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Do you have a patent foramen ovale?

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We would like to assess the incidence of patent foramen ovale (PFO) in the young healthy population through a minimally-invasive procedure involving injection of normal saline into the vein of the arm in conjunction with an ultrasound study of the arteries of the brain. The prevalence of PFO in the general population is approximately 25%. However, this number is drawn from studies that primarily looked at middle-aged individuals and older. By surveying the young healthy population, we can determine if the prevalence of PFO is consistent across all decades of life or if there is a relationship between decade of life and PFO. 

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