Patent foramen ovale and hypobaric decompression.

  title={Patent foramen ovale and hypobaric decompression.},
  author={Michael R. Powell and W T Norfleet and Kadappagari Vijaya Kumar and Bruce D. Butler},
  journal={Aviation, space, and environmental medicine},
  volume={66 3},
Gas microbubbles were detected in the left ventricle of a supine subject being screened for an atrial septal defect as a participant of a hypobaric decompression study. This determination was made using the saline echocontrast procedure. We found provocation by a Valsalva maneuver not to be necessary in this individual for right-to-left passage of contrast microbubbles into the left heart and middle cerebral artery. When this same individual underwent hypobaric decompression to a simulated… CONTINUE READING

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