OBJECTIVE The P-QRS-T wave on surface electrocardiogram (ECG) reflects the changes in atrial and ventricular electrical properties. However, the atrioventricular conduction system potentials cannot be recorded to date. This study aimed to explore the possibility of micropotential of the atrioventricular conduction system recorded by surface "SAN-Atrial-AVN-His (Saah) ECG." METHODS We randomiz...

Rationale: The term “fragmentation of the QRS complex” denotes existence high-frequency potentials (spikes) in QRS-complex. It is either a marker for cardiac structural diseases inducing biventricular hypertrophy or any condition interfering with normally homogeneous depolarization status inside myocardium. An associated right ventricular infarction inferior maybe carry risk impact and serious ...

tachycardias. When unsure of the type of tachycardia, it is wise not to use verapamil. Intravenous amiodarone or procainamide can be used. When a broad-QRS tachycardia shows RBBB-type of morphology in lead V1, a monophasic or biphasic complex in V1 and R/S <1 in V6, suggests VT. A triphasic complex in leads V1 and V6 suggests SVT. On the other hand, when lead V1 shows LBBB-type of morphology; a...

electrocardiographic (ecg) parameters and cardiac rhythms have been evaluated and published in different breeds of beef and dairy cattle but there is limited information regarding these parameters in healthy sheep. this study is aimed to investigate the ecg parameters in balouchi sheep. the ecg parameters including the amplitudes of p, q, r, s and t waves, duration of p, qrs and t waves and p-r...

An electronic circuit capable of integrating the electrocardiogram is described. The net areas of the QRS complex, the T wave and of the entire ventricular complex, QRS-T, in the standard leads may be estimated by measurement of the length of two vertical lines in each of the integrated records. The manifest areas of QRS, T and the gradient (QRS-T) with the orientation of these vectors are easi...

In this study, a new long-duration holter electrocardiogram (ECG) major events detection-delineation algorithm is described which operates based on the false-alarm error bounded segmentation of a decision statistic with simple mathematical origin. To meet this end, first three-lead holter data is pre-processed by implementation of an appropriate bandpass finite-duration impulse response (FIR) f...