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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With the exception of the brachiocephalic trunk, which presented a more accentuated angulation than the normal one, no other variations regarding position or trajectory were observed Figure 1. It cannot be classified as a dextroversion case, as in the latter, the heart is located in the right hemithorax with the apex turned to the left antimere, different from what was observed in the present case 5,9 Figure 1. Only in XV century did the dextrocardia reports become more frequent, however only in dextrocarsia beings, a fact that restricted animal investigations.
The incidence of dextrocardia associated to situs inversus in the general population is usually 1: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. 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.
Views Read Edit View history. The cause of most birth defects is unknown, though genetics and environmental factors can play a role.
This article needs additional citations for verification. 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.
A population-based study of cardiac malformations and outcomes associated with dextrocardia. 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 aorta and the pulmonary trunk presented normal semilunar valves. A similar situation described in the literature and involving animals was only described by Castro et al. The two ventricles presented normal internal morphology, atrioventricular valves and vessel emergence. Birth Control Choices for Women.
Isolated dextrocardia with situs solitus (dextroversion).
What is amniotic band syndrome? The sternum was in its normal position. The dextrocardia with situs solitus in itself is not a common pathology in animals. Study Association This study is not associated with any graduation program. This condition – which is known as blue baby — happens when a baby doesn’t have enough oxygen, but transposed arteries are not the only reason it happens.
Differing from the normal animals, the vessels on the base of the heart of the animal with dextrocardia situs solitus and apex-basis inversion axis presented alterations. What is dextrocardia with situs solitus? Relato de caso-Anatomia de um caso de Dextrocardia com Situs Solitus. After that the animals had been radiographed and dissected, the aortic arch was removed after the sternum.
The transposition of the great arteries is one of the common abnormalities associated with dextrocardia.
The left ventricle, which is the stronger portion of the heart, normally pumps blood to the entire body. In the dextrocardic animal situs solitus with base-apex axis inversion the heart was removed by incision of the vessels of the basis.
Anatomy of a dextrocardia case with situs solitus
The diagnosis of dextrocardia can be attained during the physical examination, through an electrocardiogram or imaging examination 4. The diaphragm muscle was removed and subsequently, the liver was dissected, which presented normal aspect and morphology.
After the removal of the sternum and the dissection of the vessels of the base, it was observed that due to the rotation of the heart, its entire right portion was further displaced to the posterior part and this fact was so accentuated in the right auricle that, with the heart in the observed position, it was not possible to visualize it Figure 1. Internally, the heart from the dextrocardic animal did not show any significant alteration, and it was possible to observe four chambers without septal communication.
Meanwhile, the right ventricle, which normally destrocardia blood to the lungs, must pump blood to the rest of the body. The cases of dextrocardia reported in the literature normally describe multiple associated cardiac malformations.
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Anatomy of a dextrocardia case with situs solitus.
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. This malformation is caused by an anomalous rotation of the primitive heart tube to the left, in which the bulboventricular loop bends to the left, in a specular image of the normal condition, which occurs dexhrocardia the 8 th week of embryonic life 1,2. 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.
Potential Conflict of Interest No potential conflict of interest relevant to this article was reported. While prenatal tests can detect some birth defects, many are not found immediately. Cold Spring Harbor Soljtus in Biology. What kidney problems can occur in babies? The lesser anteater Tamandua tetradactila is a Xenartra from the Myrmecophagidae family.
In dextrocardia with situs solitus, a congenital condition, the heart is on the right side of the chest, but all of the other internal organs are in their normal positions. There is great discordance among authors regarding the classification of the several types of dextrocardia 1,