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===Atrioventricular node=== | ===Atrioventricular node=== | ||
Approach 1: | Approach 1 (Peter method): | ||
*Open the LVOT - if it hasn't been opened yet. | *Open the LVOT - if it hasn't been opened yet. | ||
*Cut a section of that includes the right coronary cusp (of the aortic valve) and about 1.5 cm below it (this has the membranous septum and the superior muscular septum).<ref>PF. August 21, 2009.</ref> | *Cut a section of that includes the right coronary cusp (of the aortic valve) and about 1.5 cm below it (this has the membranous septum and the superior muscular septum).<ref>PF. August 21, 2009.</ref> | ||
**This section should then be serially sectioned in the axis of the VLOT. | **This section should then be serially sectioned in the axis of the VLOT. | ||
Approach 2: | Approach 2 (Virmani method): | ||
#View from right atrium: AV node is between the ''coronary sinus'' and ''membranous septum''. | #View from right atrium: AV node is between the ''coronary sinus'' and ''membranous septum''. | ||
#View from LVOT: Inferior to the posterior (non-coronary) cusp of the aortic valve. | #View from LVOT: Inferior to the posterior (non-coronary) cusp of the aortic valve. | ||
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#**This section should then be serially sectioned in the axis of the VLOT. | #**This section should then be serially sectioned in the axis of the VLOT. | ||
Approach 3: | Approach 3 (Location by triangle of Koch): | ||
*Atrioventicular (AV) node is in the '' | *Atrioventicular (AV) node is in the ''triangle of Koch''. | ||
Triangle of Koch according to Virmani<ref name=virmani_p17>Virmani et al. Cardiovascular Pathology. 2nd Ed. 2001. P.17.</ref> is the ''floor of the RA'' and: | Triangle of Koch according to Virmani<ref name=virmani_p17>Virmani et al. Cardiovascular Pathology. 2nd Ed. 2001. P.17.</ref> is the ''floor of the RA'' and: | ||
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*Tricuspid valve annulus = "inferior". | *Tricuspid valve annulus = "inferior". | ||
*Coronary sinus = "posterior". | *Coronary sinus = "posterior". | ||
Notes: | Notes: |
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