Fine structure of cells and their histologic organization within internodal pathways of the heart: Clinical and electrocardiographic implications
| Autor: | Thomas N. James, Libi Sherf |
|---|---|
| Rok vydání: | 1979 |
| Předmět: |
Pathology
medicine.medical_specialty Cell Neuromuscular Junction Cell junction Neuromuscular junction Membrane Potentials Electrocardiography Purkinje Cells Dogs Myofibrils Heart Conduction System Terminology as Topic Animals Humans Medicine Heart Atria medicine.diagnostic_test business.industry Arrhythmias Cardiac Anatomy Atrial Function Atrioventricular node Organoids Microscopy Electron Intercellular Junctions medicine.anatomical_structure Atrioventricular Node Transitional Cell Electrical conduction system of the heart Cardiology and Cardiovascular Medicine business Myofibril |
| Zdroj: | The American Journal of Cardiology. 44:345-369 |
| ISSN: | 0002-9149 |
| DOI: | 10.1016/0002-9149(79)90327-8 |
| Popis: | The fine structure of the normal internodal pathways was studied in 1 human and 2 canine hearts and correlated with histologic observations on more than 100 human and 10 canine hearts. From the electron microscopic studies six different kinds of myocardial cells were classified from two locations: the Eustachian ridge (posterior internodal pathway) and the Bachmann bundle (anterior internodal pathway). Five of the six kinds of cells (working myocardial cells, Purkinje-like cells, either broad or slender transitional cells and P cells, all previously described) were present in both locations. A sixth cell, pleomorphic and dark in appearance, with a special intertwined relation to P cells, is newly designated as an ameboid cell. It was found solely in the Eustachian ridge. In the same area a rare direct contact between a nerve and a myocardial cell was observed. The importance of these different kinds of cells, their respective cell connections, and their topographic locations inside the internodal pathways are discussed relative to certain functions such as rapid conduction and subsidiary pacemaking. The possible influence of these factors on clinical electrocardiographic changes is considered. |
| Databáze: | OpenAIRE |
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