関連する実験動画
Updated: Jun 25, 2026

08:17
Murine Echocardiography of Left Atrium, Aorta, and Pulmonary Artery
Published on: February 20, 2017
慢性腎不全の小児患者における左心室質量とシストリックパフォーマンス
Mark M Mitsnefes1, Thomas R Kimball, Sandra A Witt
1Division of Nephrology and Hypertension, Cincinnati Children's Hospital Research Foundation, Cincinnati, Ohio, USA. mark.mitsnefes@CCHMC.org
Circulation
|February 20, 2003
まとめ
慢性腎臓病の子どもでは,左心室の質量と休息時の収縮性が増加しています. しかし,透析患者では,運動中に収縮準備力が低下し,将来の収縮機能不全を潜在的にシグナルします.
科学分野:
- ペディアトリック・カルディオロジー
- ネフロロジーはネフロロジーを用います.
- 心血管生理学 心血管の生理学
背景:
- 慢性腎疾患の子どもは,左心室縮症 (LVH) が発症することが多い.
- LVHは,小児慢性腎臓病における増加した後負荷と前負荷に対する適応的反応であると仮定されています.
- LVの質量,性能,収縮性を理解することは,これらの脆弱な患者において極めて重要です.
研究 の 目的:
- 左心室 (LV) 質量,LV性能,およびLV収縮性との関連性を評価する.
- 慢性腎不全 (CRI) の小児におけるこれらのパラメータと,慢性透析を受けている小児のパラメータを比較する.
- これらの小児の集団における運動中の収縮準備を評価する.
主な方法:
- 25人のCRI児,12人の慢性透析患者,24人の対照群における静止状態とピーク運動時の心拍評価.
- 周回線維縮短 (VCF) の縮短分数と心拍数修正速度を使用してLVパフォーマンスの評価.
- VCF,エンド・シストリック壁のストレス,運動反応に基づく収縮性および収縮性準備の決定.
主要な成果:
- CRI群と透析群の両方で,対照群と比較して,左心室質量指数 (LVM) が著しく高かった.
- 静止状態では,CRIと透析群は,下部壁のストレスでVCFと収縮性の増加を示した.
- 透析中の患者は,対照群と比較して,ピーク運動中に著しく低い収縮準備を示した.
結論:
- CRIと慢性透析を受けている子供には,高 LVM,LV性能,および休息時の収縮性があります.
- 運動中の透析患者における収縮性準備力の低下は,将来の静脈動脈機能不全を予測する可能性がある.
- これらの発見は,慢性腎疾患と小児の透析による心臓への影響を強調しています.
関連する概念動画
Imbalances in Cardiac Output
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
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 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...
Heart 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...
Heart Failure III: Clinical Manifestations
Heart failure (HF) manifests primarily as dyspnea, fatigue, and fluid retention, resulting in peripheral and pulmonary edema. Symptoms may vary depending on which ventricle is more affected, left or right.Left-Sided Heart FailureAlso known as left ventricular failure, this condition results from the left ventricle's inability to fill or eject sufficient blood into the systemic circulation. It leads to pulmonary congestion, which occurs when the left ventricle fails to eject blood effectively...
Cardiomyopathy 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,...

