Key result
Postnatal development of rat myocardial cells showed increasing fiber thickness and mitochondrial fraction up to day 20, with distinct differences between atrial and ventricular cells emerging at day 10.
Authors
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Rat postnatal maturation data warrant no clinical extrapolation; leaves open timing of atrial-ventricular divergence for human studies.
Observational
Hirakow et al. (1980) conducted an observational in Healthy postnatal development. Postnatal development (age) vs. Different developmental time points was evaluated on Ultrastructural differentiation and growth of myocardial cells. Postnatal development of rat myocardial cells showed increasing fiber thickness and mitochondrial fraction up to day 20, with distinct differences between atrial and ventricular cells emerging at day 10.
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