sinus venosus

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sinus ve·no·sus

The first chamber in the heart of fish, amphibians, reptiles, and the embryos of birds and mammals, which receives blood from the veins and contracts to force the blood into the atrium.

[New Latin sinus vēnōsus : Medieval Latin sinus, sinus + Latin vēnōsus, venous.]
References in periodicals archive ?
It was performed on a patient suffering from an atrial septal defect (ASD) of the type (Sinus Venosus ASD) by a team headed by Dr Salim al Maskari, NHC director and senior consultant of Cardiology and Dr Abdullah al Farqani, senior consultant of cardiac catheterisation in collaboration with anaesthesiologists, cardiologists and nursing staff.
kind, to close the Sinus Venosus ASD rather than the surgical
Abbreviations: a: atrium; ca: conus arteriosus; e: epaxial muscles; h: hipaxial muscles; ha: hemal arch; hs: horizontal septum; m: spinal medulla; na: neural arch; o: oesophagous; p: pancreas; pi: proximal intestine; r: rectum; s: stomach; sp: spleen; sv: sinus venosus; v: vertebral body; va: ventral aorta; ve: ventricle; vi: valvular intestine; vs: vertical septum.
Development of the superior vena cava system begins with the sinus venosus, the main venous formation in which 3 pairs of cardinal, umbilical, and vitelline veins are discharged.
INTRODUCTION: Cor triatriatum dexter, or partitioning of the right atrium (RA) to form a triatrial heart, is an extremely rare congenital anomaly that is caused by the persistence of the right valve of the sinus venosus. [1] The incidence of cor triatriatum is approximately 0.1% of congenital heart malformation.
(1) Some authors believe that the cause is congenital, owing to persistent vitelline veins and the sinus venosus. (1-3) Others believe them to be post-traumatic, iatrogenic or as a result of portal hypertension with varices caused by liver disease or infections.
All patients with isolated atrial septal defect (ostium secundum, ostium primum and sinus venosus with or without partial anomalous pulmonary venous connection) were included.
A transesophageal echocardiogram demonstrated a sinus venosus atrial septal defect measuring approximately 20 mm in diameter (Figure 2).
However, when Red-Horse looked closely at the cells over time she found that about 11.5 days after conception, cells from an embryonic cardiac structure called the sinus venosus, which directs blood into the developing heart, began to migrate across the surface of the muscle.