The QRS complex is the most prominent wave component within the electrocardiogram. It reflects the electrical activity of heart during the ventricular contraction and the time of its occurrence. Its morphology provides information about the current state of the heart. The identification of QRS-complexes forms the basis for almost all automated ECG analysis algorithms. The presented algorithm em...

BACKGROUND Cardiac resynchronization therapy (CRT) has been accepted as an established therapy for advanced systolic heart failure. Electrical and mechanical dyssynchrony are usually evaluated to increase the percentage of CRT responders. We postulated that QRS notch can increase mechanical LV dyssynchrony independently of other known predictors such as left ventricular ejection fraction and QR...

In clinical practice assessment of the mean QRS axis (MQRSA) provides information related either with hypertrophy of the ventricles or conduction blocks. The method adopted by clinicians i.e. the inspection of the QRS voltage in six of the limb leads has inherent element of subjectivity of approximately 10degrees. Moreover, in certain condition, when there is ambiguity about differentiation of ...

In this paper, a semi-automated multiscale algorithm based on rescaled continuous wavelet transform is presented in order to determine QT interval. According to our previous works, the relation between the duration of ECG waves and their wavelet transforms and dominant scales are used to determine QRS complex vicinity and to denoise ECG signal based on detected vicinity of QRS complex. Then, a ...

Electrocardiogram (ECG) is one of the most important parameters for heart activity monitoring. The main objective of digital signal processing of ECG signal is to deliver accurate, fast and reliable estimation of clinically important parameters such as the duration of the QRS complex, the R-R interval, the occurrence, amplitude and duration of the P, R, and T waves. In this paper, I have measur...

BACKGROUND The planar QRS-T angle can be easily obtained from standard 12-lead ECGs, but its predictive ability is not established. We sought to determine the predictive ability of the planar QRS-T angle in patients with nonischemic cardiomyopathy and to assess QRS-T angle behavior over time. METHODS AND RESULTS Baseline QRS-T angles from 455 patients in the Defibrillators in Nonischemic Card...