Toward Continuous, Noninvasive Assessment of Ventricular Function and Hemodynamics: Wearable Ballistocardiography

Andrew D. Wiens, Mozziyar Etemadi, Shuvo Roy, Liviu Klein, Omer T. Inan

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number6907954
Pages (from-to)1435-1442
Number of pages8
JournalIEEE Journal of Biomedical and Health Informatics
Volume19
Issue number4
DOIs
StatePublished - Jul 1 2015

Keywords

  • Wearable health technology
  • accelerometer
  • ballistocardiogram
  • home health monitoring

ASJC Scopus subject areas

  • Biotechnology
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Health Information Management

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