PMC9520357_01
(A) 12-lead ECG and unipolar tip electrode electrogram obtained during sinus rhythm and (B) LBBP. (C) Three-dimensional printed model. (A) A LBB potential (red arrow) was recorded during the implant procedure. (B) During the threshold test, a transition from non-selective to selective LBBP was observed with a stable peak LV activation time of 75 ms. LBB, left bundle branch; LBBP, left bundle branch pacing; LV, left ventricular; IVS, interventricular septum.
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F1
The pacing lead was successfully placed in the LBB area and LBB potential was recorded with a low capture threshold of 0.75V/0.5ms (Figure 1A). The transition from non-selective LBBP to selective LBBP was recorded with the same peak LV activation time of 75 ms (Figure 1B). The printing procedure took ~5 h to complete. The result of the model is shown in Figure 1C.