| Normal Bundle of Hiss
|
Etiology
•N.A.
|
Pathogenesis
•N.A.,
|
Epidemiology
•N.A.
|
General Gross Description
•The bundle of His is not easily visible grossly,
because of its blending with adjoining tissues. It
extends leftward along the top of the interventricular
septum, from its beginning in the subendocardium of the
right side of the atrial septum just above the annulus
of the tricuspid valve. It branches after it reaches
the membranous septum into the right and left bundles.
•A section of the IV septum perpendicular to the course
of the bundle at the posterior edge of the membranous
septum may reveal a 2 mm tan cross section of the
bundle just above the septal myocardium surrounded
by the gray tissue of the membranous cardiac skeleton.
•Examples:
|
General Microscopic Description
•The Purkinje fibers of the Bundle on light microscopy
are individually indistinguishable from myocardial
fibers. They are easily identified, however, by their
smaller size and distinctly lighter staining when
compared with adjoining myocardial tissues.
•Examples:
|
Clinical Correlation
•N.A
|
References
• Histology for Pathologists. Sternberg SS ed. New York: Raven Press, 1992. pp. 226-227.
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| Normal Bundle of Hiss
| | Synopsis by: J. Hasson, MD (T32830M00100)[600]
| |