Mechanisms of the Spatial Distribution of QT Intervals on the Epicardial and Body Surfaces
Population
Human subjects and isolated canine hearts (normal and myocardial infarction models)
Design
Preclinical
Authors
Discussion
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Member takes
Implication
QTI should not guide local recovery assessment in experimental models; leaves open whether STT area better indexes epicardial dispersion.
Structured PICO
P
Population
Human subjects and isolated canine hearts (normal and myocardial infarction models)
I
Intervention
High-resolution spatial mapping of QT intervals, potentials, recovery times, and STT areas during atrial and ventricular pacing
O
Outcome
Spatial distributions of QT intervals compared with potential distributions and recovery timessurrogate
QT interval distribution is heavily influenced by the zero potential line rather than local recovery times, suggesting STT area may be a better index of epicardial recovery time dispersion.
Cite This Study
Punske et al. (1999) studied this question.