The atrium (Latin: ātrium, lit. 'entry hall'; pl.: atria) is one of the two upper chambers in the heart that receives blood from the circulatory system...

referred together as the right heart and their left counterparts as the left heart. Fish, in contrast, have two chambers, an atrium and a ventricle, while most...

Look up Atrium or atrium in Wiktionary, the free dictionary. Atrium may refer to: Atrium (heart), an anatomical structure of the heart Atrium, the genital...

approaches the heart and finishes its growth on day 28. The conduit forms the atrial and ventricular junctions which connect the common atrium and the common...

depression in the right atrium of the heart, at the level of the interatrial septum, the wall between right and left atrium. The fossa ovalis is the...

and Atrium Health Floyd in the Rome, Georgia area. Atrium Health offers pediatric, cancer, and heart care, as well as organ transplants, burn treatments...

of the heart. It drains over half of the deoxygenated blood from the heart muscle into the right atrium. It begins on the backside of the heart, in between...

one of the four heart valves. It has two cusps or flaps and lies between the left atrium and the left ventricle of the heart. The heart valves are all...

(a type of hat). It is on the left side of the heart and allows the blood to flow from the left atrium into the left ventricle. During diastole, a normally-functioning...

of the heart to mix with the oxygen-poor blood in the right side of the heart; or the opposite, depending on whether the left or right atrium has the...

the ostium secundum of Born, allows blood to enter the left atrium from the right atrium. It is one of two fetal cardiac shunts, the other being the ductus...

the heart. The right atrium lies among the two venae cavae, behind and somewhat right of the sternum. It is right and anterior to the left atrium. It...

irregular heart rhythms including rhythms that are too fast or too slow. Electrical signals arising in the SA node (located in the right atrium) stimulate...

the heart that collect and expel blood towards the peripheral beds within the body and lungs. The blood pumped by a ventricle is supplied by an atrium, an...

to the heart. The largest pulmonary veins are the four main pulmonary veins, two from each lung that drain into the left atrium of the heart. The pulmonary...

left coronary artery distributes blood to the left side of the heart, the left atrium and ventricle, and the interventricular septum. The circumflex artery...

mammalian heart, at the superior portion of the right ventricle. The function of the valve is to allow blood to flow from the right atrium to the right...

the free dictionary. Atria may refer to: Atrium (heart) (plural: atria), an anatomical structure of the heart Atria (genus), a flatworm genus in the family...

blood directly into the right atrium. The main role of a sinoatrial node cell is to initiate action potentials of the heart that can pass through cardiac...

as an electrical impulse from a small area of tissue in the right atrium of the heart called the sinus node or sinoatrial node (SA node). The impulse initially...

puncture to permit catheter access from the right atrium to the left atrium; alternative access to the left heart would be retrograde through the aorta and across...

The primitive atrium is a stage in the embryonic development of the human heart. It grows rapidly and partially encircles the bulbus cordis; the groove...

deoxygenated blood from the lower and middle body into the right atrium of the heart. It is formed by the joining of the right and the left common iliac...

cycle by the heart. The first beat represents that atrial contraction (termed a) and second beat represents venous filling of the right atrium against a...

total: left atrium, left ventricle, right atrium and right ventricle. The right atrium is the upper chamber of the right side of the heart. The blood that...

restore sinus rhythm. The ganglionated plexi (autonomic ganglia of the heart atrium and ventricles) can also be a source of atrial fibrillation, and is sometimes...

The terminal sulcus is a groove on the outer surface of the right atrium of the heart marking the transition between the sinus venarum cavarum (which has...

valve, into the left atrium, when the left ventricle contracts. Mitral regurgitation is the most common form of valvular heart disease. Mitral regurgitation...

commonly obtained for the right atrium, right ventricle, pulmonary artery, and pulmonary capillary "wedge" pressures. Right heart catheterizations also allow...

begins with deoxygenated blood returned from the body to the right atrium of the heart where it is pumped out from the right ventricle to the lungs. In...