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Non-invasive measuring and coherence analysis of systolic force and heart rhythm

Hardware-software complex for registration and analysis of systolic force and heart rate variability, including sophisticated analysis of parameters for early health state evaluation.

This project deals with the quantitative measuring of systolic force and the analysis of heart rhythm coherence through the use of quantitative ballistocardiography and three-axial accelerometric measurements on the thorax of an examinant. The use of quantitative ballistocardiography makes it possible to set up the characteristic as follows: the systolic force (F) and the minute cardiac force (MF) are related to the body mass of each examinant so as to obtain comparable values. When examining using quantitative ballistocardiography (Q-BCG), the pick up device directly entraps the signals according to the cardiovascular activity without the need to apply adhesive or tong-electrodes to the body of the patient, and connecting him by cables to an apparatus. A non-invasive method must be developed. Moreover, the properties of Q-BCG allow any eventual shape-, phase-, and time-related deformation of the curves to be recorded. Whereas the impulses are recorded exactly action-timed, a new field is about to open for the use of Q-BCG for recording heart rate as well as assessing the variability of the heart rhythm. In terms of practical use, a new telemetric system will be created that allows data to be acquired and assessed using quantitative ballistography (Q-BCG). Three-axial accelerometric measurements on the thorax of a patient will be transmitted. The new system is composed of three hardware (HW) modules that are telemetrically interconnected with the option of interconnecting thorough a metallic line. These are the ballistographic, the accelerometric modules and a module for data transfer interconnected with the PC thorough Universal Serial Bus (USB) interface. Sensing mechanical body reactions, which are induced in response to the cardiovascular dynamics, is provided by the ballistocardiographic module, which reads the strain coming from the mechanical deformation of the pieso-electric plate. This sensing module is mounted on a special device, which works by transmitting the mechanical body reaction onto the pieso-electric recorder. The accelerometric module is applied for measuring thorax acceleration as induced by movements from the heart's activity. This measurement is made on three basic orthogonal axes. The core of the module is the sensing device composed of the two biaxial monolithic semiconductor accelerometers. The data transfer module is designed to transmit the data from the radio module into the PC through the USB interface. Because of the transfer speeds of modules applied, it is possible to obtain good data transmission on the radio network set up (an acceptable sampling rate and also the necessary overhead costs of switching over the data transfer modes), and since they can be applied as approved for operation within frequency bands 151 - 173, 434, 868 - 870, and 902 - 920 MHz (ensured through the functional and pin related serial compatibility), they can be legally operated in different European countries and the U.S.A., should a co-operative foreign work station be acquired. The aim of the project is to monitor the heart rate and carry out an analysis of heart rhythm variability. The latter includes statistical and autocorrelation analysis, spectral analysis, assessment of the aggregated effect of the regulation of autonomous functions of vegetative homeostasis, activity of the vasomotor centre, activities of the sympathetic cardiovascular centre and the stress index. In conclusion, the specifity and reliability of the above methods will be related to the current monitoring of persons during conventional working activities. This absolutely non-invasive method can be used to monitor operators both on the ground and in flight conditions. In addition to other applications, the method can be used for the continuous monitoring of examinants to prevent diseases, to determine breaks during the working process, and to estimate the potential capabilities for performing duties (monitoring the load, fatigue, inadvertence etc.). Keywords: health, heart, aviation.
Acronym: 
Q-EUROCARDIO-T
Project ID: 
3 031
Start date: 
01-03-2003
Project Duration: 
36months
Project costs: 
350 000.00€
Technological Area: 
Measurement Tools
Market Area: 

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.