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Forcecardiography: A Novel Technique to Measure Heart Mechanical Vibrations onto the Chest Wall.
Sensors ( IF 3.9 ) Pub Date : 2020-07-13 , DOI: 10.3390/s20143885
Emilio Andreozzi 1, 2 , Antonio Fratini 3 , Daniele Esposito 1, 2 , Ganesh Naik 4 , Caitlin Polley 5 , Gaetano D Gargiulo 4, 5 , Paolo Bifulco 1, 2
Affiliation  

This paper presents forcecardiography (FCG), a novel technique to measure local, cardiac-induced vibrations onto the chest wall. Since the 19th century, several techniques have been proposed to detect the mechanical vibrations caused by cardiovascular activity, the great part of which was abandoned due to the cumbersome instrumentation involved. The recent availability of unobtrusive sensors rejuvenated the research field with the most currently established technique being seismocardiography (SCG). SCG is performed by placing accelerometers onto the subject’s chest and provides information on major events of the cardiac cycle. The proposed FCG measures the cardiac-induced vibrations via force sensors placed onto the subject’s chest and provides signals with a richer informational content as compared to SCG. The two techniques were compared by analysing simultaneous recordings acquired by means of a force sensor, an accelerometer and an electrocardiograph (ECG). The force sensor and the accelerometer were rigidly fixed to each other and fastened onto the xiphoid process with a belt. The high-frequency (HF) components of FCG and SCG were highly comparable (r > 0.95) although lagged. The lag was estimated by cross-correlation and resulted in about tens of milliseconds. An additional, large, low-frequency (LF) component, associated with ventricular volume variations, was observed in FCG, while not being visible in SCG. The encouraging results of this feasibility study suggest that FCG is not only able to acquire similar information as SCG, but it also provides additional information on ventricular contraction. Further analyses are foreseen to confirm the advantages of FCG as a technique to improve the scope and significance of pervasive cardiac monitoring.

中文翻译:

心脏力描记术:一种测量心脏机械振动在胸壁上的新技术。

本文介绍了心动描记法(FCG),这是一种测量局部,心脏诱发的胸壁振动的新技术。自19世纪以来,已提出了多种技术来检测由心血管活动引起的机械振动,但由于涉及到繁琐的仪器,因此大部分已被放弃。非干扰性传感器的最新可用性使地震心动图(SCG)技术成为最活跃的研究技术。SCG通过将加速度计放在受试者的胸部上进行,并提供有关心动周期主要事件的信息。所提出的FCG通过放置在受试者胸部上的力传感器来测量由心脏引起的振动,并且与SCG相比,其提供的信号具有更丰富的信息含量。通过分析通过力传感器,加速度计和心电图仪(ECG)采集的同时记录来比较这两种技术。力传感器和加速度计牢固地固定在一起,并用皮带固定在剑突上。尽管滞后,但FCG和SCG的高频(HF)组件具有高度可比性(r> 0.95)。延迟是通过互相关来估计的,并导致大约数十毫秒。在FCG中观察到与心室容积变化相关的另外的大的低频(LF)分量,而在SCG中不可见。这项可行性研究令人鼓舞的结果表明,FCG不仅能够获得与SCG相似的信息,而且还能提供有关心室收缩的更多信息。
更新日期:2020-07-13
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