Med Biol Eng Comput - Short and longer term repeatability of ballistocardiography in a sitting position with EMFi sensor.

Tópicos

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Resumo

Short and long-term alterations of ballistocardiographic parameters (BCG) were studied in a sitting position using Electromechanical Film (EMFi) sensors. Several physiological parameters were recorded from 48 men of middle age in consecutive recordings and after a 2-week interval. The duration and amplitudes of the signal components were studied. The repeatability index R, the Pearson correlation, and Bland-Altman (BA) repeatability methods were used to determine how repeatable the studied signals are. In consecutive and during 2 week recordings, the Pearson correlation rates for BCG systolic component values (from 0.88/0.83 (T(RJ)) to 0.97/0.78 (A(IJ)), PWV values for the left 0.97/0.67 and right ankle 0.98/0.76) were detected indicating excellent repeatability during consecutive recordings. Respectively BA T(RJ) was -0.002 ? 0.028/-0.004 ? 0.030. Corresponding R values were T(RJ) 0.90/0.82 and right ankle PWV 0.98/0.81. Quite modest blood pressure R values were obtained between 2 week recordings (systolic 0.63, diastolic 0.75, and heart rate 0.59). BCG and PWV measured with EMFi sensors are highly repeatable in consecutive recordings. In longer time interval recordings, BCG is influenced by hemodynamic instability, but in spite of this the reproducibility of the main parameters of the BCG and PWV were better than measured heart rate and blood pressure values.

Resumo Limpo

short longterm alter ballistocardiograph paramet bcg studi sit posit use electromechan film emfi sensor sever physiolog paramet record men middl age consecut record week interv durat amplitud signal compon studi repeat index r pearson correl blandaltman ba repeat method use determin repeat studi signal consecut week record pearson correl rate bcg systol compon valu trj aij pwv valu left right ankl detect indic excel repeat consecut record respect ba trj correspond r valu trj right ankl pwv quit modest blood pressur r valu obtain week record systol diastol heart rate bcg pwv measur emfi sensor high repeat consecut record longer time interv record bcg influenc hemodynam instabl spite reproduc main paramet bcg pwv better measur heart rate blood pressur valu

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