Anatomical Basis for the Cardiac Interventional Electrophysiologist

Figure 13

(a) The right side of the heart is opened to show the hinge of the tricuspid valve and the location of the right papillary muscles and leaflets of the tricuspid valve. (b) The right ventricle is opened from the front to show the septal papillary muscle, moderator band, and septoparietal trabeculations. (c) Window dissection of the right heart to show the AV node and right bundle branch crossing the central fibrous body (). (d) Histological section of the septal papillary muscle (double-headed black broken line). Note the close relationship with right bundle branch of His. Ao = aorta, APM = anterior papillary muscle, CSO = coronary sinus ostium, IPM = inferior papillary muscle, OF = oval fossa, RVOT = right ventricle outflow tract, SC = supraventricular crest, SCV = superior cava vein, SMT = septomarginal trabeculation, and SPM = septal papillary muscle.

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