Click on image to view larger version.

Figure 3 Individual changes in peak oxygen consumption during DDD-OFF, DDD-ON, and DDDR-ON modes in patients who achieved <70% (n = 11) and 70% to 85% (n = 9) of age-predicted heart rate (HR) during exercise using DDD-OFF mode. *p values determined by analysis of variance with Bonferroni multiple-comparison tests.