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Arquivos Brasileiros de Cardiologia

Print version ISSN 0066-782XOn-line version ISSN 1678-4170


XAVIER-VIDAL, Ricardo  and  MADI, Kalil. Comparison between right and left ventricular myocardia during the human fetal period. Stereological evaluation. Arq. Bras. Cardiol. [online]. 1999, vol.72, n.5, pp.587-592. ISSN 1678-4170.

PURPOSE: To develop a stereological comparison between right (RV) and left ventricle (LV) myocardium during the third human gestational trimester. METHODS: Five human fetal hearts of the third trimester provided representative samples of 5 RV myocardium and 4 LV myocardium. The material was fixed in 10% buffered formaldehyde, and processed through routine methods. Fifteen microscopic fields were randomly chosen and counted in each ventricular myocardium using an "M-42" test system. The following stereological parameters were assessed: Vv (%), Lv (µm2), Sv (µm2/µm3), Vp (µm3), Nv (1/mm3) and total N. RESULTS: No significant difference between the stereological parameters of the myocardial structures assessed was evidenced, when comparing RV and LV. CONCLUSION: Right and left human ventricular myocardium are very similar during the fetal period at least in regard to their structural aspects.

Keywords : cardiac development; fetus; morphology; morphometry; stereology; biometry.

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