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1

Hybrid system of ECG signal acquisition and QRS complexes detection for special medical devices synchronization

Komorowski D., Malcher A., Pietraszek S.

Journal of Medical Informatics & Technologies

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2013

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Vol. 22

227--234

EN

Some medical devices such as mechanical circulatory support systems and defibrillators require synchronization with the appropriate phase of the cardiac cycle of the patient. This paper presents a description of the electrocardiographic (ECG) signal amplifier and QRS detector designed for use with such devices. The detector system was built using a programmable analog array AN231E04 and the ECG amplifier with an analog-digital (A/D) converter based on a programmable circuit (front-end) ADS129x. By using the programmable elements and exploiting the potential of dynamic analog matrix reconfiguration, the presented detector achieved the desired features, such as low latency of QRS detection, automatic gain control and the ability to change the time constant by software. High-resolution of the A/D converter in the ADS1298x and the possibility of programming the gain of the amplifier allow the acquisition of the ECG signal acquired from different types of electrodes: disposable standard, epicardial or endocavitary. The tests of the prototype system proved that it is highly effective for the detection of QRS complexes in ECG waveforms recorded from all kinds of electrodes.

2

Elektroterapia w resuscytacji - wytyczne

Kmiotczyk W.

Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna

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2009

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Vol. 15, nr 3

248-249

PL

W świetle medycyny opartej na dowodach (EBM) niewiele jest działań o tak potwierdzonej skuteczności przywracania do życia, jak dobrej jakości nieprzerywane uciski klatki piersiowej i defibrylacja w rytmach "do defibrylacji", czyli migotaniu komór [VF) i częstoskurczu komorowym bez tętna (VT). W niektórych badaniach szanse pacjenta sięgały nawet 70%. Ustalenia ostatnich lat pozwalają mieć nadzieję na dalsze, czasem niezwykle spektakularne sukcesy, zawdzięczane elektroterapii.

3

Aktualne rozwiązania w zakresie defibrylacji kardiowersji

Wieczorski M., Stodółkiewicz E.

Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna

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2009

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Vol. 15, nr 3

253-257

PL

Defibrylacja jest jedną z kluczowych interwencji o ustalonej skuteczności po zatrzymaniu krążenia w mechanizmie migotania/ trzepotania komór. Celem niniejszej pracy jest przedstawienie historii wprowadzania defibrylacji do praktyki klinicznej technicznych aspektów związanych z defibrylacją, jak również praktycznego użycia defibrylatorów, zgodnie z wytycznymi Europejskiej Rady Resuscytacji (ERC) 2005.

4

New generation impedance rheographs and examples of their clinical applications

Pałko T.

Biocybernetics and Biomedical Engineering

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2007

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Vol. 27, no. 1-2

185-196

EN

The impedance rheography as a method of measurement and recording of electrical impedance and its changes in a body segment is widely used in research and medical practice. Several types, single or multichannel, analog or digital impedance rheographs were developed at Warsaw University of Technology. A digital impedance rheograph has been recently designed for measurement of impedance modulus (...) and its changes (...) of body segment or tissue sequent simultaneously with ECG signal. The designed rheographs were positively tested technically and clinically. In this article is presented the clinical application of impedance rheography for study of systemic and pulmonary blood flow in two different groups of patients with several cardiac abnormalities or after therapeutic procedures. The investigation of systemic blood circulation was done on group of 20 patients with cardiac arrhythmia (15 cardioverted and 5 cardiostimulated patients). The pulmonary blood circulation was studied on 20 healthy and 26 patients: 8 with isolated pulmonary stenosis and 18 with Fallot syndrome. The findings show that impedance method allows to detect and assess these abnormalities.