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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Using Intracardiac Vectorcardiographic Loop for Surface ECG Synthesis | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 410630 8 pages doi 10.1155 2008 410630 Research Article Using Intracardiac Vectorcardiographic Loop for Surface ECG Synthesis A. Kachenoura 1 2 F. Poree 1 2 A. I. Hernandez 1 2 and G. Carrault1 2 1 Institut national de la santé et de la recherche médicale INSERM U642 Rennes 35000 France 2 Universite de Rennes 1 Laboratoire Traitement du Signal et de l Image LTSI Rennes 35000 France Correspondence should be addressed to F. Poree fabienne.poree@univ-rennes1.fr Received 14 December 2007 Accepted 7 July 2008 Recommended by Qi Tian Current cardiac implantable devices offer improved processing power and recording capabilities. Some of these devices already provide basic telemonitoring features that may help to reduce health care expenditure. A challenge is posed in particular for the telemonitoring of the patient s cardiac electrical activity. Indeed only intracardiac electrograms EGMs are acquired by the implanted device and these signals are difficult to analyze directly by clinicians. In this paper we propose a patient-specific method to synthesize the surface electrocardiogram ECG from a set of EGM signals based on a 3D representation of the cardiac electrical activity and principal component analysis PCA . The results in the case of sinus rhythm show a correlation coefficient between the real ECG and the synthesized ECG of about 0.85. Moreover the application of the proposedmethodto the patients who present an abnormal heart rhythm exhibits promising results especially for characterizing the bundle branch blocs. Finally in order to evaluate the behavior of our procedure in some practical situations the quality of the ECG reconstruction is studied as a function ofthe number ofEGM electrodes provided by the CIDs. Copyright 2008 A. Kachenoura et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use
