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| Bundle of His |
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| Bundle of His
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•This is a Masson trichrome stain marking fibrous tissue blue
and muscle light red.
•The bundle of His (arrow) is in the membranous portion of
interventricular septum, which is part of the cardiac
skeleton. The atrial and ventricular septums are on the left
and right, respectively. The bundle is modified myocardium.
•The loose valve structure below the atrial septum is the
tricuspid valve.
| | (Description By:J. Hasson, M.D. )
| | (Image Contrib. by: UCHC )
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