大动脉弹功能的相互关系,心血管疾病风险因素和左心室扩张功能:弗雷明汉心脏研究
Leroy L Cooper1, Brenton R Prescott2, Vanessa Xanthakis2,3,4
1Biology Department, Vassar College, Poughkeepsie, NY.
medRxiv : the preprint server for health sciences
|July 9, 2025
概括
通过心房平面位移 (AVPD) 测量系统性大动脉延伸,对于健康的左心室扩张功能至关重要. 这种关系受到年龄,性别和肥胖等因素的影响.
科学领域:
- 心血管生理学心血管生理学
- 心声回声图 (Echocardiography) 是一种心声回声图.
- 生物医学工程 生物医学工程
背景情况:
- 大动脉在腹痛期间的弹性反弹对于左心室的填充至关重要.
- 大动脉弹性受损可能有助于扩张性功能障碍.
- 心血管风险因素,大动脉拉伸和腹筋功能之间的相互作用需要研究.
研究的目的:
- 检查心血管疾病风险因素与心静脉心房平面移位 (AVPD) 之间的横截面和纵向关联.
- 评估AVPD之间的关系,这是对上升大动脉伸展的测量,以及左心室透静功能.
- 探索风险因素如何改变这些关联.
主要方法:
- 在Framingham心脏研究的7117名参与者中,利用心声学在两次检查中 (14年间隔).
- 通过组织多普勒波的积分测量了缩AVPD.
- 评估左心室扩张功能,使用中枢环状速度 (e'和E/e').
主要成果:
- 较高的AVPD与改善的扩张功能相关 (较高的e',较低的E/e') 截面.
- 随着时间的推移,AVPD的较大增加与更好的纵向透静功能有关.
- 关联因年龄,性别,肥胖,高血压治疗和大动脉硬性 (脉冲波速度) 而改变.
结论:
- 大动脉弹功能,以AVPD表示,对于维持左心室透静功能很重要.
- 这一功能受到大动脉硬,肥胖,年龄和性别的显著影响.
- 这些发现突出了大动脉力学在扩张性健康和疾病中的作用.
相关概念视频
01:22Aortic Regurgitation II: Clinical Features and Diagnostic Tests
59
Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
59
01:25Aortic Regurgitation III: Medical Management
51
Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
51
01:29Heart Failure II: Pathophysiology
51
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...
51
01:15Aortic Regurgitation I: Introduction
45
IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...
45
01:20Mitral Regurgitation I: Introduction
61
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...
61
01:16Heart Valves
5.9K
The human heart is a complex organ with an intricate system of valves that regulate blood flow. There are two main types of valves: atrioventricular (AV) valves and semilunar valves.
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
5.9K