Publication: Ultrastructure of atrial and ventricular myocytes of
newborn rats: evidence for the existence of specific
atrial granule-like organelles in the ventricle
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Date
1989
Authors
Venance, Shannon L. ; Pang, Stephen C.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
The present study examined the ultrastructure
of atrial and ventricular myocytes from the heart of
newborn rats. It was found that, despite former reports
stating that ventricular myocytes in adults do not contain
cytoplasmic granules, specific atrial granule-like
organelles are present in the ventricles of rats at birth.
The presence of these granules together with the
relatively underdeveloped contractile apparatus and
extensive Golgi complex suggests that the ventricular,
like the atrial, myocytes may have an endocrine function
before or at birth. Further study is required to determine
whether these ventricular cytoplasmic granules contain
the same atrial natriuretic peptide species known to be
present in the atrial specific granules.
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