The Experts below are selected from a list of 105 Experts worldwide ranked by ideXlab platform
Christofer Leygraf - One of the best experts on this subject based on the ideXlab platform.
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electrochemical behavior of stimulation sensing materials for Pacemaker Electrode applications iii nanoporous and smooth carbon Electrodes
Journal of The Electrochemical Society, 2005Co-Authors: Anna Norlin, Jinshan Pan, Christofer LeygrafAbstract:The electrochemical behavior of nanoporous and smooth carbon Electrodes was investigated in a phosphate-buffered saline solution. The interfacial properties were characterized by electrochemical im ...
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investigation of electrochemical behavior of stimulation sensing materials for Pacemaker Electrode applications ii conducting oxide Electrodes
Journal of The Electrochemical Society, 2005Co-Authors: Anna Norlin, Jinshan Pan, Christofer LeygrafAbstract:bSt. Jude Medical AB, SE-175 84 Jarfalla, Sweden The electrochemical behavior, interfacial properties, and stability of RuO 2-, IrO2-, sRu1˛xMnxdO2- and sIr1˛xMnxdO2-coated Electrodes for Pacemaker applications were investigated in a phosphate buffered saline solution, by electrochemical impedance spectroscopy and cyclic voltammetry ~CV!. The psuedocapacitive properties of these conducting oxides and influence of coating roughness and porosity were examined, and accelerated aging of the Electrode materials was simulated by fast sweep rate CV cycles between ˛3 to 1 V vs. Ag/AgCl. Changes in surface composition and structure due to the accelerated aging were investigated using X-ray photoelectron spectroscopy and scanning electron microscopy. The conducting oxides exhibit high interfacial capacitance. At high sweep rates, not all of total capacitance could be utilized due to voltage drop associated with resistance down the pores. Above a certain sweep rate, the charging/discharging mechanism changes from capacitive to resistive character. Showing the best performance among the investigated materials, the RuO2 exhibits capacitive characteristics at sweep rates up to 20 V/s and excellent stability under the accelerated aging. The IrO 2 coating was not stable during the cycling. The mixed oxides experience limitations at high sweep rates due to the ohmic effects and some degradation due to the accelerated aging.
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investigation of electrochemical behavior of stimulation sensing materials for Pacemaker Electrode applications i pt ti and tin coated Electrodes
Journal of The Electrochemical Society, 2005Co-Authors: Anna Norlin, Jinshan Pan, Christofer LeygrafAbstract:The electrochemical behavior, interfacial properties, and stability of Pt, Ti, smooth and rough TiN Electrodes for Pacemaker applications were investigated in a phosphate-buffered saline solution, ...
Anna Norlin - One of the best experts on this subject based on the ideXlab platform.
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electrochemical behavior of stimulation sensing materials for Pacemaker Electrode applications iii nanoporous and smooth carbon Electrodes
Journal of The Electrochemical Society, 2005Co-Authors: Anna Norlin, Jinshan Pan, Christofer LeygrafAbstract:The electrochemical behavior of nanoporous and smooth carbon Electrodes was investigated in a phosphate-buffered saline solution. The interfacial properties were characterized by electrochemical im ...
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investigation of electrochemical behavior of stimulation sensing materials for Pacemaker Electrode applications ii conducting oxide Electrodes
Journal of The Electrochemical Society, 2005Co-Authors: Anna Norlin, Jinshan Pan, Christofer LeygrafAbstract:bSt. Jude Medical AB, SE-175 84 Jarfalla, Sweden The electrochemical behavior, interfacial properties, and stability of RuO 2-, IrO2-, sRu1˛xMnxdO2- and sIr1˛xMnxdO2-coated Electrodes for Pacemaker applications were investigated in a phosphate buffered saline solution, by electrochemical impedance spectroscopy and cyclic voltammetry ~CV!. The psuedocapacitive properties of these conducting oxides and influence of coating roughness and porosity were examined, and accelerated aging of the Electrode materials was simulated by fast sweep rate CV cycles between ˛3 to 1 V vs. Ag/AgCl. Changes in surface composition and structure due to the accelerated aging were investigated using X-ray photoelectron spectroscopy and scanning electron microscopy. The conducting oxides exhibit high interfacial capacitance. At high sweep rates, not all of total capacitance could be utilized due to voltage drop associated with resistance down the pores. Above a certain sweep rate, the charging/discharging mechanism changes from capacitive to resistive character. Showing the best performance among the investigated materials, the RuO2 exhibits capacitive characteristics at sweep rates up to 20 V/s and excellent stability under the accelerated aging. The IrO 2 coating was not stable during the cycling. The mixed oxides experience limitations at high sweep rates due to the ohmic effects and some degradation due to the accelerated aging.
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investigation of electrochemical behavior of stimulation sensing materials for Pacemaker Electrode applications i pt ti and tin coated Electrodes
Journal of The Electrochemical Society, 2005Co-Authors: Anna Norlin, Jinshan Pan, Christofer LeygrafAbstract:The electrochemical behavior, interfacial properties, and stability of Pt, Ti, smooth and rough TiN Electrodes for Pacemaker applications were investigated in a phosphate-buffered saline solution, ...
