The Influence of Cardiac Pacemaker Programming Modes on Exercise Capacity

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Figure 1.
The influence of pacing programming modes on exercise capacity expressed in metabolic equivalents (METs). Patients wearing dual-chamber pacemakers with rate responsive function (RRF) activated (DDDR) had the best exercise capacity, while those with single-chamber pacemakers without RRF activated (VVI) had the worst exercise capacity. There was no significant difference between dual-chamber pacing, RRF not activated (DDD) and single-chamber pacing, RRF activated (VVIR).
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Figure 2.
Gender differences in exercise capacity [mean metabolic equivalents (METs) and 95% confidence interval] for the studied pacing modes. Pacing programming mode represents an independent predictor for exercise capacity in men, but not in women. VVI: Single-chamber pacemaker without rate responsive function (RRF) activated, VVIR: single-chamber pacemaker with RRF activated, DDD: dual-chamber pacemaker without RRF activated, DDDR: dual-chamber pacemaker with RRF activated.