Skip to main content
. Author manuscript; available in PMC: 2011 Oct 19.
Published in final edited form as: J Am Coll Cardiol. 2010 Oct 19;56(17):1386–1394. doi: 10.1016/j.jacc.2010.03.098

Figure 4. Functional and structural features of the human SAN #1.

Figure 4

Panels A and C - Two perpendicular perspectives of the human SAN preparation (#1) including anatomical (arteries – blue lines, SAN – red outline) and functional (SEPs – purple arrows, leading pacemaker site – purple dot, breakthrough sites – magenta dots) features. Grey dashed lines represent location of histology sections shown in Panel B and had the same perpendicular orientation as in Panel C.

Panel B - A series of representative histology slide images that trace the locations of the arteries (blue) and the SAN (red) from superior to inferior ends of the SAN.