慢性心不全における左心室のサイズと機能に対する心臓再同期療法の効果
Martin G St John Sutton1, Ted Plappert, William T Abraham
1Division of Cardiology, University of Pennsylvania Medical Center, Philadelphia, 19104, USA. suttonm@mail.med.upenn.edu
Circulation
|April 2, 2003
まとめ
心臓再同期療法 (CRT) は,心不全患者の左心室のサイズを小さくし,排泄分数を改善することにより,心臓の機能を改善します. この治療は,逆転リフォームを促進し,全体的な心臓のパフォーマンスを向上させます.
科学分野:
- 心臓病学 心臓病学
- 心不全管理について
- 医療機器 医療機器について
背景:
- 心臓再同期療法 (CRT) は,中等度から重度の静脈性心不全の治療法として認められており,心室不同期を伴う.
- この研究は,CRTが左心室 (LV) の寸法と機能に与える影響を調査しています.
研究 の 目的:
- CRTがLVのサイズと機能を改善するかどうかを評価する.
- CRTとリバースLVリモデリングの関連性を評価する.
主な方法:
- MIRACLE試験の323人の患者は,出血および治療後の6ヶ月間,ドップラー心声検査を受けた.
- 患者は,CRT on (172) またはCRT off (151) グループにランダムに割り当てられました.
- 鍵となる測定は,LVの体積,エジェクション分数,LVの質量,およびミトラル反発でした.
主要な成果:
- CRTは,LVのエンド・ダイアストリックとエンド・シストリックの体積,LVの質量,およびミトラル反吐を著しく減少させました.
- 射出分数と心筋機能指数は,CRTで著しく改善しました.
- 改善は非発血性心不全の患者でより顕著でした.
結論:
- CRTは,最適の医療療法を受けている心不全患者の逆のLVリモデリングとシストリックおよびダイアストリック機能の改善と関連しています.
- CRTによって誘発されたLVリモジレーションは,症状の改善に寄与し,長期的な生存率を改善する可能性があります.
- CRTは,選択された心不全の患者にとって重要な治療上の利点を提供します.
さらに関連する動画
関連する概念動画
01:29Heart Failure II: Pathophysiology
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
01:22Heart Failure VI: Adjunct Therapies
Additional therapies for treating patients with heart failure (HF) may include procedural interventions, supplemental oxygen, the management of sleep disorders, and nutritional therapy.Procedural InterventionsImplantable Cardioverter-Defibrillator: For patients at risk of life-threatening arrhythmias due to severe left ventricular dysfunction, an Implantable Cardioverter-Defibrillator (ICD) can detect and terminate these arrhythmias, preventing sudden cardiac death and improving survival rates.
01:30Cardiomyopathy II: Dilated Cardiomyopathy
Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
01:29Cardiomyopathy IV: Restrictive Cardiomyopathy
Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
01:29Cardiomyopathy V: Interprofessional Care
Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...