环状与亚状的方法对急性缺血性 mitrale 吐
Tomasz A Timek1, David T Lai, Frederick Tibayan
1Department of Cardiovascular and Thoracic Surgery and Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, Calif., USA.
Circulation
|October 2, 2002
概括
通过重新定位乳头肌肉,减少环状尺寸有效地治疗缺血性腹反 (IMR). 然而,减少皮膜间距离并没有改善IMR,提供了对急性IMR机制的见解.
科学领域:
- 心血管研究研究心血管研究
- 心脏机械学 心脏机械学
- 手术创新 在外科创新.
背景情况:
- 缺血性额外 (IMR) 与额外环扩张和乳头肌肉位移有关.
- 了解IMR的精确机制对于开发有效的治疗方法至关重要.
研究的目的:
- 为了比较在急性IMR中减少环状与亚膜尺寸的有效性.
- 为了获得有关IMR病理生理学的机制性见解.
主要方法:
- 在成年绵羊体内植入放射性不透明标记物以跟踪心脏结构.
- 七面侧面 (SL) 环状和肌膜间肌肉 (PAPS) sutures 被用来诱导受控的 cinching.
- 双飞机视频光学和食管横心声学评估了缺血期间的IMR严重程度和维度变化.
主要成果:
- Septal-lateral环状结合 (SLAC) 显著降低了IMR的严重程度和环状直径.
- 此外,SLAC还减少了乳头肌肉尖端和中部隔膜环之间的距离.
- 卷膜间 suture tightening (PAPS) 减少了卷膜间距离,但没有改善IMR.
结论:
- 通过减少环状尺寸,可以消除急性IMR,这也会重新定位乳头肌肉.
- 仅仅减少毛囊间尺寸对治疗急性IMR无效.
- 环状减小为管理IMR提供了一种有前途的方法,这对外科手术策略有影响.
相关概念视频
Mitral Regurgitation I: Introduction
Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
Mitral Regurgitation II: Clinical Features and Diagnostic Tests
Mitral regurgitation (MR) is a valvular heart disorder in which the mitral valve fails to close tightly, allowing blood to leak backward into the heart. Understanding the clinical manifestations, assessment, diagnostic findings, and medical management of MR is crucial to effectively managing affected patients.Clinical Manifestations of Mitral RegurgitationMitral regurgitation can be acute or chronic, each presenting differently and requiring different approaches:1. Acute Mitral...
Mitral 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...
Mitral Regurgitation IV: Nursing Management
Mitral regurgitation (MR) is a condition where the mitral valve does not close properly, leading to the backward flow of blood from the left ventricle into the left atrium during systole. This condition can arise from various causes, including rheumatic fever, infective endocarditis, or degenerative valve disease. Effective nursing management is crucial to optimizing patient outcomes and involves comprehensive assessment and targeted interventions.Comprehensive Patient AssessmentA detailed...
Mitral 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...
Mitral 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...


