PFO= patient foramen ovale. This is an opening between the left and right atria of the heart that should have closed before birth. This allows a right to left shunting of blood, thereby allowing bubbles to bypass the natural capillary filter of the lungs. Then bubbles, that would normally be filtered by the lungs, pass into the arterial circulation, and you are a prime target for a type II hit. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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