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The causal relationship between patent foramen ovale (PFO) and stroke is controversial. We hypothesized that if PFO is a pathway of embolic source, there might be a correlation between PFO characteristics (ie, size or extent of shunt) and ischemic lesion burden (ie, infarct volume and number).From ischemic stroke patients admitted to Asan Medical Center between January 2000 and October 2007, we identified...
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