Abstract
Rate responsive pacing was performed in 62 patients. Pacing modes were AAI in 18 cases and VVI in all the rest. By rate responsive VVI, clinical symptoms were improved in about 70% of patients. In young patients with good cardiac function, rate responsive VVI can be adopted. In older patients with impaired cardiac function, DDD pacing is preferable. Hemodynamic state can deteriorate by rate responsive VVI in patients with retrograde conduction. Sick sinus syndrome with no atrio-ventricular conduction disturbance is the best candidate for rate responsive AAI.
