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. 2021 Oct;10(3):181–189. doi: 10.15420/aer.2021.32

Figure 7: Area of His and the Left Bundle Branch Pacing.

Figure 7:

A: Simulated (gross human specimen) right anterior oblique view of the right heart showing the limits of the triangle of Koch. The white point marks the area of the His bundle. B1 and B2: Fluoroscopic views in right anterior oblique projection demonstrating the HB and the LBB pacing lead distal to the aortic prosthetic valves (TAVR). C: LBB pacing lead 17 mm below and apical to the HB pacing lead position, as seen from the ventricular aspect in right anterior oblique fluoroscopic view. Dashed lines in A and C indicate the schematics of the left bundle branch and its branches on the left side of the interventricular septum. CSO = coronary sinus orifice; HB = His bundle; LBB = left bundle branch; OF = oval fossa; RAA = right atrial appendage; RVOT = right ventricular outflow tract; STV = septal leaflet of the tricuspid valve; TAVR = transcatheter aortic valve replacement; TC = terminal crest.