Mapping of phase response properties of monopolar ECG voltages |
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| Institution: | 1. Department of Medicine, UMass Chan Medical School, Worcester, Massachusetts;2. Manning School of Business, UMass Lowell, Lowell, Massachusetts;3. UMass Center for Clinical and Translational Science, UMass Chan Medical School, Worcester, Massachusetts;4. Program in Molecular Medicine, UMass Chan Medical School, Worcester, Massachusetts;6. Department of Biomedical Engineering, UMass Lowell, Lowell, Massachusetts;5. Department of Anesthesiology and Perioperative Medicine, UMass Chan Medical School, Worcester, Massachusetts;7. Department of Surgery, UMass Chan Medicine School, Worcester, Massachusetts;11. Graduate School of Biomedical Sciences, UMass Chan School of Medicine, Worcester, Massachusetts;1. Electrophysiology Laboratory, St. Louis Children’s Hospital, St. Louis, Missouri;2. Washington University School of Medicine, St. Louis, Missouri;3. Division of Pediatric Cardiology, Washington University in St. Louis, St. Louis, Missouri;4. Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri;1. University Hospital Basel, Basel, Switzerland;2. Cardiovascular Research Institute Basel (CRIB), Basel, Switzerland;3. PulseAI, Belfast, United Kingdom |
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| Abstract: | In the present investigation an attempt has been made to study the phase response properties of monopolar chest lead ECG voltages. Using a generator model of the heart an equivalent circuit of ECG network has been developed. The equivalent impedance between WCT and probe electrode has been determined by reduction techniques. From this equivalent impedance the phasor characteristics of monopolar ECG voltages have been analysed for change in probe electrode locations. The source of the generated voltage, i.e., the heart, will develop a different voltage for its different condition. There will also be a change in impedances. Thus for the normal subject the distribution of the phasor of the ECG voltages will be different from that of the abnormal one. A software tool has been developed to evaluate the relative phase response of ECG voltages. The data acquisition of monopolar ECG records of chest leads V1 to V6 from chart recorder has been done with the help of AutoCAD application package. The harmonic constituents of ECG voltages have been evaluated at each harmonic plane and the phase characteristics have been studied in polar coordinate for normal subjects as well as for a typical case. An interesting result has been observed in typical cases which are indicated in the paper. |
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