Why the study?
Do electric currents applied during the absolute refractory period enhance contractility and systolic calcium in Langendorff-perfused ferret hearts?
Population
10 Langendorff-perfused ferret hearts
Comparison
Biphasic square-wave electric currents delivered… vs Baseline at varying extracellular Ca…
Design
Preclinical
Authors
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No immediate clinical application; hypothesis-generating for calcium-dependent inotropy in refractory-period stimulation.
Do electric currents applied during the absolute refractory period enhance contractility and systolic calcium in Langendorff-perfused ferret hearts?
Positive inotropism from electric currents applied during the absolute refractory period is driven by increased peak intracellular calcium rather than changes in myofilament calcium responsiveness.
Mohri et al. (2003) studied this question.
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