Population
15 normal subjects during sinus rhythm and 6 patients with a fixed atrial rate (n=21)
Design
Cross-sectional
Authors
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R-Tapex variance should not be interpreted as a neural marker during atrial pacing; leaves open its role in repolarization risk assessment.
Neural modulatory mechanisms do not appear to exert a direct effect on the length of the R-Tapex interval, as physiological variability is abolished by atrial pacing.
Lombardi et al. (1996) studied this question.
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