Talk:Aortic stenosis

message: This section should be moved to it's own page, or a subpage here. Dlodge 23:54, 11 January 2007 (UTC)
thread_title: Area calculation

message: It would be useful to put a comparison of aortic sclerosis and stenosis in this article, since they're heard in the same place but have different features and sequelae.  71.234.109.192 00:39, 15 October 2007 (UTC)
thread_title:  vs. sclerosis 

message: Folk, the equation Gradient = 4(velocity)2 mmHg 
is claimed to be a form of the Bernoulli equation, 
v2/2+gh+p/ρ=constant .  
This is my derivation.
The height term gh can be moved to the right hand side.
If height is assumed constant in the region of interest, a 
second constant appears.
v2/2+p/ρ=constant-gh=constant'
Multiplying by ρ yields,
(ρ/2)v2+p=ρ*constant' .
If ρ is also a constant, the right hand side is a third constant.
(ρ/2)v2+p=constant
Now we consider two points on a streamline denoted by subscripts 1 and 2. 
(ρ/2)v12+p1 
= constant=(ρ/2)v22+p2
Rearranging terms yields,
p1-p2 
= (ρ/2)(v22-v12) .
In some special cases, v12 will be negligible 
compared to v22.  For these cases this equation 
applies.
p1-p2 = (ρ/2)(v22)
The density of blood is approximately 1 gm/cm3.
pressure of 1 mm Hg = γ(pressure of 1 mm of water)
= γ(0.1 gm/cm3)980 cm/s2
= γ 98 gm/cm s2.
Ie. 1 = (pressure of 1 mm Hg)/(γ 98 gm/cm s2)
Substituting the density of blood, multiplying by 1 and simplifying yields
this equation.
p1-p2 = (v2 s/cm)2 (1 mm Hg pressure/2646)
If velocity is measured in cm/s, units inside the first pair of parentheses cancel
and the result is pressure drop in mm Hg.
If s/cm is replaced with s/0.01 m the this equation results.
p1-p2 = (v2 s/m)2 (1 mm Hg pressure/0.2646)
Equivalently,
p1-p2 = 3.8(v2 s/m)2 (1 mm Hg pressure)
This suggests that the equation in the article is intended for 
flow velocity measured in m/s.
I prefer to see this derivation rather than have the physiological 
equation simply quoted.  At the very least the latter should be 
stated correctly without the units fudged.  The terms "pressure 
gradient" and "pressure drop" should be used appropriately.
    PeterEasthope (talk) 00:12, 29 December 2007 (UTC)
thread_title:  Equation relating pressure drop and velocity 

message: No hope of modifying risk with cholesterol reduction: http://content.nejm.org/cgi/content/full/359/13/1343 JFW | T@lk 23:18, 24 September 2008 (UTC)
thread_title:  Medical treatment 

message: I'm not an expert, so I thought I'd run this by the group first. The first citation is a 404. Is this the appropriate new URL?
http://www.mountsinai.org/patient-care/health-library/diseases-and-conditions/aortic-stenosis
--Trakon (talk) 16:24, 31 August 2011 (UTC)
thread_title:  Sources 

message: Yes, where is the mention of it here? This article just deals with the calcification type stenosis, while the link in the bottom: http://www.gosh.nhs.uk/medical-conditions/search-for-medical-conditions/aortic-valve-stenosis/aortic-valve-stenosis-information/ clearly indicates the inborn valve defect.--Triple5 (talk) 04:30, 8 May 2014 (UTC)
thread_title:  What about inborn aortic valve stenosis? 

message: NEJM doi:10.1056/NEJMra1313875 JFW | T@lk 21:54, 24 August 2014 (UTC)
thread_title:  Review 

message: There appears to be an error in line 10 of the second paragraph of this page.
I have found no evidence (by scopus database) nor online articles that "male sex" increases the risk or causes aortic stenosis.
Another point to be made is that "male sex" is a vague term.
If the intention was 'is higher in the male sex' then perhaps I stand corrected and shall defer to your judgment.
Iapteus (talk) 03:05, 30 August 2015 (UTC)
replies: text: Ref says more common in males  Doc James (talk · contribs · email) 04:14, 30 August 2015 (UTC)
thread_title:  Causes of Aortic stenosis  

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thread_title:  External links modified 

message: doi:10.1161/CIRCULATIONAHA.116.023997 JFW | T@lk 09:18, 29 November 2016 (UTC)
thread_title:  Medical treatment 

message: doi:10.1161/CIRCULATIONAHA.116.025457 JFW | T@lk 21:18, 15 May 2017 (UTC)
thread_title:  Role of stress testing in asymptomatic AS