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. 2021 Sep 28;2(6Part A):588–596. doi: 10.1016/j.hroo.2021.09.007

Figure 2.

Figure 2

Example of measurement of electrical delays on the Biotronik Renamic (Biotronik SE & Co. KG, Berlin, Germany) programmer screen. Atrial, right ventricular (RV), and left ventricular (LV) electrograms were displayed at a sweep speed of 100 mm/s. The distance between 2 calipers was indicated in ms. A: RVs-LVs (31 ms); calipers are manually positioned to measure interval from the peak of the first fragmentation of RV wave pattern to the peak of the first fragmentation of LV wave pattern. B: RVp-LVs (134 ms), automatically measured by the programmer between the RV-pace marker and the LV-sense marker (calipers are not used but shown to demonstrate the interval approximately). C: LV1 tip pacing – LV4 ring sensing (59 ms); calipers are manually positioned on the LV pace marker and on the peak of the first fragmentation of LV wave pattern. D: LV4 ring pacing – LV1 tip sensing (90 ms); calipers are positioned as in panel C. In panels B–D, wave pattern cannot be shown during the blanking period after RV pacing and LV pacing. A = atrial; FF = far-field signal; p = paced; s = sensed.