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Using ballistocardiography to measure cardiac performance: a brief review of its history and future significance.
Clin Physiol Funct Imaging
November 2012
Faculty of Kinesiology and Health Studies, University of Regina, Regina, SK, Canada.
Ballistocardiography (BCG) is a non-invasive technology that has been used to record ultra-low-frequency vibrations of the heart allowing for the measurement of cardiac cycle events including timing and amplitudes of contraction. Recent developments in BCG have made this technology simple to use, as well as time- and cost-efficient in comparison with other more complicated and invasive techniques used to evaluate cardiac performance. Recent technological advances are considerably greater since the advent of microprocessors and laptop computers.
View Article and Find Full Text PDFInfrasonic cardiac signals: complementary windows to cardiovascular dynamics.
Annu Int Conf IEEE Eng Med Biol Soc
July 2012
Centre for Integrative Bioengineering Research, School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada V5A 1S6.
New approaches to fairly old noninvasive cardiology tools, based on studying low frequency vibrations created by the heart on the body, were reviewed. These signals were divided and studied in two categories and compared in their capability for estimation of hemodynamic parameters. In particular one representative signal of each category, seismocardiogram and ultra-low frequency ballistocardiogram, were selected and compared to each other in their correspondence to physiological events behind their waves.
View Article and Find Full Text PDFComparative analysis of seismocardiogram waves with the ultra-low frequency ballistocardiogram.
Annu Int Conf IEEE Eng Med Biol Soc
March 2010
Centre for Integrative Bioengineering Research (CiBER), School of Engineering Science, Simon Fraser University, Burnaby, BC V5A1S6, Canada.
Simultaneous seismocardiogram (SCG) and ultra-low frequency ballistocardiogram (BCG) signals are recorded. Preliminary results from the BCG helped tag which waves on the SCG are related to the rapid systolic ejection and aortic valve closure events. These results agreed with and further confirmed previous findings using the echocardiogram.
View Article and Find Full Text PDFA simple ballistocardiographic measure (IJ/HI amplitude ratio) in relation to electrocardiographic evidence of ischaemic heart disease.
Scand J Clin Lab Invest
September 1979
A series of eighteen monozygotic and thirteen dizygotic twin pairs originally selected in 19=7--1968 because of the presence of symptoms of ischemic heart disease in at least one of the pair members was subjected to after examination including ultra-low frequency ballistocardiography. The ratio between IJ and HI amplitudes in the ballistocardiogram was used as an index of myocardial mechanical function. The IJ/HI ratio had a repeatability coefficient of 0.
View Article and Find Full Text PDFBimonthly recordings of ultra-low-frequency acceleration ballistocardiograms overa 2 to 7 year period in 73 patients with ischemic heart disease and 50 matched control subjects within the framework of a clinical follow-up were subjected to measurement of IJ amplitude (reflecting force of contraction), IJ velocity (reflecting contractility), and IJ velocity variation coefficient. These repeated measurements were correlated with 24-hour vanillylmandelic acid (VMA) excretion in the urine, arthythemia incidence, heart rate, and clinical outcome in each subject. Moth-to-month variability of the IJ velocity was highly significantly correlated with 24-hour VMA excretionas well as with the likelihood of subsequent myocardial infartion or sudden death.
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