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Changes in P wave duration (PWD) following atrial fibrillation (AF) ablation have been described and may have diagnostic value. PWD is usually assessed manually from ECG. This study aimed at exploring a novel method for automated modeling of the P-wave and assessment of PWD. Moreover, it aimed at investigating the effect of hybrid procedure (HP) for AF treatment on PWD. P-wave modeling is achieved...
Baseline drift has a major impact on the preprocessing and feature extraction of the ECG signal. This paper analyzes the characteristics of baseline drift of Holter ECG signals. A novel method based on mathematical morphology combined with adaptive filter is proposed to eliminate the baseline drift in Holter ECG. The method uses morphological method to remove high frequency noise and extract the baseline...
It has been proposed that triangulation on the cardiac action potential manifests as a broadened, more flat and notched T-wave on the ECG but to what extent such morphology characteristics are indicative of triangulation is more unclear. In this paper, we have analyzed the morphological changes of the action potential under the effect of the IKr blocker sertindole and associated these changes to concurrent...
ECG and pulse waveforms are important physiological parameters that can be utilized to analyze noninvasively physical condition and monitor cardiovascular diseases. In recent years, they were studied for evaluating the effects of exercise on human body. However, the systematical analysis on the changes of ECG and pulse waveforms before and after exercise has not been found. This study examines the...
This paper presents a person identification mechanism in irregular cardiac conditions using ECG signals. A total of 30 subjects were used in the study from three different public ECG databases containing various abnormal heart conditions from the Paroxysmal Atrial Fibrillation Predicition Challenge database (AFPDB), MIT-BIH Supraventricular Ar-rthymia database (SVDB) and T-Wave Alternans Challenge...
Drugs that prolong the QTc interval to clinically relevant magnitudes are likely to be proarrhythmic if they also produce relevant changes in the morphology of repolarization waveforms. Concurrent analyses of QTc and the T-wave Morphology Combination Score (MCS) have already shown how this approach can improve characterization of repolarization effects for a number of drugs. In this study we develop...
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