相关实验视频
Updated: Aug 11, 2026

08:09
Transthoracic Echocardiography in Mice
Published on: May 28, 2010
概括
这项研究引入了一种新的非侵入性方法,通过胸壁运动来检测大动脉和肺关闭时间. 这种技术提供了比传统的心电图更准确的半月膜闭塞指示.
科学领域:
- 心血管生理学心血管生理学
- 生物医学工程 生物医学工程
- 诊断方法 诊断方法
背景情况:
- 大动脉和肺关闭的准确时间对于理解心脏功能至关重要.
- 传统的方法,如心声学,依赖于可听的振动,这可能不那么精确.
- 这些事件的非侵入性检测仍然是积极研究的领域.
研究的目的:
- 引入和验证一种检测大动脉和肺关闭时间的新方法.
- 评估这种新方法与传统心声图相比的有效性.
- 为了研究心脏机械事件向胸壁表面的传输.
主要方法:
- 使用运动传感器来检测与门关闭相关的微妙胸壁运动.
- 对六只开放胸部的狗进行了研究,以将传感器数据与大血管压力信号相关联.
- 对69名人类进行了非侵入性测量,以评估该方法的临床适用性.
主要成果:
- 在狗中,表心运动与大血管压力信号中的切口划痕相关,表明门关闭.
- 在人类中,这些明显的胸壁运动是非侵入性检测到的.
- 这种新方法在70%的人群中提供了显著更好的半月关闭时间指标,而不是心声学.
结论:
- 胸壁运动提供了一种可靠的,非侵入性的指标,用于确定大动脉和肺门关闭时间.
- 这种新方法在检测半月膜关闭的准确性方面超过了传统的心声学.
- 这些发现表明,非侵入性心血管诊断的潜在进展.
相关概念视频
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...
Assessment of the Cardiovascular System IV: Auscultation
Cardiac auscultation is a clinical skill used to assess heart function and detect abnormalities. It involves listening to heart sounds at specific anatomical locations through a stethoscope.
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
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Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
Abnormal Heart Sounds
Gallops:
Abnormal Heart Sounds
Gallops:
Imaging Studies for Cardiovascular System II:Types of Echocardiography
Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for diagnosing...
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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...

