearing Loss on School Children Now Recruiting Hearing Impaired Students for Research on Efficacy of Intervention

CUHK Research Reveals Impact of Mild Hearing Loss on School Children Now Recruiting Hearing Impaired Students for Research on Efficacy of Intervention

Research
CUHK-HCC Score Accurately Predicts Risk of Liver Cancer in Chronic Hepatitis B Patients Receiving Antiviral Therapy

CUHK-HCC Score Accurately Predicts Risk of Liver Cancer in Chronic Hepatitis B Patients Receiving Antiviral Therapy

Research
CUHK and Shanghai Jiao Tong University Discover Genetic Predictor of Diabetes in Chinese Patients

CUHK and Shanghai Jiao Tong University Discover Genetic Predictor of Diabetes in Chinese Patients

Research
CUHK Pioneers the Use of 3D Echocardiography to Identify At-Risk Mitral Valve Prolapse Patients

CUHK Pioneers the Use of 3D Echocardiography to Identify At-Risk Mitral Valve Prolapse Patients

Research
CUHK discovers that 40% of Individuals at Risk of Coronary Heart Disease have Pre-cancerous Bowel Tumors

CUHK discovers that 40% of Individuals at Risk of Coronary Heart Disease have Pre-cancerous Bowel Tumors

Research
CUHK will hold 'SARS A Decade On: A Conference for the Health Professionals'

CUHK will hold 'SARS A Decade On: A Conference for the Health Professionals'

Symposium
CUHK Advocates Palliative Care for Advanced Dementia Patients with Swallowing Problems

CUHK Advocates Palliative Care for Advanced Dementia Patients with Swallowing Problems

Research
CUHK Develops an Automatic Retinal Image Analysis System to Help Diabetes Patients and Elderly Prevent Stroke

CUHK Develops an Automatic Retinal Image Analysis System to Help Diabetes Patients and Elderly Prevent Stroke

Research
CUHK Study Reveals High Salt Intake Will Lead to High Blood Pressure and Higher Risk of Stroke

CUHK Study Reveals High Salt Intake Will Lead to High Blood Pressure and Higher Risk of Stroke

Research
CUHK Launches Territory-wide Sleep Health Education Campaign to Promote Healthy Sleep and Healthy School Life

CUHK Launches Territory-wide Sleep Health Education Campaign to Promote Healthy Sleep and Healthy School Life

Health Campaign
CUHK and HKU's Collaborative Research Discovers Novel Epilepsy Genetic Markers

CUHK and HKU's Collaborative Research Discovers Novel Epilepsy Genetic Markers

Research
CUHK Advocates Early Detection of Chronic Kidney Diseases Joined by Leading Nephrologists to Make Sound Recommendations

CUHK Advocates Early Detection of Chronic Kidney Diseases Joined by Leading Nephrologists to Make Sound Recommendations

Research
The Official Launch of E-community Surveillance System for Influenza-like illness (EcSS) by CUHK

The Official Launch of E-community Surveillance System for Influenza-like illness (EcSS) by CUHK

Health Campaign
Three CUHK Scholars Named Croucher Senior Research Fellow 2011-12

Three CUHK Scholars Named Croucher Senior Research Fellow 2011-12

Awards and honors
CUHK Research Findings on Severe Human Swine Flu in Hong Kong

CUHK Research Findings on Severe Human Swine Flu in Hong Kong

Research

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