相关实验视频
Updated: Jul 18, 2026

12:10
Semi-automated Optical Heartbeat Analysis of Small Hearts
Published on: September 16, 2009
概括
心声学可靠地显示了 mitra 门的打开和关闭,与血液动力学测量密切相关. 这种非侵入性技术准确地确定了患者的关键缩和透缩时间间隔.
科学领域:
- 心脏病学 心脏病学
- 医疗成像医学成像
- 生理学 生理学 生理学
背景情况:
- 准确评估心肌功能对于诊断和管理心脏病的关键.
- 心声谱是一种广泛使用的非侵入性成像技术,用于评估心脏结构和功能.
- 同时记录心声回声和血液动力学数据,可以准确地对门事件进行相关联.
研究的目的:
- 评估前侧叶片回声心脏成像在确定中枢的打开和关闭时的可靠性.
- 为了将二心事件的回声心脏学标记与同时进行心内压力测量进行比较.
- 评估使用心声回声学对心缩和心缩时间间隔的非侵入性确定.
主要方法:
- 同时记录前侧叶片回声心脏图 (ECHO) 与心内压力,大动脉第二声和心电图.
- 在接受心脏导管治疗的14名患者中,有38条记录.
- 通过压力交叉点和缩的开始定义了血液动力学开放/关闭;心声图标记是D' (开放) 和Co (关闭).
主要成果:
- 有意义的回归方程显示了异体体松期 (IRPE = 0.97*IRPH + 30,r=0.89),Q到闭合间隔 (QCIE = 0.68*QCIH + 37,r=0.71) 和透静填充期 (DFPE = 0.98*DFPH + 10,r=0.98) 的回声心脏学和血液动力学测量之间的高相关性.
- 血液动力学标记系统地先于心声回声学标记.
- 透析填充周期几乎相同 (在10毫秒内).
结论:
- 前传单回声心脏图是人类血液动力学中膜开放和关闭的可靠指标.
- 心声谱提供了一种有用的非侵入性方法,用于确定关键的缩和放缩时间间隔.
- 这证实了心声回声作为评估中枢动力学和时间的可靠工具.
相关概念视频
Anatomy of the Heart
The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.
Pulse
The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls between...
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls between...
Chambers of the Heart
The human heart is a complex organ made up of four chambers: the right and left atria and the right and left ventricles. These internal chambers are separated by partitions known as the interatrial and interventricular septa. The exterior of the heart features a groove known as the coronary sulcus that demarcates the atria from the ventricles, while the anterior and posterior interventricular sulci distinguish between the two ventricles.
Deoxygenated blood from the body is received in the right...
Deoxygenated blood from the body is received in the right...
Heart Valves
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...
Conduction System of the Heart
Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
Heart Sounds
Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V) valves at the...
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V) valves at the...

