fossa ovalis


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fos·sa o·va·'lis

1. [NA], an oval depression on the lower part of the septum of the right atrium; it is a vestige of the foramen ovale, and its floor corresponds to the septum primum of the fetal heart; Synonym(s): oval fossa
2. Synonym(s): saphenous opening

fossa ovalis

(1) Elliptical recess of vestible; recessus ellipticus vestibuli [NA6]. 
(2) Fossula of vestibular window; fossula fenestrae vestibuli.
(3) Saphenous hiatus; hiatus saphenus [NA6].

fos·sa o·va·lis

(fos'ă ō-vā'lis)
1. [TA] An oval depression on the lower part of the septum of the right atrium; it is a vestige of the foramen ovale, and its floor corresponds to the septum primum of the fetal heart.
2. Synonym(s): saphenous opening.
References in periodicals archive ?
4] Most tumours are found in the atria, with 75% originating from the fossa ovalis region of the left atrium.
It commences from dorsum of foot, passes in front of medial malleolus straight up to posteromedial aspect of the knee joint, one hand breadth posterior to patella and then up to the fossa ovalis or saphenous opening (4 cm below and lateral to pubic tubercle) where it enters the femoral vein.
2 Another technique for placement of a LA pressure monitoring line is described in which, following repair of a complex congenital heart defect, a long catheter previously advanced from the femoral vein into the right atrium is inserted across the interatrial septum through the patent foramen ovale or through a small incision in the atrial septum at the level of the fossa ovalis.
During right atriotomy, it was observed that there was a fossa ovalis type 1 x 2 cm ASD and the right pulmonary veins were combined and drained into the vena cava inferior by way of a truncal vein.
The transseptal sheath/dilator was placed in the superior vena cava and then the dilator, sheath and needle combination was withdrawn inferiorly in the PA projection until the tip of the dilator "popped" into the fossa ovalis.
In the case of our patient, a cascade of events led to the development of the groin abscess: a Richter's type hernia with part of the caecum and the appendix was created, which subsequently became strangulated; this led to perforation of the caecal wall, which allowed the enteric content to travel through the femoral ring and fossa ovalis into the subcutaneous planes, where the abscess was established.
A thrombus was attached to the right atrial side of the catheter at the area of the fossa ovalis.
8) It has been theorized that in patients with both ASA and PFO, motion of the fossa ovalis membrane may promote paradoxical shunting by enhancing the preferential orientation of blood flow from the inferior vena cava toward the foramen ovale.
All superficial inguinal nodes and the deep femoral nodes on the anterior and medial surfaces of the femoral vein within the fossa ovalis were removed en bloc while sparing the fascia lata and the cribriform fascia over the femoral artery.