Foramen Ovale and Ductus Arteriosus Botalli in Aquatic Mammals

Slijper, E.J.

doi:10.1515/mamm.1961.25.4.528

Cited by 12 publications

(12 citation statements)

References 13 publications

(15 reference statements)

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“…vitulina pups enter the water almost immediately after birth to avoid predation (Lyderson et al, 2002;Burns, 2009), diving to a mean depth of 2.1 m (Greaves et al, 2005). Similar findings of prolonged patency compared to terrestrial animals have been briefly reported in cetaceans (Slipjer, 1961). Slipjer's necropsy findings demonstrated that anatomic d.a.…”

Section: Discussionmentioning

confidence: 73%

Foramen Ovale and Ductus Arteriosus Patency in Neonatal Harbor Seal (Phoca vitulina) Pups in Rehabilitation

Dennison¹,

Boor²,

Fauquier³

et al. 2011

Aquat Mamm

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Twenty neonatal harbor seal (Phoca vitulina) pups in rehabilitation following maternal separation underwent serial echocardiographic studies to assess patency and subsequent age of functional closure of the ductus arteriosus (d.a.). B-mode, color-flow Doppler, and pulse and continuous wave Doppler were utilized to identify the d.a. and determine patency and directionality of blood flow. Seals were also evaluated for evidence of foramen ovale (f.o.) patency. B-mode ultrasound was used to evaluate the inter-atrial septum for abnormal (aneurismal) motion, a sign of f.o. patency in other species. In one harbor seal, this motion was confirmed as being consistent with f.o. patency by contrast echocardiography. Closure of the f.o. was not confirmed in any harbor seal prior to release back into the free-ranging population.Data acquired indicate that there is patency of the f.o. and d.a. after birth for a longer period in phocids than in described terrestrial mammals.

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Section: Discussionmentioning

confidence: 73%

Foramen Ovale and Ductus Arteriosus Patency in Neonatal Harbor Seal (Phoca vitulina) Pups in Rehabilitation

Dennison¹,

Boor²,

Fauquier³

et al. 2011

Aquat Mamm

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“…The pulmonary veins in the roof of the left atrium also seem to be arranged in a way that facilitates the flattening of the tissue fold over the foramen. Despite this, however, there are reports of studies in the common seal (Phoca vitulina) which indicate that the foramen ovale of about 75 % of suckling pups may be open during the first 2-3 months of neonatal life (Rapp, 1837;Slijper, 1936Slijper, , 1961Van Nie and van der Kamp 1988). Why this should be is unclear.…”

Section: Discussionmentioning

confidence: 99%

“…Accounts of the anatomy of the ducti venosus and arteriosus of the seal have been given earlier (Owen, 1831 ;Hepburn 1909;Haig 1914;Slijper, 1936Slijper, , 1961. However, although the gross structure of the foramen ovale of a number of domestic and other terrestrial mammals has been commented upon (Mosca 1914;Amoroso et al 1942;Franklin et al 1942;Macdonald 1988;Macdonald et al 1988), there are very few descriptions of this structure in aquatic mammals (Slijper 1961). There are brief reports relating to the foramen ovale of pinnipeds in the early literature, indicating that it had been given some attention.…”

Section: Introductionmentioning

confidence: 99%

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Comparative anatomy of the cardiac foramen ovale in the Pinnipedia

Macdonald¹,

Dixon²,

Boyd³

1995

Can. J. Zool.

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The structure of the cardiac foramen ovale from eight genera of pinnipeds was studied using the scanning electron microscope. Specimens were obtained from fetuses or neonates of the Californian sea lion (Zalophus californianus), Antarctic fur seal (Arctocephalus gazella), walrus (Obenus rosmurus), grey seal (Halichoerus gryphus), ringed seal (Phoca hispida), bearded seal (Erignathus barbatus), Weddell seal (Leptonychotes weddelli), and crabeater seal (Lobodon carcinophagus). In each species, the structure that permits oxygenated blood from the placenta flowing in the caudal vena cava to pass directly into the left side of the heart, the foramen ovale, when viewed from the terminal part of the caudal vena cava had the appearance of the entrance to a short tunnel. A thin fold of tissue, the developed remains of the septum primum, projected from the caudal edge of the foramen ovale into the lumen of the left atrium. It constituted about 75% of the inner surface of the tunnel, and was generally unfenestrated. The wall of the interatrial septum contributed the "floor." The distal end of the tunnel was straight-edged. In most cases the septum primum was long enough to cover the foramen ovale. The siting of pulmonary veins in the roof of the left atrium appeared to be such that drainage from them after birth would press the septum primum over the foramen opening, thereby functionally closing it. Collapses of the tunnel was seen in all the neonatal seals, and in the 1-month-old neonate the fold of tissue was anchored to the interatrial septum along the surface of the crista dividens, which lay in the left atrium. Cellular protrusions and thread formation may play a role in the closure of the foramen ovale.RCsumC : La structure du foramen ovale a Ct C CtudiCe au microscope Clectronique h balayage chez huit genres de pinnipkdes. Les organes not Ct C prClevCs chez des fCtus ou des nouveau-nCs de l'Otarie de Californie (Zalophus californianus), de I'Otarie de Kerguelen (Arctocephalus gazella), du Morse (Odobenus rosmurus), du Phoque gris (Halichoerus gryphus), du Phoque annelC (Phoca hispida), du Phoque barbu (Erignathus barbatus), du Phoque de Weddell (Leptonychotes weddelli) et du Phoque crabier (Lobodon carcinophagus). Vu de la partie terminale de la veine cave postdrieure, le foramen ovale, structure qui permet au sang oxygCnC provenant du placenta par la veine cave de passer directement dans la partie gauche du coeur, a l'apparence de I'entrCe d'un tunnel court chez chacune des espkces. Un mince repli de tissu, vestige du septum primaire, est issu de la bordure caudale du trou et se prolonge jusque dans la lumittre de l'oreillette gauche. Ce repli constitue environ 75% de la surface interne du tunnel et ne comporte gCnCralement pas de pores; la paroi du septum interatrial constitue le N plancher ,,. Le bord distal du "tunnel" est droit. Dans la plupart des cas, le septum primaire est suffisamment long pour couvrir le foramen ovale. La position des veines pulmonaires dans le plafond de l'oreillette gauche permet de suppo...

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“…The few cases of heart disease reported in cetaceans include infections (Guzmán-Verri et al 2012), parasites (Jardine & Dubey 2002), and malformations (Slijper 1961, Gray & Conklin 1974, Neurohr 1982, Troncone & Zizzo 1994, Powell et al 2009). Bossart et al (2007) reported cases of myocardial degeneration and moderate myocarditis in stranded sperm whales (Kogia spp.…”

Section: Introductionmentioning

confidence: 99%