Author/Editor		Štajer, D; Gorup, Ž; Rode, P; Gorup, S; Noč, M
Title		A computer based system for prediction of life threatening cardiac arrhythmias
Type		članek
Source		In: Hamza MH, ed. Modelling, identification and control. 9th IASTED international symposium: proceedings. Innsbruck: IASTED,
Publication year		1990
Volume		str. 93-6
Language		eng
Abstract		In patients suffering from acute myocardial infarction potentially lethal cardiac arrhythimias ca be predicted using high gain signal averaged electrocardiography (SAECG). The diagnostic method which is being developed shall probably contribute to early therapeutic procedures by detection of endangered patients. Signal for SAECG is derived from patients using three bipolar orthogonal precordial leads. It is fed to a three channel low noise instrumentation amplifier (A=1000, frequency range 50-150 Hz). The signal is converted into digital form by a 12-bit custom designed A/D PC converter card. The conversion rate of 10 kHz is sufficient for detection of high frequency delayed myocardial depolarization signals as well as for further elaboration of SAECG recording. An external hardware trigger unit is used for starting conversion at proper times. The trigger module also preforms exclusion of noisy signals and of those, originating from pathologic heart beats (extrasystoles). The software applied performs averaging up to 512 ms in duration. A data base formed from each recording enables further signal processing, analysis of individual patient's control SAECG's, and determination of criteria for prediction of arrhythmia.
Descriptors		ARRHYTHMIA ELECTROCARDIOGRAPHY COMPUTERS ANALOG-DIGITAL CONVERSION MYOCARDIAL INFARCTION SIGNAL PROCESSING, COMPUTER-ASSISSTED