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. 2022 Apr 5;30(5):249–257. doi: 10.1007/s12471-022-01679-7

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Fig. 2 — a–c Electrical characteristics of left bundle branch block (LBBB) patients. a Example of a 12-lead electrocardiogram during intrinsic LBBB (left) and left bundle branch area pacing (right) in the same patient. b Vectorcardiographic results of all LBBB patients (n = 7). c Schematic overview of the heart in the transverse plane with QRS vector of patients during LBBB and left bundle branch area pacing (n = 7), and QRS vector during intrinsic sinus rhythm in patients with normal conduction (n = 45)