Geometric Features of Vertebrobasilar Arterial System in Adult Black Kenyans

SUMMARY: Geometric features of vertebrobasilar system influence occurrence of posterior circulation atherosclerosis, aneurysms, stroke and neuroradiological procedures. These features show ethnic variation, but data from black Africans in Sub Saharan Africa are scarce. This study aimed to describe g...

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Autores principales:	Ogeng'o,Julius A., Mwachaka,Philip M., Odhiambo,Dan E., Sinkeet-Hemed-Elbusaidy,Simeon R., Olabu,Beda, Inyimili,Martin
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2018
Materias:	Vertebrobasilar system Geometry Sexual dimorphism Africans
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000200544
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spelling	oai:scielo:S0717-950220180002005442019-09-16Geometric Features of Vertebrobasilar Arterial System in Adult Black KenyansOgeng'o,Julius A.Mwachaka,Philip M.Odhiambo,Dan E.Sinkeet-Hemed-Elbusaidy,Simeon R.Olabu,BedaInyimili,Martin Vertebrobasilar system Geometry Sexual dimorphism Africans SUMMARY: Geometric features of vertebrobasilar system influence occurrence of posterior circulation atherosclerosis, aneurysms, stroke and neuroradiological procedures. These features show ethnic variation, but data from black Africans in Sub Saharan Africa are scarce. This study aimed to describe geometric features of vertebrobasilar system in a black Kenyan population. It was a descriptive cadaveric study at Department of Human Anatomy, University of Nairobi. One hundred and seventy three formalin-fixed adult brains of individuals (99 male; 74 female; Age range 20 - 79) who had died of non cerebrovascular causes were studied. Level and angle of confluence of vertebral artery; diameter, length and bifurcation angles of basilar artery were measured. Data were analysed by SPSS version 21 for windows. The student t - test was used to determine the sex differences at 95 % confidence interval. Data are presented in macrographs, tables and bar charts. Confluence of vertebral arteries occurred at the sulcus bulbopontinus in 79.8 %; rostral to it in 11.5 % and caudal to it in 8.7 % of cases. Mean angle of vertebral artery confluence was 46.7º and 68.9º in males and females respectively (p£0.042). Mean length of the basilar artery was 26.8 mm; 26.3 mm in males and 27.1 mm in females (p=0.465). Mean diameter was 3.52 mm; 3.32 mm in males and 3.72 mm in females (p=0.002). The mean angle of basilar artery bifurcation was 120.3º ± 15.2; 99.3º ± 32.9 in males and 140.3º ± 16.1 in females (p=0.024). It was wider than 90º in 82.9 % of males and 95.9 % females (p=0.032). In 85 (49.1 %) it was wider than 120º. The vertebrobasilar system in the Kenyan population has geometric features that constitute risk factors for atherosclerosis. These features display sex dimorphism which may explain differences in prevalence of atherosclerosis and aneurysms. Neurosurgeons and neurologists should be aware of these differences. Individuals with risk prone geometric features should be followed up for atherosclerosis.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.36 n.2 20182018-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000200544en10.4067/S0717-95022018000200544
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Vertebrobasilar system Geometry Sexual dimorphism Africans
spellingShingle	Vertebrobasilar system Geometry Sexual dimorphism Africans Ogeng'o,Julius A. Mwachaka,Philip M. Odhiambo,Dan E. Sinkeet-Hemed-Elbusaidy,Simeon R. Olabu,Beda Inyimili,Martin Geometric Features of Vertebrobasilar Arterial System in Adult Black Kenyans
description	SUMMARY: Geometric features of vertebrobasilar system influence occurrence of posterior circulation atherosclerosis, aneurysms, stroke and neuroradiological procedures. These features show ethnic variation, but data from black Africans in Sub Saharan Africa are scarce. This study aimed to describe geometric features of vertebrobasilar system in a black Kenyan population. It was a descriptive cadaveric study at Department of Human Anatomy, University of Nairobi. One hundred and seventy three formalin-fixed adult brains of individuals (99 male; 74 female; Age range 20 - 79) who had died of non cerebrovascular causes were studied. Level and angle of confluence of vertebral artery; diameter, length and bifurcation angles of basilar artery were measured. Data were analysed by SPSS version 21 for windows. The student t - test was used to determine the sex differences at 95 % confidence interval. Data are presented in macrographs, tables and bar charts. Confluence of vertebral arteries occurred at the sulcus bulbopontinus in 79.8 %; rostral to it in 11.5 % and caudal to it in 8.7 % of cases. Mean angle of vertebral artery confluence was 46.7º and 68.9º in males and females respectively (p£0.042). Mean length of the basilar artery was 26.8 mm; 26.3 mm in males and 27.1 mm in females (p=0.465). Mean diameter was 3.52 mm; 3.32 mm in males and 3.72 mm in females (p=0.002). The mean angle of basilar artery bifurcation was 120.3º ± 15.2; 99.3º ± 32.9 in males and 140.3º ± 16.1 in females (p=0.024). It was wider than 90º in 82.9 % of males and 95.9 % females (p=0.032). In 85 (49.1 %) it was wider than 120º. The vertebrobasilar system in the Kenyan population has geometric features that constitute risk factors for atherosclerosis. These features display sex dimorphism which may explain differences in prevalence of atherosclerosis and aneurysms. Neurosurgeons and neurologists should be aware of these differences. Individuals with risk prone geometric features should be followed up for atherosclerosis.
author	Ogeng'o,Julius A. Mwachaka,Philip M. Odhiambo,Dan E. Sinkeet-Hemed-Elbusaidy,Simeon R. Olabu,Beda Inyimili,Martin
author_facet	Ogeng'o,Julius A. Mwachaka,Philip M. Odhiambo,Dan E. Sinkeet-Hemed-Elbusaidy,Simeon R. Olabu,Beda Inyimili,Martin
author_sort	Ogeng'o,Julius A.
title	Geometric Features of Vertebrobasilar Arterial System in Adult Black Kenyans
title_short	Geometric Features of Vertebrobasilar Arterial System in Adult Black Kenyans
title_full	Geometric Features of Vertebrobasilar Arterial System in Adult Black Kenyans
title_fullStr	Geometric Features of Vertebrobasilar Arterial System in Adult Black Kenyans
title_full_unstemmed	Geometric Features of Vertebrobasilar Arterial System in Adult Black Kenyans
title_sort	geometric features of vertebrobasilar arterial system in adult black kenyans
publisher	Sociedad Chilena de Anatomía
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022018000200544
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Geometric Features of Vertebrobasilar Arterial System in Adult Black Kenyans

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