Figure 2 Vertical distance from the tip of the pacing electrode to the anterior descending branch during systole. (A) AP + CRA 30° 47 mm in fluoroscopy. (B) AP + CAU 30° 17 mm in fluoroscopy. (C) LAO 30° + CRA 20° in fluoroscopy (the tip of the pacing electrode overlaps with the anterior descending branch, so the vertical distance is measured as 0 mm). (D) LAO 45° + CAU 30° 75 mm in fluoroscopy. The maximum distance is 12.17 mm.