Derivation and Validation of the Aortic Valve Echocardiographic Calcium Score to Confirm Severe Aortic Stenosis: the Echo-AVCS Study (Echo-AVCS)
2026年6月3日 更新者:Emanuele Barbato、Azienda Ospedaliera "Sant'Andrea"
The Echo-AVCS Study is an investigator-initiated, prospective, multicenter observational study designed to derive and validate an artificial intelligence (AI)-based echocardiographic aortic valve calcium score (Echo-AVCS) for confirming severe aortic stenosis (AS).
Transthoracic echocardiography (TTE) is the standard imaging modality for assessing AS severity; however, discrepancies between valve area and transvalvular gradient measurements may complicate diagnosis, particularly in low-flow or discordant AS presentations.
Cardiac computed tomography (CT)-derived aortic valve calcium scoring is currently used to resolve diagnostic uncertainty, but it involves additional cost and radiation exposure.
This study will enroll consecutive adult patients undergoing clinically indicated TTE and cardiac CT with calcium scoring performed within 3 months.
Standardized echocardiographic images will be centrally analyzed using dedicated AI-based image segmentation and machine learning methods to quantify aortic valve calcification directly from TTE images.
CT-derived aortic valve calcium score will serve as the reference standard.
The primary objective is to derive and validate the Echo-AVCS score for identifying severe AS.
Secondary objectives include determination of sex-specific diagnostic thresholds, correlation with CT calcium volume, association with symptoms and NYHA class, and evaluation of prognostic associations with aortic valve replacement, heart failure hospitalization, cardiovascular events, and mortality at 1-year follow-up.
調査の概要
研究の種類
観察的
入学 (推定)
250
連絡先と場所
このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。
研究連絡先
- 名前:Emanuele Barbato, Full Professor
- 電話番号:0633778763
- メール:emanuele.barbato@uniroma1.it
研究場所
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Bologna、イタリア
- 募集
- University of Bologna
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コンタクト:
- Carmine Pizzi
- メール:carmine.pizzi@unibo.it
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副調査官:
- Luca Bergamaschi
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副調査官:
- Matteo Armillotta
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副調査官:
- Francesco Angeli
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Milan、イタリア
- 募集
- Centro Cardiologico Monzino
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コンタクト:
- Gianluca Pontone
- 電話番号:02 58002574
- メール:gianluca.pontone@cardiologicomonzino.it
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副調査官:
- Saima Mushtaq, MD, PhD
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副調査官:
- Maria Elisabetta Mancini, MD
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Milan、イタリア
- 募集
- IRCCS Galeazzi-Sant'Amborgio
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コンタクト:
- Edoardo Conte
- メール:edoardo.conte86@gmail.com
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副調査官:
- Tommaso Viva
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副調査官:
- Davide Marchetti
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Milan、イタリア
- 積極的、募集していない
- Politecnico di Milano
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Roma、イタリア
- 募集
- Sant'Andrea University Hospital
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副調査官:
- Pasquale Paolisso, MD, PhD
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副調査官:
- Marta Belmonte, MD, PhD
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コンタクト:
- Emanuele Barbato, Full Professor
- 電話番号:0633778763
- メール:emanuele.barbato@uniroma1.it
-
コンタクト:
- Pasquale Paolisso, MD, PhD
- メール:pasquale.paolisso@gmail.com
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-
参加基準
研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。
適格基準
就学可能な年齢
- 大人
- 高齢者
健康ボランティアの受け入れ
いいえ
サンプリング方法
確率サンプル
調査対象母集団
The Echo-CA score Study is an investigator-initiated, prospective, multicenter study of consecutive patients undergoing clinically indicated standard transthoracic echocardiography and cardiac CT with available calcium score performed within 3 months.
The study population is expected to include approximately 50% patients with severe AS and 50% without severe AS, in order to ensure a balanced case-control distribution and optimize the precision of diagnostic performance estimates.
All patients will be managed according to current standards of care.
Clinical evaluation will include systematic collection of cardiovascular risk factors, comorbidities, medical therapy, and detailed symptom assessment (angina, syncope, dyspnea), as well as NYHA functional class.
Each participant will undergo: i) comprehensive transthoracic echocardiography (TTE) performed according to current ESC Guideline; ii) cardiac CT with aortic valve calcium quantification, performed according to contemporary acquisiti
説明
Inclusion Criteria:
- Age > 18 years old
- Clinical indication for standard transthoracic echocardiography.
- Clinical indication for cardiac CT with available calcium score.
- 3-month time interval between transthoracic echocardiography and cardiac CT.
- Able to give informed consent.
Exclusion Criteria:
- Patients with inadequate transthoracic echocardiographic images.
- Poor quality cardiac CT, inadequate for standard calcium score assessment.
- Patients with known prior stents and/or coronary artery bypass grafts.
