ミトラル狭窄症の患者の肺循環におけるエンドセリンの生成
1Department of Cardiology, Jichi Medical School, Tochigi, Japan.
Circulation
|May 1, 1994
まとめ
ミトラル狭窄症の患者では,肺循環におけるエンドセリン-1の産生が増加し,肺動脈の圧力の上昇と相関する. この増加したエンドセリン-1は,この状態では肺血管トーンと直接関連していません.
科学分野:
- 心臓病学 心臓病学
- 肺高血圧の研究について
- 血管生物学 血管生物学
背景:
- プラズマエンドセリンの濃度は,肺高血圧で上昇します.
- 肺循環におけるエンドセリン生成の特定の部位は不明である.
- この研究では,関節狭窄症の患者におけるエンドセリンの産生を調査しています.
研究 の 目的:
- ミトラル狭窄症患者の肺循環内のエンドセリン生産部位を決定する.
- 肺血管トーンに対するエンドセリン生成の影響を評価する.
主な方法:
- 血のエンドセリン-1,アンジオテンシンII,およびトロンボモジュリン濃度が測定されました.
- 10人のミトラ狭窄患者の右心房と左心房から採取した血液サンプル.
- 血動力学的パラメータと相関するエンドセリン-1レベル.
主要な成果:
- 右心房と比較して,左心房でendothelin-1のレベルが著しく高かった (P < .001).
- 左心房内ソテリン-1の増加は,肺動脈の平均圧,肺動脈の圧,および肺全体の抵抗と相関する.
- アトリア間では,アンジオテンシンIIまたはトロンボモジュリン濃度の有意な差異は観察されなかった.
結論:
- エンドセリン-1の産生は,ミトラル狭窄症患者の肺循環で上昇しています.
- この増加は,肺動脈の圧力の上昇と関連しています.
- この患者群では,エンドセリン-1の産生は肺血管トーンと直接関係ありません.
関連する概念動画
01:05Breathing
The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...
01:28The Inner Mitochondrial Membrane
The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria. In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
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...
01:21Myocarditis I: Introduction
Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
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...