Search for: [Abstract = "The study investigated the properties of the pacemaker \(PM\) fractally coated endocavitary electrodes \(EE\) depending on the cathode type. The other aims\: to consider the possibility of manufacturing a \"lifetime pacemaker\" and to exam the preference of patients in relation to dimensions of the PM. The investigation included EE\: 190 TiN, 244 Ir, 90 Pt. It was shown that the high impedance EE had only a small effect on the PM estimated longevity. All EE manifested a good acute and distant pacing threshold.The pacing threshold in follow\-up showed a higher value compared to acute measurements \(0.64\-0.70V p=0.000\-0.039\). The high\-impedance Ir EE allowed for a lower distant stimulation threshold compared to the steroid active Pt EE \(p=0.017\-0.022\). The steroid active Pt EE showed no advantage with respect to the distant threshold in comparison to the passive TiN EE \(p=0.72\-0.89\). The rheobasis of the steroid Pt EE was 0.59V and the chronaxie was 0.23ms. The longevity of the 10µA quiescent current 2\-chamber PM equipped with Pt EE in case of using a 0.9Ah cell is of 9.3 yrs and 25.8 yrs with a 2.5Ah. The actual longevity of the 2\-chamber PM was 94 mths in TiN and 88 mths in Ir leads \(p=0.015\). The working time of the 1\-chamber PM was 115 mths, 2\-chamber \- 91 mths \(p=0.000\). The survey performed in a group of 145 patients with PM showed high acceptance of larger, but long\-lasting PM."]

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