- Patients with known previous percutaneous or surgical aortic valve replacement.
- Patients with active or a history of endocarditis.
- Patients with congenital heart defects (other than isolated bicuspid aortic valve).
研究計画
このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。
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 |
介入・治療 |
|---|---|
|
Patients undergoing transthoracic echocardiography and cardiac-CT with available calcium score
Consecutive patients undergoing clinically indicated standard transthoracic echocardiography and cardiac CT with available calcium score performed within 3 months
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This is a non-interventional, observational study in which all patients will undergo clinically indicated standard-of-care transthoracic echocardiography (TTE) and cardiac computed tomography (CT) with aortic valve calcium scoring.
No investigational drug, device, or additional invasive procedure will be administered as part of the study.
Echocardiographic images acquired during routine clinical practice will be anonymized and centrally analyzed using dedicated artificial intelligence-based software to derive and validate the echocardiographic aortic valve calcium score.
Patient management, follow-up, and therapeutic decisions, including referral for aortic valve replacement, will remain entirely at the discretion of the treating physicians according to current clinical guidelines and standard practice.
|
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 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Derivation of Echo-AVCS
時間枠:6 months
|
To derive an echocardiographic aortic valve calcium score (Echo-AVCS) for confirming severe aortic stenosis (AS), using CT-derived aortic valve calcium as the reference standard.
|
6 months
|
|
Validation of Echo-AVCS
時間枠:6 months
|
To validate an echocardiographic aortic valve calcium score (Echo-AVCS) for confirming severe aortic stenosis (AS), using CT-derived aortic valve calcium as the reference standard.
|
6 months
|
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Sex-specific thresholds
時間枠:6 months
|
To determine sex-specific thresholds (male vs. female) for the echocardiographic aortic valve calcium score (Echo-AVCS).
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6 months
|
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Correlation between the echocardiographic aortic valve calcium score and the calcium volume (mm³)
時間枠:6 months
|
To assess the correlation between the echocardiographic aortic valve calcium score and the calcium volume (mm³) measured by cardiac computed tomography.
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6 months
|
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Correlation of the echocardiographic aortic valve calcium score and the presence and occurrence of patient symptoms
時間枠:1-year
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To correlate the echocardiographic aortic valve calcium score and the presence and occurrence of patient symptoms (angina, syncope, and dyspnea).
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1-year
|
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Association between the echocardiographic aortic valve calcium score and the time to aortic valve replacement (AVR)
時間枠:1 year
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To evaluate the association between the echocardiographic aortic valve calcium score and the time to aortic valve replacement (AVR) according to current ESC Guidelines.
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1 year
|
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Correlation of the echocardiographic aortic valve calcium score with the patient's NYHA Class.
時間枠:1 year
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To correlate the echocardiographic aortic valve calcium score with the patient's NYHA Class.
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1 year
|
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Correlation of the echocardiographic aortic valve calcium score with all-cause death at 1-year follow-up.
時間枠:1 year
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To correlate the echocardiographic aortic valve calcium score with all-cause death at 1-year follow-up.
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1 year
|
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Correlation of the echocardiographic aortic valve calcium score with cardiovascular death at 1-year follow-up.
時間枠:1 year
|
To correlate the echocardiographic aortic valve calcium score with cardiovascular death at 1-year follow-up.
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1 year
|
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Correlation of the echocardiographic aortic valve calcium score with hospitalization for heart failure at 1-year follow-up.
時間枠:1 year
|
To correlate the echocardiographic aortic valve calcium score with hospitalization for heart failure at 1-year follow-up.
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1 year
|
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Correlation of the echocardiographic aortic valve calcium score with major adverse cardiovascular events (cardiovascular death and hospitalization for heart failure) at 1-year follow-up.
時間枠:1 year
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To correlate the echocardiographic aortic valve calcium score with major adverse cardiovascular events (cardiovascular death and hospitalization for heart failure) at 1-year follow-up.
|
1 year
|
協力者と研究者
ここでは、この調査に関係する人々や組織を見つけることができます。
研究記録日
これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。
主要日程の研究
研究開始 (実際)
2026年3月1日
一次修了 (推定)
2026年12月31日
研究の完了 (推定)
2027年12月31日
試験登録日
最初に提出
2026年5月27日
QC基準を満たした最初の提出物
2026年5月27日
最初の投稿 (実際)
2026年6月2日
学習記録の更新
投稿された最後の更新 (実際)
2026年6月4日
QC基準を満たした最後の更新が送信されました
2026年6月3日
最終確認日
2026年5月1日
詳しくは
本研究に関する用語
追加の関連 MeSH 用語
その他の研究ID番号
- 0335/2026
個々の参加者データ (IPD) の計画
個々の参加者データ (IPD) を共有する予定はありますか?
未定
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
いいえ
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いいえ
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