症状のない重度の大動脈狭窄症における大動脈弁置換対保守的治療:AVATAR試験
Marko Banovic1,2, Svetozar Putnik1,3, Martin Penicka4
1Belgrade Medical School, University of Belgrade, Serbia (M.B., S.P.).
Circulation
|November 15, 2021
まとめ
症状のない重度の大動脈狭窄症 (AS) の早期手術による大動脈弁置換 (SAVR) は,保守的な治療と比較して有害事象を著しく減少させた. これは,SAVRが症状を発症する前に有益である可能性を示唆しています.
科学分野:
- 心臓病科
- 心臓外科
- 臨床試験
背景:
- 症状のある患者における重度の大動脈狭窄症は,手術による大動脈弁置換 (SAVR) の明確な徴候である.
- 症状のない重症AS患者のSAVRの最適なタイミングと左心房機能の保存については,現在も調査中です.
研究 の 目的:
- 症状のない重症AS患者の早期SAVRと保守的な治療の安全性と有効性を評価する.
- 早期のSAVRが全因死亡,心筋梗塞,脳卒中,心不全の入院の複合エンドポイントを減少させるかどうかを判断する.
主な方法:
- AVATAR試験は前向きな国際的,ランダム化制御試験でした.
- 157人の症状のない重症ASと正常なLV機能の患者は,早期SAVRまたは保守的な治療にランダムに割り当てられました.
- 試験への含有には負の運動テストが必要で,主要評価項目は重篤な心血管疾患の組み合わせでした.
主要な成果:
- 追跡期間中位は32ヶ月で,157人の患者が分析されました.
- 早期手術グループ (n=78) は,保守的なグループ (n=79,26事件) に比べて,主要な複合エンドポイントイベント (13事件) が有意に少なかった (HR 0.46; P=0. 02).
- SAVRの手術による死亡率は1. 4%であり,二次的エンドポイントでは有意な差異は観察されなかったが,早期手術の傾向は好ましい.
結論:
- 症状のない重症AS患者の早期SAVRは,保守的な治療と比較して,主要心血管疾患の複合症を著しく減少させた.
- これらの発見は,症状の状況に関係なく,重症ASにおける早期SAVRを検討するための予備的な支持を提供します.
- ClinicalTrials.gov (NCT02436655) で登録されているAVATAR試験は,AS管理戦略に関する貴重な洞察を提供します.
さらに関連する動画
関連する概念動画
Aortic Regurgitation III: Medical Management
68
Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
68
Mitral Stenosis III: Medical Management
42
Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...
42
Aortic Regurgitation II: Clinical Features and Diagnostic Tests
76
Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
76
Aortic Regurgitation I: Introduction
71
IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...
71
Aneurysm III: Interprofessional Care
52
Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
52


