慢性性静脈性心不全におけるアウトカムに対する右心室射出分子の影響
Philippe Meyer1, Gerasimos S Filippatos, Mustafa I Ahmed
1Montreal Heart Institute, Montreal, Quebec, Canada.
Circulation
|January 6, 2010
まとめ
20%未満の右心室射出分数 (RVEF) は,静脈性心不全の患者の死亡率と心不全の入院を有意に予測します. この発見は,心不全管理における重要な予後指標としてのRVEFを強調しています.
科学分野:
- 心臓病学 心臓病学
- 心不全に関する研究
- クリニカルアウトカム
背景:
- 心不全における右心室射出分数 (RVEF) に関する以前の研究は,小さなサンプルサイズと短いフォローアップ期間によって制限されていました.
- HFにおけるRVEFの予後的意義は,特に左心室機能不全と併用して,さらなる調査を必要とします.
研究 の 目的:
- ベースラインのRVEFがHFと左心房エジェクション分子が低下した患者の大群の臨床結果に与える影響を調査する.
- この患者集団において,RVEFが死亡率と入院率の独立した予測因子であるかどうかを判断する.
主な方法:
- ベータ・ブロッカーによる生存評価試験 (BEST) の2008年参加者の分析で,左心室排泄分数は35%以下であった.
- RVEFは,ゲート均衡放射性核素室内写真を用いて評価され,以下の4つのグループに分類されました: ≥40%, 30-39%, 20-29%, <20%.
- すべての原因による死亡率,心血管疾患による死亡率,HF死亡率,突然心臓死,すべての原因による入院,およびHF入院を含むアウトカムが,平均24ヶ月のフォローアップ期間で評価されました.
主要な成果:
- 調整されていない死亡率は,RVEFの減少とともに徐々に増加し,RVEF ≥40%のグループでは27%からRVEF <20%のグループでは47%まで上昇した.
- 多変量調整した分析では,RVEF <20%は,独立して全因死亡率の増加と関連していたことが明らかになった (HR 1.32;P=0.034).
- 心血管死亡率 (HR 1.33; P=0.041),HF死亡率 (HR 1.61; P=0.037) およびHF入院 (HR 1.39; P=0.007) に関する調整されたリスクは,RVEF <20%の患者で,RVEF ≥40%の患者と比較して,著しく高かった.
結論:
- ベースラインのRVEF <20%は,心筋梗塞性心不全患者の死亡率の有意な独立した予測因子です.
- 減少したRVEF,特に<20%は,心不全の入院の強い予測要因でもある.
- これらの発見は,リスクの階層化と管理のために,心不全患者のRVEFの評価の重要性を強調しています.
さらに関連する動画
04:20Integration of Brain Tissue Saturation Monitoring in Cardiopulmonary Exercise Testing in Patients with Heart Failure
Published on: October 1, 2019
5.1K
08:19Transthoracic Echocardiography to Assess Post-Resuscitation Left Ventricular Dysfunction After Acute Myocardial Infarction and Cardiac Arrest in Pigs
Published on: July 12, 2022
3.3K
関連する概念動画
Pathophysiology of Cardiac Performance
2.2K
Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
2.2K
Imbalances in Cardiac Output
3.3K
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...
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...
3.3K
Mitral Regurgitation I: Introduction
1.3K
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...
1.3K
Mitral Stenosis I: Introduction
1.8K
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...
1.8K
Heart Failure I: Introduction
2.1K
Heart failure refers to a clinical syndrome caused by structural or functional cardiac disorders that prevent the heart from pumping an adequate amount of blood to meet the body's metabolic needs. This condition often arises from myocardial infarction or ischemia, leading to decreased cardiac output, reduced tissue perfusion, impaired gas exchange, fluid volume imbalance, and decreased functional ability.Heart failure can result from disruptions in the mechanisms that regulate cardiac output...
2.1K
Heart Failure II: Pathophysiology
2.3K
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...
2.3K
