Modern imaging technologies can now visualize internodal pathways as muscular bundles displaying sinoatrial node electrical waves traversing the atrial walls, resolving a century-long debate.
This report reexamines disparate historical views on internodal pathway existence and nature. The conflicting research, ongoing since 1963, regarding these issues, is appraised. The discovery of myocytes anisotropically structured in atrial bundles relaying sinoatrial node (SAN) action potentials (APs) to atrioventricular node (AVN) and atrial wall destinations is emphasized, since it is still a relatively unfamiliar subject in physiology teaching. Modern imaging technologies can now visualize internodal pathways as muscular bundles displaying SAN electrical waves traversing the atrial walls.
Cavero et al. (Thu,) conducted a review in Internodal conduction pathways. Modern imaging technologies can now visualize internodal pathways as muscular bundles displaying sinoatrial node electrical waves traversing the atrial walls, resolving a century-long debate.