Acute and Chronic Clinical Performance Comparison of a Porous and a Solid Electrode Design

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Abstract
The long-term performance of porous and solid ring-tipped electrodes was compared in clinical use over a one-year period. Each of the two electrode designs was implanted in 22 patients in conjunction with an output-programmable pacemaker. Implant evaluation included impedance, height of sensed R wave, and a strength-duration curve. Threshold determination by pulse-width programming was performed at the time of implant and at one week, two weeks, two months, six months, and one year. There were no dislodgements with either electrode. No significant differences were noted in the acute parameters or in chronic thresholds.

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