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  • Title: [Activity-initiated rate-adapted pacemaker therapy. Clinical results].
    Author: Kochs M, Winter UJ, Brägas B, Hannekum A, Eggeling T, Osterspey A, Hombach V, Hilger HH.
    Journal: Dtsch Med Wochenschr; 1987 Oct 23; 112(43):1647-51. PubMed ID: 3665756.
    Abstract:
    In a prospective study of 23 patients the clinical effects of rate-adapted activity-sensed (by mechanical resonance oscillations) pacing (Activitrax system) were tested over a mean period of 8.1 +/- 3.8 months. This form of pacemaker treatment was used when, after exercise and on long-term ECG monitoring, the spontaneous heart rate had not exceeded 85 beats per min and there had been symptoms of decreased exercise tolerance. Lasting improvement in physical exercise tolerance was achieved in 11 of 17 patients after changing from fixed-rate to rate-adapted pacing. Treadmill ergometry, randomised in the fixed-rate or rate-adapted mode, brought about a significant rise in exercise tolerance (P greater than 0.01). Contrary to results after external influences, insufficient rate increases in five patients in the course of static stress was of clinical significance and thus narrow the indications for this type of pacing.
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