Title :
Ultra-high-frequency ECG measurement
Author :
Jurak, P. ; Halamek, J. ; Leinveber, P. ; Vondra, V. ; Soukup, Ladislav ; Vesely, Petr ; Sumbera, Josef ; Zeman, Karel ; Martinakova, Libuse ; Jurakova, Tereza ; Novak, Martin
Author_Institution :
Inst. of Sci. Instrum., AS, Brno, Czech Republic
Abstract :
The aim of the present study is to introduce ultra-high-frequency and high-dynamic-range 12-lead ECG measurements using an electromagnetically shielded environment (Faraday cage) and a battery-powered ECG monitor with sampling of 25 kHz and 24-bit resolution. To demonstrate its diagnostic contribution we present the results of 14 subjects - 7 healthy volunteers and 7 ischemic patients during short 15-minute resting supine recordings. Both groups of subjects have the same width of the regular QRS complex with no ST-segment abnormalities. Wide-band power envelope analysis up to 1000 Hz was applied on each QRS complex region. Artifact-free QRS complexes from approximately 500 beats were averaged with the R-wave maximum from lead V2 as a trigger. The power envelopes consist of narrow and compact shapes in all leads in healthy young volunteers. In ischemic patients, there is a significant expansion and splitting of frequency components and differentiation in measured leads. In this study, we have shown the ability of ultra-high-frequency and high-dynamic-range ECG measurement to detect heart muscle pathology.
Keywords :
electrocardiography; medical disorders; medical signal processing; muscle; signal resolution; signal sampling; 24-bit resolution; Faraday cage; R-wave maximum; ST-segment abnormalities; artifact-free qrs complexes; battery-powered ECG monitor; electrocadiography; electromagnetically shielded environment; frequency 1000 Hz; frequency 25 kHz; heart muscle pathology; high-dynamic-range 12-lead ECG measurements; ischemic patients; lead V2; regular QRS complex; resting supine recordings; signal sampling; time 15 min; ultrahigh-frequency ECG measurement; wide-band power envelope analysis; Abstracts; Analysis of variance; Electric variables measurement; Myocardium; Optical sensors; Pathology;
Conference_Titel :
Computing in Cardiology Conference (CinC), 2013
Conference_Location :
Zaragoza
Print_ISBN :
978-1-4799-0884-4