二次コードの切断は,急性不全性ミトラル反吐を防ぐことはできません
Filiberto Rodriguez1, Frank Langer, Katherine B Harrington
1Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, Calif 94305-5247, USA.
Circulation
|September 15, 2004
まとめ
切断された前頭部ミトラレフレット二次性コルデは,羊の急性性不全性ミトラレグルジテーション (IMR) を予防しませんでした. この処置は収縮機能を悪化させ,IMRの重症度や関連する解剖学的変化を軽減しませんでした.
科学分野:
- 心血管外科手術についてです.
- 心臓のメカニズム 心臓のメカニズム
- ミトラルバルブ病の症状について
背景:
- 発血性ミトラル反発 (IMR) は,心筋梗塞の一般的な合併症です.
- IMRを治療するための外科的手法として,帯切断が提案されています.
- 急性IMRを予防する上で,前頭部外皮切断の有効性は,さらなる調査を必要としています.
研究 の 目的:
- 急性不全性ミトラル吐 (IMR) の予防における前頭部ミトラル吐の切断の効果を評価する.
- 急性イシュケミア中の左心室 (LV) のシストリック機能とミトラル弁の幾何学に,この帯切断の影響を評価する.
主な方法:
- 6頭の羊は,3Dの座標を取得するために放射性オパックマーカーを配置した.
- 二次性ホルダが特定され,ワイヤトラップで囲まれました.
- バイプレンのビデオ光鏡検査とカラードップラー食道横断エコーカルディオグラフィーを用いて,急性性イシュケミア前後,帯切断前後,急性性イシュケミア前後,帯反吐 (MR) とLV機能の評価を行った.
主要な成果:
- 帯切断は,前葉の屈折角を増加させたが,有効な葉の長さを変化させなかった.
- PRSWによって評価された左心室の静脈収縮機能は,弦管切断後に著しく低下しました.
- 急性イシュケミアは,弦切断に関係なく,環状の膨張,後部パピラ筋の移動,および小冊子のテンティング面積と体積の増加を誘発した.
- ミトラル吐は,イシュケミア中に著しく増加し,この増加は二次性切断によって弱まりませんでした.
結論:
- 切断された前頭部ミトラレフレット二次性コルデは,急性IMRの重症を予防したり軽減したりしませんでした.
- この処置の結果,左心室のシストリック機能が低下した.
- 帯状切断は,イシュケミア誘発の環状膨張,小冊子のテンティング面積,または小冊子のテンティング容量を軽減しませんでした.
関連する概念動画
01:16Vascular Spasm
The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last for...
01:25Mitral Regurgitation III: Medical Management
Mitral regurgitation (MR) is characterized by retrograde blood circulation from the left ventricle into the left atrium due to inadequate mitral valve closure. The severity of the condition, symptoms, and underlying cause determine treatment strategies.Monitoring and Pharmacological TreatmentPatients with mild to moderate MR typically do not need immediate intervention but regular monitoring to assess progression and guide treatment. Patients with mild MR should have an echocardiogram every 3-5...
01:22Mitral Stenosis I: Introduction
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
01:23Mitral Stenosis II: Clinical features and Diagnostic Tests
Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
01:26Mitral Stenosis III: Medical Management
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...
01:26Aneurysm III: Interprofessional Care
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...