[HSF] re: Porcine vs pericardial for Hal and others

[hgrmd at aol.com]

Dear Zhadong,

? Though I don't have recent experience with it, I plan to?do my next root abscess with a stentless valve.


-----Original Message-----
From: zzhoumd at pol.net
To: OpenHeart-L at lists.hsforum.com
Sent: Wed, 2 Jan 2008 1:49 pm
Subject: Re: [HSF] re: Porcine vs pericardial for Hal and others





Now I have a patient with root abscess from enteroccocus. Which valve to use, 
homograft vs freestyle bentall?

Z Zhou


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-----Original Message-----
From: Ani Anyanwu <anianyanwu at hotmail.com>

Date: Wed, 2 Jan 2008 15:16:05 
To:<openheart-l at lists.hsforum.com>
Subject: RE: [HSF] re: Porcine vs pericardial for Hal and others


> > Ani,> Not to quibble, but the CCF paper you cited had more AI than AS as the 
> cause of failures in pericardial valves. > > Hal> 
 
Yes Hal which is why I said that the teaching pericardial fail by stenosis, 
porcine by regurgitation does not reflect the whole truth but only part of the 
truth. 
 
There is however an association. Just like with Bicuspid valves = aortic 
stenosis hypothesis. Most bicuspid valves will never be stenotic and most 
stenotic valves are not bicuspid but that does not mean stenosis is not a more 
frequent occurrence in bicuspid valves than tricuspid valves (as we know it is).
 
I will however say that our recollections are tainted by our biases. I suspect 
if you objectively looked at your data *on reop avrs* you would find very few 
cases where a porcine valve was replaced for pure stenosis (i.e. the integrity 
of the cusps was maintained). Now you have heard tom martin mention this you 
will probably start seeing the converse and noticing most porcine valves you 
explant *for structural degeneration* do calcify, leak and have torn cusps. 
Indeed part of the reason you may not have observed this is because your 
experience in rereplacing pericardial valves is comparatively limited compared 
to porcine (i think you have said in the past that you have only seen a handful 
of pericardial valves come back for degeneration, but done loads of porcine). 
Another thing possibly tainting your observation is your large volume mitral 
practice. These observations apply to the aortic position - in the mitral 
position it is rather different and porcine valves do also stenose.
 
Ani
 



> From: Hgrmd at aol.com> Date: Wed, 2 Jan 2008 07:31:44 -0500> Subject: Re: [HSF] 
re: Porcine vs pericardial for Hal and others> To: OpenHeart-L at lists.hsforum.com> 
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