W Sarnowski - One of the best experts on this subject based on the ideXlab platform.
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Pacemaker Electrode implantation in patients with persistent left superior vena cava
Heart, 1992Co-Authors: F Zerbe, J Bornakowski, W SarnowskiAbstract:Four out of 661 consecutive patients with permanent endocardial VVI pacing had the pacing lead introduced through a persistent left superior vena cava. It was difficult to introduce the lead from the right atrium into the right ventricle because the tip of the lead tended to be deflected away from the tricuspid orifice. This difficulty was overcome by shaping the lead into a pigtail with 3-4 cm wide loop. This avoided the risk of entering a branch of the coronary sinus in order to reach the right atrium. This technique made it easier to position the lead in the right ventricular apex. There were no complications in these four patients during a mean follow up of three years.
Jinshan Pan - One of the best experts on this subject based on the ideXlab platform.
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electrochemical behavior of stimulation sensing materials for Pacemaker Electrode applications iii nanoporous and smooth carbon Electrodes
Journal of The Electrochemical Society, 2005Co-Authors: Anna Norlin, Jinshan Pan, Christofer LeygrafAbstract:The electrochemical behavior of nanoporous and smooth carbon Electrodes was investigated in a phosphate-buffered saline solution. The interfacial properties were characterized by electrochemical im ...
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investigation of electrochemical behavior of stimulation sensing materials for Pacemaker Electrode applications ii conducting oxide Electrodes
Journal of The Electrochemical Society, 2005Co-Authors: Anna Norlin, Jinshan Pan, Christofer LeygrafAbstract:bSt. Jude Medical AB, SE-175 84 Jarfalla, Sweden The electrochemical behavior, interfacial properties, and stability of RuO 2-, IrO2-, sRu1˛xMnxdO2- and sIr1˛xMnxdO2-coated Electrodes for Pacemaker applications were investigated in a phosphate buffered saline solution, by electrochemical impedance spectroscopy and cyclic voltammetry ~CV!. The psuedocapacitive properties of these conducting oxides and influence of coating roughness and porosity were examined, and accelerated aging of the Electrode materials was simulated by fast sweep rate CV cycles between ˛3 to 1 V vs. Ag/AgCl. Changes in surface composition and structure due to the accelerated aging were investigated using X-ray photoelectron spectroscopy and scanning electron microscopy. The conducting oxides exhibit high interfacial capacitance. At high sweep rates, not all of total capacitance could be utilized due to voltage drop associated with resistance down the pores. Above a certain sweep rate, the charging/discharging mechanism changes from capacitive to resistive character. Showing the best performance among the investigated materials, the RuO2 exhibits capacitive characteristics at sweep rates up to 20 V/s and excellent stability under the accelerated aging. The IrO 2 coating was not stable during the cycling. The mixed oxides experience limitations at high sweep rates due to the ohmic effects and some degradation due to the accelerated aging.
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investigation of electrochemical behavior of stimulation sensing materials for Pacemaker Electrode applications i pt ti and tin coated Electrodes
Journal of The Electrochemical Society, 2005Co-Authors: Anna Norlin, Jinshan Pan, Christofer LeygrafAbstract:The electrochemical behavior, interfacial properties, and stability of Pt, Ti, smooth and rough TiN Electrodes for Pacemaker applications were investigated in a phosphate-buffered saline solution, ...
Tanju Ulufer - One of the best experts on this subject based on the ideXlab platform.
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an electrocardiographic algorithm for determining the location of Pacemaker Electrode in patients with right bundle branch block configuration during permanent ventricular pacing
Angiology, 2006Co-Authors: Ertan Okmen, Izzet Erdinler, Enis Oguz, Ahmet Akyol, Onur Turek, Nese Cam, Tanju UluferAbstract:The expected morphology of right ventricular pacing is a left bundle branch block (LBBB) pattern. However, right bundle branch block (RBBB) can also be seen during permanent right ventricular pacing. The aim of this study was to develop an electrocardiographic algorithm to differentiate this benign condition from septal and free wall perforation with subsequent left ventricular pacing. Three hundred consecutive patients who had permanent ventricular or dual-chamber Pacemaker implantation between 1999 and 2000 were screened and 25 patients (8.3%) who exhibited RBBB configuration were included in the study. Echocardiograms and chest radiographs were evaluated in order to identify the pacing lead location in this group. The authors formed a study group with their own 25 patients and 22 cases of RBBB with permanent Pacemaker from previous publications (total 47 patients). Frontal axis, QRS morphology in lead V(1), and the precordial transition point, which is defined as the precordial lead where R wave amplitude is equal to S wave amplitude, were examined. Placement of precordial leads V(1) and V(2) 1 interspace lower than the standard location (Klein maneuver) eliminated the RBBB pattern in 12 patients. RBBB pattern with "true right ventricular pacing" was detected in 24 of the 25 patients, and in 11 of the 22 patients reported in the literature (total 35 patients). Right ventricular pacing was correctly identified in 34 of 35 patients with use of criteria including left superior axis deviation, RS or qR morphology in lead V(1), and precordial transition at lead V(3) with a high sensitivity and specificity. A simple surface electrocardiogram can accurately predict the lead location in patients having RBBB morphology with right ventricular pacing.