Renal Nerve Ablation in Chronic Kidney Disease Patients
Understanding the Mechanisms of Progressive Decrease in Blood Pressure After Renal Nerve Ablation
In patients with treatment resistent hypertension renal nerve ablation emerged as an effective interventional approach of treating hypertensive disease with a progressively increasing fall in blood pressure. Decreased activity of the sympathetic nervous system is one of the major underlying pathogenetic mechanism of the fall in blood pressure but the precise mechanisms that causes the fall in blood pressure in the short-term and, in particular, long-term remains elusive. The objective of the study is to understand the pathogenetic mechanisms of renal denervation beyond the reduced activity of the sympathetic nervous system. In 100 hypertensive patients most advanced technology will be applied, before and repeatedly after renal denervation, throughout the follow-up period of 1 year. Systemic activity of the renin angiotensin aldosterone system, renal perfusion (by MRI spin labelling technique), local activity of the renin angiotensin system in the kidney (urinary angiotensinogen concentrations), sodium excretion and total sodium content (23 Na-MRI technique) and vascular remodelling of small (retinal arterioles 50 - 150 µm) and large arteries (carotid - femoral pulse wave velocity and augmentation index, both measured over 24 hours) will be assessed. Identification of the pathogenetic mechanisms involved in the fall in blood pressure after renal denervation may help to identify those hypertensive patients that profit most from renal nerve ablation in terms of blood pressure reduction.
The investigators propose the following hypotheses why a progressive decrease in blood pressure happens, in addition to the decreased activity of the central nervous system, after renal nerve ablation:
Short term effects:
A)Preservation of renal function and perfusion B)Reduction of local RAS activity in the kidney C)Exaggerated sodium excretion immediately after renal nerve ablation
Long term effects:
D)Decrease of total sodium content after 6 and 12 months. E)Improvement of vascular wall properties after 6 and 12 months
調査の概要
状態
状態
条件
条件
介入・治療
介入・治療
詳細な説明
研究の種類
研究の種類
入学 (実際)
入学
連絡先と場所
研究場所
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-
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Erlangen、ドイツ、91054
- Clinical Research Unit, Department of Nephrology and Hypertension, University of Erlangen-Nürnberg
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Lübeck、ドイツ
- Joachim Weil
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参加基準
適格基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
サンプリング方法
調査対象母集団
説明
Inclusion Criteria:
- treatment resistant hypertension
- chronic kidney disease 3 - 5
- male of female aged over 18 years
- written informed consent
- agreement to attend all study visits as planned in the protocol
Exclusion Criteria:
- any contraindications for MRI
- claustrophobia
- strabismus
- severe ocular diseases
- history of epilepsia
研究計画
研究はどのように設計されていますか?
デザインの詳細
グループ/コホートの数
コホートと介入
グループ/コホートグループ/コホート |
介入・治療介入・治療 |
|---|---|
|
treatment resistant hypertensives with CKD 3-5
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percutaneous selective renal sympathetic nerve ablation with the use of the Simplicity Catheter system
|
この研究は何を測定していますか?
主要な結果の測定
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
office BP
時間枠:baseline, 6 months
|
Change in office blood pressure from baseline to 6 months post-renal nerve ablation
|
baseline, 6 months
|
|
24-h ABPM
時間枠:baseline, 6 months
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Change in 24 hour ambulatory blood pressure (ABPM) from baseline to 6 months post-renal nerve ablation
|
baseline, 6 months
|
|
Magnetic resonance imaging (MRI)
時間枠:baseline, 6 months
|
|
baseline, 6 months
|
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Albuminuria
時間枠:baseline, 6 months
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Change in urinary albumin/creatinine ratio from baseline to 6 months post renal nerve ablation (spot urine)
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baseline, 6 months
|
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local RAS activity
時間枠:baseline, 6 months
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Change in urinary angiotensinogen concentration from the morning spot urine from baseline to 6 months post-renal nerve ablation
|
baseline, 6 months
|
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systemic RAS activity
時間枠:baseline, 6 months
|
|
baseline, 6 months
|
|
vascular structure and function of large and small arteries
時間枠:baseline, 6 months
|
|
baseline, 6 months
|
二次結果の測定
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
BP
時間枠:1 and 12 months
|
|
1 and 12 months
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local RAS activity
時間枠:1 day and 1 months
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Change in urinary angiotensinogen concentration from the morning spot urine from baseline to 1 day and 1 months post-renal nerve ablation
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1 day and 1 months
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systemic RAS activity
時間枠:1 day and 1 months
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1 day and 1 months
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vascular structure and function of large and small arteries
時間枠:12 months
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12 months
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MRI
時間枠:1 day, 1 and 12 months
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1 day, 1 and 12 months
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協力者と研究者
捜査官
捜査官
- 主任研究者:Roland E Schmieder, MD、University of Erlangen-Nürnberg, Germany
出版物と役立つリンク
一般刊行物
- Schmieder RE, Ott C, Schmid A, Friedrich S, Kistner I, Ditting T, Veelken R, Uder M, Toennes SW. Adherence to Antihypertensive Medication in Treatment-Resistant Hypertension Undergoing Renal Denervation. J Am Heart Assoc. 2016 Feb 12;5(2):e002343. doi: 10.1161/JAHA.115.002343.
- Schmid A, Schmieder R, Lell M, Janka R, Veelken R, Schmieder RE, Uder M, Ott C. Mid-Term Vascular Safety of Renal Denervation Assessed by Follow-up MR Imaging. Cardiovasc Intervent Radiol. 2016 Mar;39(3):426-32. doi: 10.1007/s00270-015-1192-2. Epub 2015 Aug 8.
- Ott C, Mahfoud F, Schmid A, Toennes SW, Ewen S, Ditting T, Veelken R, Ukena C, Uder M, Bohm M, Schmieder RE. Renal denervation preserves renal function in patients with chronic kidney disease and resistant hypertension. J Hypertens. 2015 Jun;33(6):1261-6. doi: 10.1097/HJH.0000000000000556.
研究記録日
主要日程の研究
研究開始 (実際)
研究開始
一次修了 (実際)
一次修了
研究の完了 (実際)
研究の完了
試験登録日
最初に提出
最初に提出
QC基準を満たした最初の提出物
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
最初の投稿
学習記録の更新
投稿された最後の更新 (実際)
投稿された最後の更新
QC基準を満たした最後の更新が送信されました
QC基準を満たした最後の更新が送信されました
最終確認日
最終確認日
詳しくは
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