open access

Vol 62, No 3 (2003)
SHORT COMMUNICATIONS
Published online: 2003-06-09
Submitted: 2012-02-06
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Provision of tricuspid valve leaflets by septal papillary muscles in the right ventricle of human and other mammal hearts

Damian Jeżyk, Janusz Jerzemowski, Marek Grzybiak
Folia Morphol 2003;62(3):309-311.

open access

Vol 62, No 3 (2003)
SHORT COMMUNICATIONS
Published online: 2003-06-09
Submitted: 2012-02-06

Abstract

Leaflets of the tricuspid valve are provided by tendinous cords extending from the papillary muscles. The situation is complicated with the septal muscles, which generally occur in two groups, one as constant musculus coni arteriosi and the second as other variable septal muscles. We tested whether there is a variability in the provision of the tricuspid valve in different taxonomical groups of mammals. The material examined consisted of 299 hearts of mammals (Primates, Ungulata, Carnivora, Lagomorpha, Rodentia, Marsupialia). The musculus coni arteriosi in the majority of mammals provided only the front leaflet, but among Ungulata and Rodentia it provided simultaneously the front and septal leaflet. The other septal muscles provided the front, septal and even back leaflets. The following regularity was observed: in the hearts of Primates provision of the front leaflet and the front part of the septal leaflet predominated, among Ungulata the muscles provided the middle part of the septal leaflet, but among the other mammals the rest of the septal muscles provided, significantly, the back part of the septal leaflet. Such a provision was characteristic for predators, hares, rodents and marsupials. These circumstances may allow the conclusion to be drawn that there is a taxonomical dependence in the provision of the tricuspid valve in the hearts of the mammals under examination.

Abstract

Leaflets of the tricuspid valve are provided by tendinous cords extending from the papillary muscles. The situation is complicated with the septal muscles, which generally occur in two groups, one as constant musculus coni arteriosi and the second as other variable septal muscles. We tested whether there is a variability in the provision of the tricuspid valve in different taxonomical groups of mammals. The material examined consisted of 299 hearts of mammals (Primates, Ungulata, Carnivora, Lagomorpha, Rodentia, Marsupialia). The musculus coni arteriosi in the majority of mammals provided only the front leaflet, but among Ungulata and Rodentia it provided simultaneously the front and septal leaflet. The other septal muscles provided the front, septal and even back leaflets. The following regularity was observed: in the hearts of Primates provision of the front leaflet and the front part of the septal leaflet predominated, among Ungulata the muscles provided the middle part of the septal leaflet, but among the other mammals the rest of the septal muscles provided, significantly, the back part of the septal leaflet. Such a provision was characteristic for predators, hares, rodents and marsupials. These circumstances may allow the conclusion to be drawn that there is a taxonomical dependence in the provision of the tricuspid valve in the hearts of the mammals under examination.
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Keywords

heart; tricuspid valve; septal papillary muscles

About this article
Title

Provision of tricuspid valve leaflets by septal papillary muscles in the right ventricle of human and other mammal hearts

Journal

Folia Morphologica

Issue

Vol 62, No 3 (2003)

Pages

309-311

Published online

2003-06-09

Bibliographic record

Folia Morphol 2003;62(3):309-311.

Keywords

heart
tricuspid valve
septal papillary muscles

Authors

Damian Jeżyk
Janusz Jerzemowski
Marek Grzybiak

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