Why the study?
Does physiological rate responsive pacing using the QT interval improve cardiac output and exercise capacity compared to fixed rate pacing in patients?
Does physiological rate responsive pacing using the QT interval improve cardiac output and exercise capacity compared to fixed rate pacing in patients?
Physiological rate responsive pacing using the QT interval provides a simple means of increasing heart rate and significantly improves cardiac output and exercise capacity compared to fixed rate pacing.
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May improve exercise capacity in select patients; leaves open whether QT-based rate-responsive pacing warrants broader evaluation.
Donaldson et al. (1983) studied this question.
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