IEEE J Biomed Health Inform - Toward continuous, noninvasive assessment of ventricular function and hemodynamics: wearable ballistocardiography.

Tópicos

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Resumo

Ballistocardiography, the measurement of the reaction forces of the body to cardiac ejection of blood, is one of the few techniques available for unobtrusively assessing the mechanical aspects of cardiovascular health outside clinical settings. Recently, multiple experimental studies involving healthy subjects and subjects with various cardiovascular diseases have demonstrated that the ballistocardiogram (BCG) signal can be used to trend cardiac output, contractility, and beat-by-beat ventricular function for arrhythmias. The majority of these studies has been performed with "fixed" BCG instrumentation-such as weighing scales or chairs-rather than wearable measurements. Enabling wearable, and thus continuous, recording of BCG signals would greatly expand the capabilities of the technique; however, BCG signals measured using wearable devices are morphologically dissimilar to measurements from "fixed" instruments, precluding the analysis and interpretation techniques from one domain to be applied to the other. In particular, the time intervals between the electrocardiogram (ECG) and BCG-namely, the R-J interval, a surrogate for measuring contractility changes-are significantly different for the accelerometer compared to a "fixed" BCG measurement. This paper addresses this need for quantitatively normalizing wearable BCG measurement to "fixed" measurements with a systematic experimental approach. With these methods, the same analysis and interpretation techniques developed over the past decade for "fixed" BCG measurement can be successfully translated to wearable measurements.

Resumo Limpo

ballistocardiographi measur reaction forc bodi cardiac eject blood one techniqu avail unobtrus assess mechan aspect cardiovascular health outsid clinic set recent multipl experiment studi involv healthi subject subject various cardiovascular diseas demonstr ballistocardiogram bcg signal can use trend cardiac output contractil beatbybeat ventricular function arrhythmia major studi perform fix bcg instrumentationsuch weigh scale chairsrath wearabl measur enabl wearabl thus continu record bcg signal great expand capabl techniqu howev bcg signal measur use wearabl devic morpholog dissimilar measur fix instrument preclud analysi interpret techniqu one domain appli particular time interv electrocardiogram ecg bcgname rj interv surrog measur contractil changesar signific differ acceleromet compar fix bcg measur paper address need quantit normal wearabl bcg measur fix measur systemat experiment approach method analysi interpret techniqu develop past decad fix bcg measur can success translat wearabl measur

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