open access

Vol 69, No 1 (2010)
ORIGINAL ARTICLES
Published online: 2010-03-09
Submitted: 2012-02-06
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Anatomy of the supraventricular crest in human hearts

N. Wafae, D. Menegucci, G. Cavallini Wafae, C.R. Ruiz
Folia Morphol 2010;69(1):42-46.

open access

Vol 69, No 1 (2010)
ORIGINAL ARTICLES
Published online: 2010-03-09
Submitted: 2012-02-06

Abstract

The supraventricular crest is a fleshy trabecula of the right ventricle that has an important function in guiding the blood flow. However, controversy persists regarding its anatomical constitution. In this study, we aimed to investigate its frequency, formation, termination, morphometry, and relationships with the septomarginal trabecula, septal papillary muscle, right atrioventricular ring, and left posterior semilunar valve of the pulmonary trunk valve. Our material consisted of 50 hearts from adult individuals of both sexes that had been preserved in 10% formalin. They were opened along the arterial cone by means of an incision starting at the pulmonary trunk and ending at the right margin. The supraventricular crest was always present. The marginal (right) extremity was formed by two to six muscle bundles that joined together (88%). On the septal (left) side, the single muscle bundle penetrated the interventricular septum directly (88%) or by means of two or three divisions (12%). It could form a septal band (52%) and could pass over the septal papillary muscle (43.5%) or just below it (34.8%). There was a relationship of muscle fibres between these two structures in 64% of cases. Dissection of the septal band demonstrated continuity with the septomarginal trabecula (46%). In 80% of cases, the crest was connected to the right atrioventricular ring and it participated in its outline directly (64%) or by means of muscle expansions (16%). Its muscle fibres bordered the left semilunar valve of the pulmonary valve in 50% of cases. Regarding morphometry, we observed that the length varied little with increasing weight of the heart (22.6%), but the height and width increased markedly with increasing weight of the heart.
Folia Morphol 2010; 69, 1: 42-46

Abstract

The supraventricular crest is a fleshy trabecula of the right ventricle that has an important function in guiding the blood flow. However, controversy persists regarding its anatomical constitution. In this study, we aimed to investigate its frequency, formation, termination, morphometry, and relationships with the septomarginal trabecula, septal papillary muscle, right atrioventricular ring, and left posterior semilunar valve of the pulmonary trunk valve. Our material consisted of 50 hearts from adult individuals of both sexes that had been preserved in 10% formalin. They were opened along the arterial cone by means of an incision starting at the pulmonary trunk and ending at the right margin. The supraventricular crest was always present. The marginal (right) extremity was formed by two to six muscle bundles that joined together (88%). On the septal (left) side, the single muscle bundle penetrated the interventricular septum directly (88%) or by means of two or three divisions (12%). It could form a septal band (52%) and could pass over the septal papillary muscle (43.5%) or just below it (34.8%). There was a relationship of muscle fibres between these two structures in 64% of cases. Dissection of the septal band demonstrated continuity with the septomarginal trabecula (46%). In 80% of cases, the crest was connected to the right atrioventricular ring and it participated in its outline directly (64%) or by means of muscle expansions (16%). Its muscle fibres bordered the left semilunar valve of the pulmonary valve in 50% of cases. Regarding morphometry, we observed that the length varied little with increasing weight of the heart (22.6%), but the height and width increased markedly with increasing weight of the heart.
Folia Morphol 2010; 69, 1: 42-46
Get Citation

Keywords

anatomy; human hearts; supraventricular crest; morphology; circulatory system

About this article
Title

Anatomy of the supraventricular crest in human hearts

Journal

Folia Morphologica

Issue

Vol 69, No 1 (2010)

Pages

42-46

Published online

2010-03-09

Bibliographic record

Folia Morphol 2010;69(1):42-46.

Keywords

anatomy
human hearts
supraventricular crest
morphology
circulatory system

Authors

N. Wafae
D. Menegucci
G. Cavallini Wafae
C.R. Ruiz

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