Anatomic Stenosis Severity as a Prognostic Marker in Patients With Low-Flow Low-Gradient Aortic Stenosis Undergoing TAVI (ATLAS TAVI)
AnaTomic Stenosis Severity Derived From Computed Tomography as a Prognostic Marker in Patients With Low-flow Low-gradient Aortic Stenosis Undergoing Transcatheter Aortic Valve Implantation
調査の概要
詳細な説明
Aortic valve calcification (AVC) as assessed by MSCT is highly correlated with aortic stenosis (AS) severity and, thus, has become an important tool for diagnosing severe AS, especially in patients with low-flow low-gradient aortic stenosis (LFLG AS). Moreover, in medically treated AS patients AVC is directly associated with poor prognosis. In contrast, the prognostic benefit of eliminating AS by Transcatheter Aortic Valve Implantation (TAVI) in patients with LFLG AS seems to be larger in patients with high AVC density (AVCd) compared to those with low AVCd, at least in "classical" (low EF) LFLG AS. Hence, we hypothesize that AVCd might be a valuable marker for treatment response among TAVI patients with LFLG AS, who are known to suffer from poor outcome even after elimination of AS.
The multicentric ATLAS TAVI Registry of LFLG AS patients, who underwent TAVI, assesses the impact of AVCd on outcome in these patients.
研究の種類
入学 (予想される)
連絡先と場所
研究連絡先
- 名前:Niklas Schofer, MD
- 電話番号:+49-40-7410-0
- メール:n.schofer@uke.de
研究場所
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Edinburgh、イギリス
- 募集
- University of Edinburgh
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コンタクト:
- Mark Dweck, MD
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Petah Tikva、イスラエル
- 募集
- Rabin Medical Center
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コンタクト:
- Uri Landes, MD
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Rotterdam、オランダ
- 募集
- Erasmus University Medical Centre
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コンタクト:
- Nicolas van Mieghem, MD
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Montréal、カナダ
- 募集
- Montreal Heart Institute
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コンタクト:
- Walid Ben Ali, MD
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Québec、カナダ
- 募集
- Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval
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コンタクト:
- Marie-Annick Clavel, PhD
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Odense、デンマーク
- 募集
- Odense University Hospital
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コンタクト:
- Jordi Dahl, MD
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Bad Nauheim、ドイツ
- 募集
- Kerckhoff-Klinik
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コンタクト:
- Won K Kim, MD
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Hamburg、ドイツ
- 募集
- University Heart and Vascular Center Hamburg
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Leipzig、ドイツ
- 募集
- Heart Center Leipzig
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コンタクト:
- Mohamed Abdel-Wahab, MD
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Lille、フランス
- 募集
- CHU de Lille
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コンタクト:
- Augustin Coisne, MD
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Paris、フランス
- 募集
- Hôpital Bichat - Claude-Bernard
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コンタクト:
- Marina Urena Alcazar, MD
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参加基準
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:
- age ≥18 years
- patient gave written informed consent for data acquisition and transfer
- for LFLG AS: -- available non-contrast MSCT data on aortic valve calcification (AVC, Agatston Units)
Exclusion Criteria:
- LFLG AS without non-contrast MSCT data on AVC
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
コホートと介入
グループ/コホート |
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Classical Low-Flow, Low-Gradient Aortic Stenosis
Classical Low-Flow, Low-Gradient Aortic Stenosis is defined as valve area <1 cm2, mean gradient <40 mmHg, ejection fraction <50% and stroke volume index (SVi) ≤35 mL/m2 by resting transthoracic echocardiography.
Dobutamine stress echocardiography is not mandatory for the definition of classical LFLG AS.
All patients in this subgroup underwent TAVI and have available data on aortic valve calcification.
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Paradoxical Low-Flow, Low-Gradient Aortic Stenosis
Paradoxical Low-Flow, Low-Gradient Aortic Stenosis is defined as valve area <1 cm2, mean gradient <40 mmHg, ejection fraction ≥50% and SVi ≤35 mL/m2 by resting transthoracic echocardiography.
All patients in this subgroup underwent TAVI and have available data on aortic valve calcification.
