Template:Ref-Mandarim-de-Lacerda1991 - Revision history

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	Mandarim-de-Lacerda CA. [[Paper - Growth allometry of the myocardium in human embryos from stages 15 to 23\|'''Growth allometry of the myocardium in human embryos (from stages 15 to 23)''']]. (1991) Acta Anat (Basel) 141: 251-256. [https://www.ncbi.nlm.nih.gov/pubmed/1755287 PMID 1755287]]		Mandarim-de-Lacerda CA. [[Paper - Growth allometry of the myocardium in human embryos from stages 15 to 23\|'''Growth allometry of the myocardium in human embryos (from stages 15 to 23)''']]. (1991) Acta Anat (Basel) 141: 251-256. [https://www.ncbi.nlm.nih.gov/pubmed/1755287 PMID 1755287] <noinclude>[[Category:Template]][[Category:Reference]][[Category:1990's]][[Category:Human Embryo]][[Category:Heart]][[Category:Carnegie Stage 15]][[Category:Carnegie Stage 16]][[Category:Carnegie Stage 17]][[Category:Carnegie Stage 18]][[Category:Carnegie Stage 19]][[Category:Carnegie Stage 20]][[Category:Carnegie Stage 21]][[Category:Carnegie Stage 22]][[Category:Carnegie Stage 23]]</noinclude>

Z8600021 at 00:51, 16 March 2020

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	~~{{#pmid:1755287}}~~		Mandarim-de-Lacerda CA. [[Paper - Growth allometry of the myocardium in human embryos from stages 15 to 23\|'''Growth allometry of the myocardium in human embryos (from stages 15 to 23)''']]. (1991) Acta Anat (Basel) 141: 251-256. [https://www.ncbi.nlm.nih.gov/pubmed/1755287 PMID 1755287]]

	~~Acta Anat (Basel)~~. ~~1991;141(3):251~~-6.

	~~'''~~Growth allometry of the myocardium in human embryos (from stages 15 to 23)'''
	~~Mandarim-de-Lacerda CA.~~

	~~Abstract~~
	~~The relative growth~~ of the myocardium ~~was studied~~ in ~~27 staged~~ human embryos (~~Carnegie~~ stages). ~~The volume of the myocardium was determined for each embryo according to Cavalieri's principle~~ (~~by using point-counting planimetry to determine the area of the profiles of the myocardium~~)~~. The volume of the myocardium~~ (~~variable Y~~) ~~was correlated to embryonic crown~~-~~rump length (variable X in millimeters) and age (in days)~~. ~~The bivariate allometric equation was used as Y = aXb~~. ~~The scatterplot was discontinuous, presenting two trends during the postsomitic period~~. ~~The first part was composed of embryos staged from stages 15 to 20, and the second part by embryos staged from stages 21 to 23~~. ~~The breakpoint between these different trends was found at the level of stage 20 (embryo of 22 mm in crown-rump length and age nearly of 52 days)~~. From stages 15 to 20, the growth rate of the myocardium was allometrically negative. On the other hand, from stages 21 to 23 this growth rate was moderately allometrically positive. These differences in growth of the myocardium were analyzed and, at least partially, might be due to the functional circulatory increase in the peripheral vascular bed in correlation to the cardiac hemodynamic demand required at the end of the embryonic period proper.
	PMID: 1755287 ~~DOI: 10.1159/000147130~~

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Acta Anat (Basel). 1991;141(3):251-6.

'''Growth allometry of the myocardium in human embryos (from stages 15 to 23)'''
Mandarim-de-Lacerda CA.

Abstract
The relative growth of the myocardium was studied in 27 staged human embryos (Carnegie stages). The volume of the myocardium was determined for each embryo according to Cavalieri's principle (by using point-counting planimetry to determine the area of the profiles of the myocardium). The volume of the myocardium (variable Y) was correlated to embryonic crown-rump length (variable X in millimeters) and age (in days). The bivariate allometric equation was used as Y = aXb. The scatterplot was discontinuous, presenting two trends during the postsomitic period. The first part was composed of embryos staged from stages 15 to 20, and the second part by embryos staged from stages 21 to 23. The breakpoint between these different trends was found at the level of stage 20 (embryo of 22 mm in crown-rump length and age nearly of 52 days). From stages 15 to 20, the growth rate of the myocardium was allometrically negative. On the other hand, from stages 21 to 23 this growth rate was moderately allometrically positive. These differences in growth of the myocardium were analyzed and, at least partially, might be due to the functional circulatory increase in the peripheral vascular bed in correlation to the cardiac hemodynamic demand required at the end of the embryonic period proper.
PMID: 1755287 DOI: 10.1159/000147130