It was reported that when the device was interrogated the battery impedance was 23.75 kohms and the recommended replacement time (rrt) was reached.The device had switched to post service parameters and no follow-up testing was possible.At the last follow-up 9 months earlier on (b)(6) 2017 the battery impedance was 1.94 kohms but no time to replacement was found.Prior to the switch to the parameter switch at rrt, device was programmed as follows: dddr @60 ppm a ¿ 99% paced, 401 ohms, 2.0 v / 0.5 ms.V ¿ 88% paced, 313 ohms, 4 v / 1.0 ms.
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