Why the study?
Are QT interval changes during exercise governed by intrinsic heart rate or extrinsic factors, and can this relationship be used to design a physiologically adaptive pacemaker?
Population
Patients undergoing physiological exercise, patients undergoing atrial pacing without exercise, and patients…
Comparison
Assessment of QT interval dynamics to design a… vs Comparisons among physiological exercise, atrial…
Design
Other
Authors
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May guide QT-based rate-adaptive pacemaker development; leaves open clinical feasibility and outcomes.
Are QT interval changes during exercise governed by intrinsic heart rate or extrinsic factors, and can this relationship be used to design a physiologically adaptive pacemaker?
QT interval shortening during exercise is largely driven by factors extrinsic to heart rate, enabling the conceptualization and design of a novel physiologically adaptive pacemaker based on stimulus-evoked T wave intervals.
Rickards et al. (1981) studied this question.
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