This paper is engaged in region of valid ECG signal processing, so the algorithm development of the QRS complex's assignation from twelve lead surface ECG record, design of measuring system in MATLAB soft ware and fi le processing of clinical dates. Th e algorithm makes use of standard mathematical methods and new method used for signal processing – wavelet transform. Created system is assessed on dates of patient, which are treated by biventricular pacing. Dates are provided by cardiological clinic of hospital IKEM in Prague. Th e QRS complex was successfully detect on ECG signals and located all important points for assessment width of the QRS complex. System evaluates with suffi cient accuracy width of QRS complex and can be exploited in practice.

• MeSH
• algoritmy MeSH
• elektrokardiografie metody   přístrojové vybavení   využití   MeSH
• hodnocení biomedicínských technologií metody   využití   MeSH
• kardiocentra zásobování a distribuce   MeSH
• kardiostimulace umělá metody   využití   MeSH
• komorové extrasystoly diagnóza   MeSH
• lidé MeSH
• matematické výpočty počítačové MeSH
• počítačové zpracování signálu přístrojové vybavení   MeSH
• Check Tag
• lidé MeSH

Diabetes mellitus (DM) has been known for many years to be associated with poor cardiovascular prognosis. Due to the sensitive neuropathy, the coronary artery disease in diabetic patients is frequently asymptomatic. Also twelve leads resting ECG can be within normal limits even in an advanced stage of coronary artery disease. Therefore in addition to the standard ECG other electrocardiographic procedures started to be studied in order to find some typical signs of myocardial damages caused by DM. Repeatedly reported results showed in DM patients without cardiovascular complications the tachycardia, shortening of the QRS and QT intervals, increase of the dispersion of QT interval, decreased amplitudes of depolarization waves, shortened activation time of ventricular myocardium and a flattening of T waves confirmed by the lower value of maximum and minimum in repolarization body surface isopotential maps. Most of these changes are even more pronounced in patients with cardiac autonomic neuropathy. Comparison with similar ECG changes in other diseases suggests that the electrocardiographic changes in DM patients are not specific and that they are particularly caused by an increased tone of the sympathetic nervous system what was indirectly confirmed by the heart rate variability findings in these patients.

• MeSH
• akční potenciály MeSH
• elektrokardiografie * MeSH
• komplikace diabetu diagnóza   etiologie   patofyziologie   MeSH
• lidé MeSH
• prediktivní hodnota testů MeSH
• srdce inervace   MeSH
• srdeční arytmie diagnóza   etiologie   patofyziologie   MeSH
• srdeční frekvence * MeSH
• sympatický nervový systém patofyziologie   MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• přehledy MeSH