Intervals in electrocardiogram

Part 1 of ebook "Electrocardiography in veterinary medicine" presents the following content: cardiac evaluation approaches; electrocardiography - its uses and limitations; generation and shape of electrocardiogram; a systematic reading of an electrocardiogram; benchmarks for normal electrocardiogram; abnormal wave forms, segments, and intervals in electrocardiogram; atrial and ventricular enlargement patterns and clinical associations;...

162p dieptieuung 14-07-2023 7 1   Download

Approximate entropy (ApEn) is a widely imposed metric to evaluate a chaotic response and irregularities of RR-intervals from an electrocardiogram. Yet, the technique is problematic due to the accurate choice of the tolerance (r) and embedding dimension (M).

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Approximate Entropy (ApEn) is a widely enforced metric to evaluate the chaotic response and irregularities of RR intervals from an electrocardiogram. We applied the metric to estimate these responses in subjects with type 1 diabetes mellitus (DM1).

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The electrocardiogram (ECG), introduced into clinical practice more than 100 years ago by Einthoven, constitutes a lineal recording of the heart’s electrical activity that occurs successively over time. An atrial depolarisation wave (P wave), a ventricular depolarisation wave (QRS complex) and a ventricular repolarisation wave (T wave) are successively recorded for each cardiac cycle (Figures 1A–C). As these different waves are recorded from different sites (leads) the morphology varies (Figure 2).Nevertheless, the sequence is always P–QRS–T.

180p ozon_ozon 02-05-2012 96 14   Download