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Manos, In an ASD, it is not the flap which in a PFO is normally closed by the left hearts higher pressure. The defect is there , always, so blood can be pushed back and hinders oxygenation in the blood. If all things run as should, this should be a pediatric affair and cured by an early operation. With my friend, it was discovered too late , in the early fifties, so the docs said no operation possible. She died of a blood vessel rupture and the ensuing embolism. I think someone with an ASD should not pass a medical for diving, and mostly would know of its condition, but I would certainly appreciate to be informed about the opposite if someone with a minor ASD had gotten a hit. In a PFO, the flap usually only opens when reverse pressure is applied voluntarily by thoracic pressure (heavy lifting, strenous activities when you hold your breath, valsalva manouvre), especially dangerous when you go down again within a period of decompression when still bubble loaded, be it freediving or on gas. Matthias Manos Manoli schrieb: > > Mathias then what is the diference between ASD and PFO i thought that > PFO is patent foramen ovale which is a congenital defect of the heart allowing > blood to flow directly between the right and left atria > (the small chambers above the ventricles). Which is something similar to your > description for ASD where do i have things mixed up ? > > Also where is the problem in diving ? Is it because Bubbles can pass too ? > or is it because of the Low blood oxygen levels and the increased risk of stroke > > Rgds Manos Manoli > Limassol - Cyprus > > Matthias Voss wrote: > > > Trey was referring to an atrium septum defect. This is , roughly > > speaking, a hole in the heart where it shouldn't be, allowing passage of > > venous blood ( left side) to the arterial side ( right side) . Bubbles > > can pass, too. > > > > > HTH. > > Matthias > > > > Steve Schultz schrieb: > > > > > > Can you expound on ASD? What is it? > > > > > > ss > > > > > > On Tue, 31 Jul 2001, Trey wrote: > > > > > > > This poor kid obviously had a gaping ASD or PFO, and > > > > took the worst kind of hit. This is the kind of thing that the scumbags at > > > > the training agencies don't seem to want to warn people about. > > > > > > > > -----Original Message----- > > > > From: SRS [mailto:sstraat1@ta*.rr*.co*] > > > > Sent: Tuesday, July 31, 2001 4:37 AM > > > > To: techdiver@aquanaut.com > > > > Subject: DCS incident > > > > > > > > > > > > I'd appreciate it if anyone can forward to me info regarding DCS treatment > > > > in the Michigan area - had a friend's nephew (16 years old, fairly > > > > experienced) get hit while on a 90 ft./:20 dive in Lake Michigan. Can't > > > > walk/urinate after two chamber rides. Who are the experts in that area, or > > > > who else (anywhere) should they consult. Trey, if you see this, whose the > > > > doc. who did the doppler studies on the WKPP guys (U. of MIami?) - the > > > > friend of mine lives down there, she could get info from him? Any help is > > > > appreciated. > > > > > > > > Thanks, > > > > > > > > Steve Straatsma > > > > > > > > > > -- > > > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > > > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > > -- > > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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