Noninvasive conversion of a fixed-rate demand pacemaker to activity mode: a method for assessing the clinical effect of rate-responsiveness |
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Authors: | M D McGoon J Fetter |
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Affiliation: | Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN 55905. |
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Abstract: | Some patients with fixed-rate demand pacemakers may benefit from conversion to a rate-responsive pacing system. In this report, we describe a technique by which the effect of rate-responsive pacing can be assessed before replacing the pacemaker system. An externally positioned activity-mode physiologic pulse generator was used to drive a previously implanted ventricular demand pacemaker programmed to the triggered mode. Comparison of exercise capacity under both conditions suggested a substantial benefit from rate-responsiveness. |
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