FIGURE 3.

Box and whiskers plots of ventricular pacing percentage (Vp%) during the study period. The pacemaker's atrioventricular delay was fixed at programmed intervals for the first 3 months. After that, the ventricular pacing minimization algorithm was introduced at 6 months (9 months) and 12 months (15 months). Upper and lower box lines denote 75th and 25th percentiles, and the median is displayed in horizontal lines within boxes. The whiskers denote 5%–95% percentiles, while the individual data points (circles, squares, and triangles) indicate outliers. (A) Vp% of the total population at three time points: The adoption of algorithms resulted in a significant reduction of Vp%. (B) The Vp% for patients with a paced AV delay (PAVD) of 300 msec or less, whereas (C) shows the Vp% for patients with a paced AV delay greater than 300 msec, observed at 3, 9, and 15 months. In patients with PAVD ≤300 ms, the Vp% was lower than in the total population, significantly decreased after the application of the algorithm, and remained stable over time. In contrast, for the patient group with PAVD >300 ms, Vp% was quite high compared with the total population. Although there was a meaningful reduction after implementing the algorithm, the Vp% remained high and showed an increasing trend over time.