Dextrocardia with situs solitus and inversion apex-basis axis in lesser anteater (Tamandua tetradactyla): case report

Abstract

Dextrocardia with situs solitus and inversion apex-basis axis in lesser anteater(Tamandua tetradactyla) -case report [Dextrocardia com ABSTRACTDextrocardia is a rare cardiac anomaly where the heart is situated on the right antimeres of the thorax. 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. The arterial system was filled with contrasted latex and the animals were fixed with 10% formaldehyde and a posterior dissection was done. The heart of an animal was found in right antimere with inversion of the base-apex axis. The right atrium was more developed then the left and the pulmonary veins arrived directly in the left ventricle. The main vases of the base were identified with some topographic alterations resulting in: aorta dorsal to the cava caudal vein, pulmonary artery dorsal and cranial to aorta, pulmonary veins ventral to the pulmonary artery, cava caudal vein in ventral plain and cava cranial vein in dorsal plan in relation to the other vessels. Internally there were four cardiac chambers, with absence of septal communication.

Radiographic pelvimetry in the Tamandua tetradactyla

“…In general, the literature on the species usually addresses behavioral issues and management (MCDONALD et al, 2008), reproductive (HOSSOTANI et al, 2016), and anatomical studies (ROSSI et al, 2011;PINHEIRO et al, 2012;CARDOSO et al, 2013;MACEDO et al, 2013;PINHEIRO et al, 2014a;PINHEIRO et al, 2014b;PINHEIRO et al, 2014c;PINHEIRO et al, 2016;AZEVEDO, et al, 2018).…”

Situs inversus totalis EM RATO WISTAR

“…A alteração congênita Situs inversus é considerada rara, pouco relatada nos mamíferos, sendo definida pelo desenvolvimento dos órgãos no lado oposto de sua anatomia fisiológica (JERRAM et al, 2006;SALMAN et al, 2010;SHIRAIWA et al, 1995;SOUZA JUNIOR et al, 2011). Existem relatos de Situs inversus em uma gama imensa de espécies, entre elas, humanos, animais domésticos e silvestres (BAKER-COHEN, 1961;EVANS, 1987;JERRAM et al, 2006;KAYA et al, 2002;LARSEN;KIRK, 1987;NEIL et al, 2002;PINHEIRO et al, 2014;RIES;KÖNIG, 1988;SHIRAIWA et al, 1995;TURNER;JONES, 2004). A ocorrência desta alteração corresponde a 0,01-0,2% em ratos e 0,01-0,02% em humanos (JERRAM et al, 2006;SHIRAIWA et al, 1995), sem predisposição sexual (WILHELM; HOLBERT, 2015) e geralmente assintomática (SALMAN et al, 2010).…”