Cardiac Arrhythmia is an anomaly in the Heart which can be diagnosed with the help of Electrocardiogram (ECG) signal. ECG signal is a diagrammatic representation of the cardiac signal, which is most important biomedical signal, taken for the feature extraction. Since it is very difficult to analyse the ECG signal due to the size, noise and changes in the signal, automatic system for ECG signal processing is essential. For this, ECG signal is processed using wavelets based signal processing, feature extraction and classification is done to identify the Cardiac activity in very sensible manner. The normal ECG signal consists of P wave which indicates atrial contraction, the QRS Complex indicates ventricular contraction and the T wave indicates
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The heart 's conducting system involves Sino-Atrial node (SA node) which is in the top of the chamber, Atrial-Ventricular node (AV node), located on the inter-atrial septum close to the tricuspid valve, the bundle of which is located in the proximal intra-ventricular septum. The bundle of the His branches, branches into the right anterior-superior, left anterior-superior and the left posterior-inferior bundle branches that run along inter ventricular septum. The atria and the ventricles are functionally linked only by the AV node and the conduction system. From the SA node the impulse spreads over the atrial muscles causing atrial contraction. These electrical impulse blowouts into the ventricles, causing the muscle to contract and to pump blood to the lungs and body. Since the SA node suddenly generates action potentials faster than other modules of the conduction system, nerve impulses from the SA node spread to the other areas and stimulate them so frequently they are not able to generate action potentials at their own inherent rates. Thus the faster SA node sets the rhythm for the rest of the heart. In Figure 1.3 the shaded interval gives the SA nodal impulse
The heart 's conducting system involves Sino-Atrial node (SA node) which is in the top of the chamber, Atrial-Ventricular node (AV node), located on the inter-atrial septum close to the tricuspid valve, the bundle of which is located in the proximal intra-ventricular septum. The bundle of the His branches, branches into the right anterior-superior, left anterior-superior and the left posterior-inferior bundle branches that run along inter ventricular septum. The atria and the ventricles are functionally linked only by the AV node and the conduction system. From the SA node the impulse spreads over the atrial muscles causing atrial contraction. These electrical impulse blowouts into the ventricles, causing the muscle to contract and to pump blood to the lungs and body. Since the SA node suddenly generates action potentials faster than other modules of the conduction system, nerve impulses from the SA node spread to the other areas and stimulate them so frequently they are not able to generate action potentials at their own inherent rates. Thus the faster SA node sets the rhythm for the rest of the heart. In Figure 1.3 the shaded interval gives the SA nodal impulse