Improved Cardiac Effiency Post-PFO Closure

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Feb 2012
8:43am, 2 Feb 2012
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Frobester
Are there any medical types here who can advise me how and why this may be happening?

I recently (last December) had a PFO closure following a cryptogenic TIA. (see, I know all the acronyms now). I was advised that, as a runner, I may notice improved cardiac effiency - can anyone tell me how and why?

I realise I most likely need to speak to the cardiothoracic specialist who carried out the op, but in the meantime any clues from anyone vaguely connected with medical science would be grand. Thanks.
Feb 2012
8:54am, 2 Feb 2012
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plodding hippo
Im not a cardiologist, but i am surprised you have been told that
If your PFO had been ausing haemodynamic compromise, then yes, correcting it might well improve cardica function, but if that was the case i suspect things would have bee picked up much earlier.And it is the big PFOs which cause issues
wasnt your PFO very small?/

Glad you are all sorted though
Feb 2012
8:54am, 2 Feb 2012
39,034 posts
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plodding hippo
Im not a cardiologist, but i am surprised you have been told that
If your PFO had been ausing haemodynamic compromise, then yes, correcting it might well improve cardica function, but if that was the case i suspect things would have bee picked up much earlier.And it is the big PFOs which cause issues
wasnt your PFO very small?/

Glad you are all sorted though
Feb 2012
8:59am, 2 Feb 2012
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Frobester
It was 1.5cm in diameter. I'm not sure whether that's large or small, although the surgeon told me he used a large septal occluder. I guess what he was saying was that the PFO, unknown to me, may have caused some sort of compromise short of ischaemia, which therefore didn't manifest itself as an attack, and therefore I didn't seek any medical assistance.
The stress I put on my system as a a result of age, dehydration, South Downs marathon and lack of sleep, pushed it into ischaemia, causing the attack, and prompting us to call an ambulance.
Feb 2012
10:43am, 2 Feb 2012
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JohnnyO
You may have been shunting de-oxygenating blood from right to left which would could have left you with a limited maximum oxygen delivery (DO2 max).
However, most PFOs are functionally closed in all but the most extreme circumstances and the effect is likely to be negligble.

Yours opened to allow passage of a clot. This usually occurs when somebody increases their 'right sided pressures' (eg when coughing or sneezing, or running a marathon- being acidotic and stressed). If it were open all the time, you would have had a lot more strokes and been significantly bluer than most people.
1.5cm is pretty big.
Feb 2012
12:42pm, 2 Feb 2012
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Frobester
Excellent, that's very clear thanks Johnny.

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