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High-Gradient Aortic Stenosis (Control group)
High-Gradient Aortic Stenosis is defined as valve area <1 cm2 and mean gradient >40 mmHg by resting transthoracic echocardiography.
All patients in this subgroup underwent TAVI.
Data on aortic valve calcification is not mandatory for this control group.
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Conservative treatment (Control group)
The subgroup includes all patients with (severe or non-severe) aortic stenosis, who underwent conservative treatment.
Data on aortic valve calcification is not mandatory for this control group.
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この研究は何を測定していますか?
主要な結果の測定
結果測定 |
時間枠 |
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全死因死亡
時間枠:12ヶ月
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12ヶ月
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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
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Cardiovascular Mortality
時間枠:12 months
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Incidence of cardiovascular death, defined as death attributable to myocardial ischemia and infarction, heart failure, cardiac arrest because of other or unknown cause, or cerebrovascular accident.
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12 months
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Rehospitalizations for congestive heart failure
時間枠:12 months
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Incidence of new-onset or worsening signs and symptoms of heart failure that required urgent therapy and resulted in hospitalization, e.g. as assessed by patient interviews or hospital records.
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12 months
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協力者と研究者
捜査官
- 主任研究者:Marie-Annick Clavel, PhD、Institut universitaire de cardiologie et de pneumologie de Québec, Québec, Canada
- 主任研究者:Niklas Schofer, MD、University Heart and Vascular Center Hamburg, Hamburg, Germany
- 主任研究者:Sebastian Ludwig, MD、University Heart and Vascular Center Hamburg, Hamburg, Germany
出版物と役立つリンク
一般刊行物
- Baumgartner H, Falk V, Bax JJ, De Bonis M, Hamm C, Holm PJ, Iung B, Lancellotti P, Lansac E, Rodriguez Munoz D, Rosenhek R, Sjogren J, Tornos Mas P, Vahanian A, Walther T, Wendler O, Windecker S, Zamorano JL; ESC Scientific Document Group. 2017 ESC/EACTS Guidelines for the management of valvular heart disease. Eur Heart J. 2017 Sep 21;38(36):2739-2791. doi: 10.1093/eurheartj/ehx391. No abstract available.
- Cueff C, Serfaty JM, Cimadevilla C, Laissy JP, Himbert D, Tubach F, Duval X, Iung B, Enriquez-Sarano M, Vahanian A, Messika-Zeitoun D. Measurement of aortic valve calcification using multislice computed tomography: correlation with haemodynamic severity of aortic stenosis and clinical implication for patients with low ejection fraction. Heart. 2011 May;97(9):721-6. doi: 10.1136/hrt.2010.198853. Epub 2010 Aug 18.
- Clavel MA, Messika-Zeitoun D, Pibarot P, Aggarwal SR, Malouf J, Araoz PA, Michelena HI, Cueff C, Larose E, Capoulade R, Vahanian A, Enriquez-Sarano M. The complex nature of discordant severe calcified aortic valve disease grading: new insights from combined Doppler echocardiographic and computed tomographic study. J Am Coll Cardiol. 2013 Dec 17;62(24):2329-38. doi: 10.1016/j.jacc.2013.08.1621. Epub 2013 Sep 24.
- Clavel MA, Pibarot P, Messika-Zeitoun D, Capoulade R, Malouf J, Aggarval S, Araoz PA, Michelena HI, Cueff C, Larose E, Miller JD, Vahanian A, Enriquez-Sarano M. Impact of aortic valve calcification, as measured by MDCT, on survival in patients with aortic stenosis: results of an international registry study. J Am Coll Cardiol. 2014 Sep 23;64(12):1202-13. doi: 10.1016/j.jacc.2014.05.066.
- Ludwig S, Gossling A, Waldschmidt L, Linder M, Bhadra OD, Voigtlander L, Schafer A, Deuschl F, Schirmer J, Reichenspurner H, Blankenberg S, Schafer U, Westermann D, Seiffert M, Conradi L, Schofer N. TAVR for low-flow, low-gradient aortic stenosis: Prognostic impact of aortic valve calcification. Am Heart J. 2020 Jul;225:138-148. doi: 10.1016/j.ahj.2020.03.013. Epub 2020 Apr 8.
研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (予想される)
研究の完了 (予想される)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
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
詳しくは
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