Difference between revisions of "Heart valves"

Heart valves (view source)

165 bytes added , 14:01, 27 April 2012

48,830

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 **Myxomatous change?
-=Normal histology=
+=Normal morphology=
-===Aortic valve===
+==Aortic valve==
-General:
+===General===
 *Covered by endothelium.
 *Mostly avascular (nutrients supplied by diffusion).
+===Gross===
 Terminology:
 *Base - closest to the aortic wall.
 *Free edge - closest to the centre of the valve/interacts with other valve cusps.
+Cusps:
+*Left - has LMCA ostium.
+*Right - has RCA ostium.
+*Posterior (non-coronary cusp).
+===Microscopic===
 Three layers (from proximal (ventricular side) to distal (valsalva side)):<ref name=Ref_PBoD558>{{Ref PBoD|558}}</ref>
 #Ventricularis.
@@ Line 58: / Line 65: @@
 *The loading of the ventricular aspect is tensile and the valsalva side compressive. Thus, it makes sense that the tissue on the ventricular aspect is good in tensile loading and the tissue on the valsalva side good in compression.  The elastic tissue can be thought of as [http://en.wikipedia.org/wiki/Rebar rebar]... the collagen as concrete.
-===Mitral valve===
+==Mitral valve==
 ===Gross===
 *Cordae tendinae.
@@ Line 64: / Line 71: @@
 **No fusion.
-===Histology===
+===Microscopic===
-*Similar to the aortic valve.
+Similar to the aortic valve - layers:
+#Atrialis.
+#Spongiosa.
+#Fibrosa.
 =Degenerative conditions=