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Patent Foramen Ovale:Is Stroke Due to Paradoxical Embolism? Stroke 24:31-34, Ranoux,D.,et al, 1993 See this aricle in Pubmed Article Abstract A patent foramen ovale was found in 32 patients(47%).A Valsalva-provoking activity was present at stroke onset in six patients with a patent foramen ovale and in eight patients with no patent foramen ovale(X2=0.1, nonsignificant).Clinical/radiological features suggestive of an embolic mechanism were not more frequent in patients with a patent foramen ovale. Clinical evidence of deep vein thrombosis was present in one patient with a patent foramen ovale and in none of the others.No occult venous thrombosis was found in a subgroup of patients with a patent foramen ovale and no definite cause for stroke who underwent venography(n=13).Our results do not support the hypothesis that paradoxical embolism is the primary mechanism of stroke in patients with a patent foramen ovale.

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(click to filter results - removes previous filter) cerebral embolism cerebral embolism,cardiac origin cerebral infarction cerebrovascular accident cerebrovascular accident,activity at onset cerebrovascular accident,etiology embolism,paradoxical patent foramen ovale valsalva maneuver

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