相关实验视频
Updated: May 10, 2026
09:45
An Isolated Working Heart System for Large Animal Models
Published on: June 11, 2014
30.7K
运动员的心脏:发表论文的全度考虑以及与心血管变量之间的关系
Casper Sejersen1,2, Stefanos Volianitis3, Niels H Secher4
1Department of Anaesthesia, Department of Clinical Medicine, University of Copenhagen, Rigshospitalet 2043, Blegdamsvej 9, DK-2100, Copenhagen Ø, Denmark. Sejersen_@hotmail.com.
European journal of applied physiology
|March 11, 2024
概括
与未经训练的人相比,运动员的心脏显示左心室内部直径 (LVIDd) 和壁厚度 (WT) 的扩大. LVIDd与心血管功能相关,而WT对于维持耐力运动员血压至关重要.
科学领域:
- 心血管生理学心血管生理学
- 运动医学 运动医学
- 运动科学 运动科学
背景情况:
- 这是一个很棒的节目,这是一个很棒的节目.
- 运动员的心脏.
- 是指心脏适应于定期体育训练的反应.
- 了解这些适应是区分生理变化和病理状况的关键.
研究的目的:
- 研究左心室 (LV) 形态 (墙壁厚度[WT]和末端透气内部直径[LVIDd]) 与各种运动学科中的心血管反应之间的关系.
- 为了在不同运动员组和未经训练的对照组中比较心脏尺寸和功能变量,按体重进行缩放.
主要方法:
- 对滑雪运动员,划船运动员,游泳运动员,骑自行车运动员,跑步运动员和举重运动员的出版物的系统审查和元分析.
- 对LV维度 (WT,LVIDd) 和对体重的功能变量进行全度量缩放,用于组间比较.
- 在LV尺寸和心血管参数 (中风体积,最大氧气吸收,心脏输出等) 之间的相关性分析. ) 的情况.
主要成果:
- 与对照组相比,所有运动员组都表现出扩大的LV WT (9% -24%).
- 与对照人群相比,耐力运动员 (滑雪者,划船者,游泳者,骑自行车者,跑步者) 的LVIDd显著更大 (7%-15%),但不是举重运动员.
- LVIDd显示了与中风体积,氧脉冲,最大氧吸收,心脏输出和血液体积 (r ≈ 0.9,P < 0.05) 的强烈正相关性.
结论:
- 心脏扩大,特别是增加LVIDd,对于产生耐力运动所需的中风体积和心脏输出至关重要.
- 扩大的LV WT对于在扩大的LVIDd的情况下保持正常动脉压力所需的壁面张力发展至关重要.
- 这些发现突出了运动员心脏的独特形态和功能适应,具体取决于运动的类型.
相关概念视频
01:30Factors Influencing Heart Rate
The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
01:29Pathophysiology of Cardiac Performance
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...
01:31Regulation of Heart Rates
The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
01:17Exercise and Cardiac Output
Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be met...
Sustained exercise increases the muscles' oxygen demand, which can be met...
01:20Exercise and Cardiovascular Response
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
01:19Cardiac Output I:Effect of Heart Rate on Cardiac Output
Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart rate...
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart rate...