Key result
Immature rat hearts displayed slowed electrical conduction, prolonged action potential duration, increased ventricular refractoriness, and slowed calcium handling compared to mature hearts.
Why the study?
Age-dependent changes in cardiac electrophysiology and calcium handling during postnatal development have not yet been fully characterized.
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Highlights age-specific cardiac electrophysiology in rats; leaves open translation to pediatric arrhythmia mechanisms or care.
Swift et al. (2019) studied Postnatal cardiac maturation. Postnatal development (age) vs. Adult rats was evaluated on Cardiac electrophysiology and calcium handling. Immature rat hearts displayed slowed electrical conduction, prolonged action potential duration, increased ventricular refractoriness, and slowed calcium handling compared to mature hearts.
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