This paper describes a method that has been successfully used to evaluate human exposure to 60 Hz... more This paper describes a method that has been successfully used to evaluate human exposure to 60 Hz electric fields. An exposure measuring system that uses an electric field sensor vest and data collection instrumentation is presented. Exposure concepts and activity factors are discussed and experimental data collected with the exposure system are provided. This method can be used to measure exposure to a wide range of electric field with intensities from less than 1 V/m to more than 10 kV/m. Results may be translated to characterize various exposure criteria (time histogram of unperturbed field, surface fields, internal current density, total body current, etc).
L'invention concerne des ensembles d'electrodes comprenant des electrodes segmentees disp... more L'invention concerne des ensembles d'electrodes comprenant des electrodes segmentees disposees sur un catheter. Les electrodes segmentees peuvent etre construites sur la pointe du catheter. La pointe d'electrode (501) peut etre construite a partir d'un substrat electriquement isolant (505) comprenant une lumiere interne (533), une surface de pointe externe, et une pluralite de canaux s'etendant de la lumiere interne a la surface de pointe externe, une pluralite d'electrodes segmentees et une pluralite d'electrodes locales. Chacune de la pluralite d'electrodes segmentees et chacune de la pluralite d'electrodes locales peuvent etre separees lateralement l'une de l'autre par une partie de substrat electriquement non conductrice et chacune des electrodes locales et chacune des electrodes segmentees peuvent etre couplees electriquement a au moins un fil ou trace conducteur.
Cardiac mapping is an essential tool in arrhythmia diagnosis and treatment. Mapping information o... more Cardiac mapping is an essential tool in arrhythmia diagnosis and treatment. Mapping information obtained from signal processing and image display algorithms in present day electroanatomic mapping systems are critically dependent on measured electrograms (EGMs) from catheters. A collection of local activation times (LAT) derived from EGMs within a cardiac chamber Disclosures: D.C. Deno is an employee of Abbott Laboratories, St. Paul, MN. K. Nanthakumar and S. Massé are consultants for Abbott Laboratories, St. Paul, MN. K. Nanthakumar is a consultant for Biosense Webster, Irving, CA. K. Magtibay, A. Porta-Sanchez, S. K. Haldar have nothing to disclose.
Bipolar electrogram (Bi EGM)-based substrate maps are heavily influenced by direction of a wavefr... more Bipolar electrogram (Bi EGM)-based substrate maps are heavily influenced by direction of a wavefront to the mapping bipole. In this study, we evaluate high-resolution, orientation-independent peak-to-peak voltage (Vpp) maps obtained with an equi-spaced electrode array and omnipolar EGMs (OT EGMs), measure its beat-to-beat consistency, and assess its ability to delineate diseased areas within the myocardium compared against traditional Bi EGMs on two orientations: along (AL) and across (AC) array splines.
This paper describes a method that has been successfully used to evaluate human exposure to 60 Hz... more This paper describes a method that has been successfully used to evaluate human exposure to 60 Hz electric fields. An exposure measuring system that uses an electric field sensor vest and data collection instrumentation is presented. Exposure concepts and activity factors are discussed and experimental data collected with the exposure system are provided. This method can be used to measure exposure to a wide range of electric field with intensities from less than 1 V/m to more than 10 kV/m. Results may be translated to characterize various exposure criteria (time histogram of unperturbed field, surface fields, internal current density, total body current, etc).
L'invention concerne des ensembles d'electrodes comprenant des electrodes segmentees disp... more L'invention concerne des ensembles d'electrodes comprenant des electrodes segmentees disposees sur un catheter. Les electrodes segmentees peuvent etre construites sur la pointe du catheter. La pointe d'electrode (501) peut etre construite a partir d'un substrat electriquement isolant (505) comprenant une lumiere interne (533), une surface de pointe externe, et une pluralite de canaux s'etendant de la lumiere interne a la surface de pointe externe, une pluralite d'electrodes segmentees et une pluralite d'electrodes locales. Chacune de la pluralite d'electrodes segmentees et chacune de la pluralite d'electrodes locales peuvent etre separees lateralement l'une de l'autre par une partie de substrat electriquement non conductrice et chacune des electrodes locales et chacune des electrodes segmentees peuvent etre couplees electriquement a au moins un fil ou trace conducteur.
Cardiac mapping is an essential tool in arrhythmia diagnosis and treatment. Mapping information o... more Cardiac mapping is an essential tool in arrhythmia diagnosis and treatment. Mapping information obtained from signal processing and image display algorithms in present day electroanatomic mapping systems are critically dependent on measured electrograms (EGMs) from catheters. A collection of local activation times (LAT) derived from EGMs within a cardiac chamber Disclosures: D.C. Deno is an employee of Abbott Laboratories, St. Paul, MN. K. Nanthakumar and S. Massé are consultants for Abbott Laboratories, St. Paul, MN. K. Nanthakumar is a consultant for Biosense Webster, Irving, CA. K. Magtibay, A. Porta-Sanchez, S. K. Haldar have nothing to disclose.
Bipolar electrogram (Bi EGM)-based substrate maps are heavily influenced by direction of a wavefr... more Bipolar electrogram (Bi EGM)-based substrate maps are heavily influenced by direction of a wavefront to the mapping bipole. In this study, we evaluate high-resolution, orientation-independent peak-to-peak voltage (Vpp) maps obtained with an equi-spaced electrode array and omnipolar EGMs (OT EGMs), measure its beat-to-beat consistency, and assess its ability to delineate diseased areas within the myocardium compared against traditional Bi EGMs on two orientations: along (AL) and across (AC) array splines.
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Papers by Don Deno