This study had the objective of describing a case of dextrocardia with situs solitus and apex-basis axis inversion in a lesser anteater (Tamandua tetradactyla). Arq Bras Cardiol. Dec;91(6):e Anatomy of a dextrocardia case with situs solitus. Faig-Leite FS(1), Faig-Leite H. Author information: (1)Universidade. Herz. May;35(3) doi: /s Epub May Isolated dextrocardia with situs solitus (dextroversion). Solzbach U(1).

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Can Med Assoc J. The transposition of the dextrocardix arteries is one of the common abnormalities associated with dextrocardia. A large ductus arteriosus was found, as well as the anomalous position of the right portion of the heart.

Such alterations had not been found in this animal because the heart presented an apex-based rotation axis.

Situs solitus

The cause of most birth defects is unknown, though genetics and environmental factors can play a role. Both cases, as in the present one, constituted necropsies of children younger than one year with a type of dextrocardia classified by the authors as dextrocardia with normally related great vessels.

This anomalous rotation of the heart made the pulmonary trunk emerge from the right ventricle abnormally, appearing much more superficial and extensive Figure 1.

Practical Clinical Points and Comments on Terminology. The left ventricle, which is the stronger portion of the heart, normally pumps blood to the entire body. Potential Conflict of Interest No potential conflict of interest relevant to this article was reported.

The main vases of the base were identified with some topographic alterations resulting in: Cardiac malpositions; an overview based on study of sixty-five necropsy specimens. The heart of an animal was found in right antimere with inversion of the base-apex axis.

Our findings corroborate the named author, however, we did not find multiple malformations, only the shunting of pulmonary veins to the left ventricle as mentioned before. A case of dextrocardia with normal situs.

This affirmation is refuted by Aiello et al. Pereira II ; A. This study had the objective of describing a case of dextrocardia with situs solitus and apex-basis axis inversion in a lesser anteater Tamandua tetradactyla between five evaluated animals, all from the area of Mine Bauxite – Paragominas – Para.

Calcaterra et al 7studying several cases of dextrocardia, described one case with the same anatomical variations found in the present case; the authors, however, did not search for extracardiac alterations in the necropsies, thus not allowing a more detailed comparison with the present case.


The inspection of the heart and the vessels of the base of the heart did not disclose possible position alterations caused by the removal of the lungs.

Right-sided organs are the liverthe gall bladder and a trilobed lung as well as the inferior vena cavawhile left-sided organs are the stomachsingle spleena bilobed lung, and the aorta.

This condition was not found in the studied animal because there is no communication between the pulmonary artery and the aorta.

Isolated dextrocardia with situs solitus (dextroversion).

Differing from the normal animals, the sllitus on the base of the heart of the animal with dextrocardia situs solitus and apex-basis inversion axis presented alterations. This infirmity can occur separately situs solitus or in association with situs inversus complete inversion of all visceral organs presenting itself as an inverted image Da Silva et al.

After this phase, the heart was then carefully removed from its place and again inspected with a magnifying glass.

Retrieved from ” https: The cases of dextrocardia reported in the literature normally describe multiple associated cardiac malformations.

Its treatment by coronary angioplasty by the brachial approach. The two cases described by these authors presented severe pulmonary alterations; as the lungs had been previously removed in the present case, it was not possible to study them. All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License.

Doctors would notice this condition as soon as a baby is born because the infant’s skin color looks bluish.

Brain asymmetry Dual brain theory Bicameralism. The thorax of the anatomical piece was partially dissected, without the presence of the pericardium and the lungs. By using this site, you agree to the Terms of Use and Privacy Policy. This diversity seems to be caused by the difficulty to establish criteria for a perfect classification Unsourced material may be challenged and removed. The abdominal cavity was open and the position of the viscera was normal, without any type of alteration, which characterized situs solitus.

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Relato de caso-Anatomia de um caso de Dextrocardia com Situs Solitus. Although much of humans’ external anatomy is bilaterally symmetricmany internal structures must be signaled to develop asymmetrically in order to form the normal situs solitus orientation.

Anatomy of a dextrocardia case with situs solitus. In Brazil it spreads out in the Amazon, Atlantic forest, southern fields and pantanal.

What is dextrocardia with situs solitus? | Birth Defects – Sharecare

In the present study, it is noteworthy the fact that a complete specular image of the heart and the vessels of the base of the heart was not found. After that the animals had been radiographed and dissected, the aortic arch was removed after the sternum. Recebido em 31 de julho de Aceito em 7 de maio de For instance, different levels of NODAL proteins on opposite sides of the embryo have been linked to proper bending of the embryonic heart, giving it its asymmetrical form.

Situs solitus is the normal position of thoracic and abdominal organs. Learn more about Birth Defects. Services on Demand Journal. The cava veins, superior and inferior, are on the right atrium that is located to the left of the vertebral column, while the aorta is below on the right. The case presented here is more uncommon as it was associated to situs solitus and for the fact that it did not present these types of malformation, which allows us to state that this variant of heart position is not necessarily associated to anomalies in atrioventricular communications, in the relations between the heart and its afferent and efferent vessels or even in the heart function.

This page was last edited on 8 Januaryat The aorta was dorsally located to the cava caudal vein, the pulmonary artery was cranial and dorsal to the aorta, the pulmonary veins in number ofthree were ventral to the pulmonary artery, the cava caudal vein placed in the ventral plane and the cava cranial vein in the dorsal plane, both in relation to the other vessels Figure 1 C and 2 A and B.