The internodal atrial myocardium

The Anatomical Record
R H AndersonA E Becker

Abstract

The anatomical substrates of internodal conduction have long been a contentious topic. Debated first by the German Pathological Society in 1910, the consensus of established opinion for over half a century was that conduction between sinus and atrioventricular nodes occurred through plain myocardium. This was a conclusion supported by Truex in 1961. Despite his restatement of this fact in 1976, it has become fashionable to describe internodal conduction as being mediated by specialized internodal pathways. To reinvestigate this problem we studied 22 human fetal and 32 human infant hearts. In each case it was possible to cut the atrial tissues as a single block of tissue and to examine serial sections through the internodal myocardium. The sinus node, atrioventricular node, and segments of atrioventricular ring specialized tissue were recognized as specialized tissue using the light microscope in each heart. In contrast, there was nothing "special" about the myocardium between the nodes, nor was it possible to recognize tracts on the basis of either histological appearance or cellular architecture. It is concluded that, from the standpoint of light microscopy, there is no evidence whatsoever to support the purported concept of s...Continue Reading

References

Jan 1, 1979·British Heart Journal·K R AndersonR H Anderson
Aug 1, 1979·The American Journal of Cardiology·B F Hoffman
May 1, 1967·The Anatomical Record·R C Truex, M Q Smythe
Dec 1, 1967·The Anatomical Record·R C TruexM J Taylor
Mar 1, 1959·The American Journal of Physiology·A P DE CARVALHOB F HOFFMAN

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Citations

Mar 29, 2000·The Anatomical Record·D SedmeraR H Anderson
Sep 1, 2000·The Anatomical Record·R H AndersonA E Becker
Nov 18, 2003·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Yuko SatoYasuhiro Shimada
Jan 1, 1991·Cardiology in the Young·R H AndersonA E Becker
Feb 1, 1993·Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft·C A Mandarim-de-Lacerda, W S Costa
May 13, 2008·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·S Y Ho, D Sánchez-Quintana
Nov 17, 2009·Journal of Cardiovascular Electrophysiology·Martin K StilesPrashanthan Sanders
Oct 1, 1983·International Journal of Cardiology·D R Thompson
Jan 1, 1988·Annals of the New York Academy of Sciences·S Y Ho, R H Anderson
Aug 4, 2016·Critical Care Nursing Clinics of North America·Alan KennedyJames McLaughlin
Dec 17, 2014·PloS One·Michael C BressanTakashi Mikawa
Dec 15, 2010·Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft·Tomokazu Kawashima, Hiroshi Sasaki
Jun 1, 1995·British Heart Journal·K WangR H Anderson
Dec 22, 2004·Journal of Cardiovascular Electrophysiology·Satoshi HigaShih-Ann Chen
Dec 22, 2004·Journal of Cardiovascular Electrophysiology·Suresh Singarayar, Jonathan M Kalman
Sep 8, 2018·Frontiers in Physiology·Robert S StephensonJonathan C Jarvis
Sep 9, 2020·Journal of Cardiovascular Electrophysiology·Norman C WangSamir Saba

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