The vascularization of the cardiac conduction system is a topic frequently mentioned and scarcely photographed, the purpose is to demonstrate in pictures the irrigation of the right and left branch of the His bundle ( atrioventricular junctional tissue ) by the superior septal branch of the right coronary artery.Material and MethodTwenty fresh human hearts were perfunded with Microfil ® with the method and dissection previously published by our group.ResultsWe demonstrate with photographs the irrigation of the cardiac conduction system by the right coronary artery in our cases.ConclusionsThis would explain the variation in presentation of the AV block associated with the acute myocardial infarction with the oclusion of the right coronary artery in its origin or near. The importance of this vessel is relevant in Ross technique and other cardiac surgery procedures.
The Commerson's dolphin (Cephalorhynchus commersonii) is an odontocete cetacean specie that lies in the waters of the southern hemisphere. With the aim of studying the course and distribution of Cephalorhynchus commersonii's coronary arteries, an exhaustive heart dissection was performed on one specimen. To the extent of our knowledge, and basing upon an extensive bibliographic research on the commersonii species, this is the first reported description of a Commerson's dolphin heart anatomy. Despite the fact that the analysis of a unique specimen does not allow to establish final conclusions, comparisons reveal broad similarities between Cephalorhynchus commersonii's coronary distribution and previous anatomical studies describing the heart of various marine diving mammals and the human fetus circulation. Diving mammals have developed an anastomotic system along evolution, in order to adjust their bodies to diving imposed conditions, and minimize the oxygen demand of the heart muscle. The present work begins with the identification of the patterns and similarities between Commerson's dolphin heart anatomy when compared to other odontecete species, to continue with an exhaustive description of the Commerson's dolphin coronary anatomy.
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