概括
一种新的心声回声仪方法准确地测量了当传统心声回声仪失败时的缩时间间隔. 这种非侵入性技术为关键的心脏评估提供了可靠的替代方案.
科学领域:
- 心脏病学 心脏病学
- 医疗成像医学成像
- 生物医学工程 生物医学工程
背景情况:
- 声心电图和动脉脉可以带来技术记录的挑战.
- 精确确定心缩时间间隔是临床上具有意义的.
- 测量缩时间间隔的现有方法有时是不可靠的.
研究的目的:
- 评估大动脉回声心脏成像用于确定心缩时间间隔的疗效.
- 建立一个替代的非侵入性方法来测量缩时间间隔.
- 为了将心声回声学衍生的间隔与传统方法进行比较.
主要方法:
- 在52名患者中使用高速条形图谱记录大动脉回声心脏图.
- 计算出的喷射时间 (大动脉门的开放到关闭).
- 确定预喷射期 (Q波到大动脉关闭) 和预喷射期/喷射时间比.
主要成果:
- 在36名患者中获得了令人满意的心声回声仪记录.
- 在心声回声和传统方法之间观察到高相关性 (r > 0.97).
- 测量间隔的差异在统计学上是微不足道的,喷射时间最大差异为16毫秒.
结论:
- 大动脉回声心脏成像是一种可行的非侵入性替代方案,用于静脉缩时间间隔的确定.
- 当传统技术受到技术困难的阻碍时,这种方法特别有用.
- 心声图提供准确可靠的缩时间间隔数据.
更多相关视频
06:04Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
Published on: March 24, 2023
05:48Memorization-Based Training and Testing Paradigm for Robust Vocal Identity Recognition in Expressive Speech Using Event-Related Potentials Analysis
Published on: August 9, 2024
相关概念视频
Echo
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case, then the...
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case, then 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...
Sampling Continuous Time Signal
In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
In the...
