1. The Conduction System of the Swine Heart
Saroja Bharati, M.D., F.C.C.P., Marc Levine, M.D., Shoei K. Stephen Huang, M.D., Bruce Handler, M.D., Grant V.S. Barr, M.D., F.C.C.P., Robert Bauernfeind, M.D., Maurice Lev, M.D., F.C.C.P. 
CHEST 
Volume 100, Issue 1, Pages (July 1991)
DOI: /chest
Copyright © 1991 The American College of Chest Physicians Terms and Conditions

2. Figure 1
His bundle recording of the pig. Intervals: HRA-LRA=10 ms; LRA-H = 65 ms; H-V = 25 ms. HRA = high right atrium; HBE = His bundle electrocardiogram; A = atrial wave; H = His bundle spike; V = ventricular wave; and LRA = low right atrium.
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Copyright © 1991 The American College of Chest Physicians Terms and Conditions

3. Figure 2
Gross anatomy of the pig heart with diagrammatic outline of the course of the conduction system. (a, upper), Right atrial and right ventricular view. (b, lower), Left ventricular view. CS = coronary sinus; RA = right atrium; RV = right ventricle; N = AV node; BH = Bundle of His; RBB = right bundle branch; AO = aorta; LBB = left bundle branch; AR = anterior radiation; PR = posterior radiation; and LV = left ventricle.
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Copyright © 1991 The American College of Chest Physicians Terms and Conditions

4. Figure 3
Sinoatrial (SA) node (Weigert-Van Gieson stain ×30). A = atrial muscle; Ne = nerve fiber on periphery of SA node. Arrows point to SA node.
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Copyright © 1991 The American College of Chest Physicians Terms and Conditions

5. Figure 4
Approaches to the AV node and AV node (Weigert-Van Gieson stain ×45). Ap = approaches to the AV node; N = AV node. Arrows point to nerve fibers.
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Copyright © 1991 The American College of Chest Physicians Terms and Conditions

6. Figure 5
Bundle of His. (a, left), Weigert-Van Gieson stain x 45. (b, right), Holmes silver stain x 150. C = central fibrous body; V = ventricular muscle; B = bundle. Arrows point to nerve fibers.
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Copyright © 1991 The American College of Chest Physicians Terms and Conditions

7. Figure 6
(at left).Left bundle branch passing between conal and ventricular muscle (Gomori trichrome stain x 45). C = conal muscle; V = ventricular muscle. Arrows point to left bundle branch.
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Copyright © 1991 The American College of Chest Physicians Terms and Conditions

8. Figure 7
(below). Right bundle branch. (a, left), Weigert-Van Gieson stain × 150. (b. right), Holmes silver stain ×450. V = ventricular muscle; RBB = right bundle branch. Arrows point to nerve fibers.
CHEST  , DOI: ( /chest )
Copyright © 1991 The American College of Chest Physicians Terms and Conditions