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(Stroke. 2009;40:S79.)
© 2009 American Heart Association, Inc.

Prevention 2: High-Risk Populations

Arterial Ischemic Stroke

Common Risk Factors in Newborns and Children

From the Maimonides Infants and Children’s Hospital and Mount Sinai School of Medicine, Brooklyn, NY.

Correspondence to Steven Pavlakis, Maimonides Infants and Children’s Hospital, 977 48th St, Brooklyn, NY 11219. E-mail SPavlakis@Maimonidesmed.org

Key Words: stroke • infarction • newborn • pediatric • sickle cell disease

An extract of the first 250 words of the full text is provided, because this article has no abstract.

	Introduction

 
Little is known about risk factors in pediatric and newborn arterial ischemic stroke (AIS). Risk factors regarding pediatric AIS are evolving and include, in order of prevalence: vasculopathy, infection, cardiac disease, sickle cell disease (SCD), and "other" causes. However, as many as 27% of pediatric and most newborn strokes have no identifiable risk factor.¹

	Perinatal AIS

 
The incidence of perinatal AIS, defined as occurring one month before to one month after delivery, is approximately 4 per 10 000 full-term babies.² Direct causes for newborn stroke are not well understood. Predisposing maternal factors may include choreoamnionitis, premature rupture of membranes, and first-time pregnancy.³ The birthing process itself may be a risk, and AIS is likely polygenic. In neonates with hypoxic ischemic encephalopathy (HIE), 10% of those with severe HIE may have focal infarcts. Thrombophilias and vasculopathies as determined by MRA are rare.³ Perinatal stroke does not usually recur.

	Pediatric AIS

 
Pediatric AIS is defined as occurring age 1 month through 18 years with a peak at about age 5 years.³ Risk factors include arteriopathies, infection, cardiac disease, blood disorders, and heritability. There is overlapping pathophysiology of many of these risk factors.

	Arteriopathies

 
Arteriopathies may be acute, transient, or progressive and can occur in about 50% of children with AIS, but estimates vary between series.¹ The most common arteriopathies are focal arteriopathy of childhood (FAC), Moyamoya, and arterial dissection.¹ FAC is coined by the International Pediatric Stroke Study Group (IPSS). Previous studies show an association with infectious agents such as varicella.^1,3,4,5 Additionally, arteriopathies are associated with sickle . . . [Full Text of this Article]