{"id":2156,"date":"2011-02-19T06:00:06","date_gmt":"2011-02-19T12:00:06","guid":{"rendered":"http:\/\/www.paristn.net\/articles\/?p=2156"},"modified":"2011-02-17T22:55:40","modified_gmt":"2011-02-18T04:55:40","slug":"acute-anemia-linked-to-silent-strokes-in-children","status":"publish","type":"post","link":"https:\/\/www.paristn.net\/articles\/2011\/02\/19\/acute-anemia-linked-to-silent-strokes-in-children\/","title":{"rendered":"Acute Anemia linked to silent Strokes in Children"},"content":{"rendered":"

\"AmericanLos Angeles, CA<\/strong> – Silent strokes, which have no immediate symptoms but could cause long-term cognitive and learning deficits, occur in a significant number of severely anemic children, especially those with sickle cell disease, according to research presented at the American Stroke Association\u2019s International Stroke Conference 2011.<\/p>\n

One-quarter to one-third of children with sickle cell disease have evidence of silent strokes in their brains, according to Michael M. Dowling, M.D., Ph.D., lead author of the study and assistant professor of pediatrics and neurology at the University of Texas Southwestern Medical Center in Dallas.<\/p>\n

\u201cThese are 5- to 10-year-old children who have brains that look like the brains of 80-year-olds,\u201d Dowling said. \u201cThese strokes are called \u2018silent\u2019 because they don\u2019t cause you to be weak on one side or have any obvious neurologic symptoms. But they can lead to poor academic performance and severe cognitive impairments.\u201d<\/p>\n

Sickle cell disease is a blood disorder characterized by low levels of hemoglobin, the iron-containing component of red blood cells that carries oxygen. Low hemoglobin causes anemia. In sickle cell disease, the blood cells are misshapen (sickle-shaped) and may form clots or block blood vessels. About 10 percent of children with sickle cell disease suffer a stroke. Blood transfusions can reduce the high risk of repeat strokes.<\/p>\n

Dowling and colleagues hypothesized that silent strokes occur during severe anemia and may be detectable by MRI. They used MRI on the brains of 52 hospitalized children 2- to 19-years-old at Children\u2019s Medical Center Dallas with hemoglobin concentrations dropping below 5.5 g\/dL. They compared severely anemic children with sickle cell disease to a group of children without sickle cell disease who had hemoglobin levels below 5.5 g\/dL.<\/p>\n

They identified silent strokes in about 20 percent of the children with sickle cell disease who were experiencing acute anemia. They also saw evidence of silent strokes, though not as often, in severely anemic children who didn\u2019t have sickle cell disease.<\/p>\n

The many reasons, besides sickle cell disease, why children could have anemia include trauma, surgery, iron deficiency or cancer such as leukemia.<\/p>\n

\u201cThese are brain injuries that go unnoticed by doctors, unless the children have testing with a special MRI,\u201d he said. \u201cWe looked at every child who went to the hospital for a 30-month period and identified about 400 children that came in with hemoglobin below 5.5 g\/dL. That represented about 12 percent of the admissions for sickle cell disease and about 1 percent of the total admissions to Children\u2019s Medical Center.\u201d<\/p>\n

The findings suggest that children with or without sickle cell disease who have acute anemia could be suffering undetected brain damage. The researchers suggest that all children with severe anemia need careful examination for silent strokes.<\/p>\n

Improved recognition and timely transfusion to increase blood hemoglobin levels could prevent permanent brain damage in children with silent strokes, according to the study.<\/p>\n

Future studies should look at larger groups of children for longer periods to better understand the impact of acute anemia on children, Dowling said.<\/p>\n

Co-authors are: Charles T. Quinn, M.D., M.S; Patricia Plumb, R.N., M.S.N.; Zora R. Rogers, M.D.; Nancy Rollins, M.D.; Korgun Koral, M.D.; Robert Barber, Ph.D. and George R Buchanan, M.D.<\/p>\n

Author disclosures are on the abstract.<\/p>\n

The Children\u2019s Clinical Research Advisory Committee of Children\u2019s Medical Center Dallas funded the study.<\/p>\n

Statements and conclusions of study authors that are presented at American Heart Association scientific meetings are solely those of the study authors and do not necessarily reflect association policy or position. The association makes no representation or warranty as to their accuracy or reliability. The association receives funding primarily from individuals; foundations and corporations (including pharmaceutical, device manufacturers and other companies) also make donations and fund specific association programs and events. The association has strict policies to prevent these relationships from influencing science content. Revenues from pharmaceutical and device corporations are available at <\/em>www.heart.org\/corporatefunding<\/em><\/a>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Los Angeles, CA – Silent strokes, which have no immediate symptoms but could cause long-term cognitive and learning deficits, occur in a significant number of severely anemic children, especially those with sickle cell disease, according to research presented at the American Stroke Association\u2019s International Stroke Conference 2011. One-quarter to one-third of children with sickle cell […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[86],"tags":[2538,3019,2525,1416,2516,3021,3020,3018,3017],"class_list":["post-2156","post","type-post","status-publish","format-standard","hentry","category-health","tag-american-heart-association","tag-anemia","tag-cancer","tag-children","tag-hemoglobin","tag-leukemia","tag-mri","tag-sickle-cell-disease","tag-stokes"],"_links":{"self":[{"href":"https:\/\/www.paristn.net\/articles\/wp-json\/wp\/v2\/posts\/2156","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.paristn.net\/articles\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.paristn.net\/articles\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.paristn.net\/articles\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.paristn.net\/articles\/wp-json\/wp\/v2\/comments?post=2156"}],"version-history":[{"count":1,"href":"https:\/\/www.paristn.net\/articles\/wp-json\/wp\/v2\/posts\/2156\/revisions"}],"predecessor-version":[{"id":2158,"href":"https:\/\/www.paristn.net\/articles\/wp-json\/wp\/v2\/posts\/2156\/revisions\/2158"}],"wp:attachment":[{"href":"https:\/\/www.paristn.net\/articles\/wp-json\/wp\/v2\/media?parent=2156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.paristn.net\/articles\/wp-json\/wp\/v2\/categories?post=2156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.paristn.net\/articles\/wp-json\/wp\/v2\/tags?post=2156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}