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...

humans, the heart is divided into four chambers: upper left and right atria and lower left and right ventricles. Commonly, the right atrium and ventricle...

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...

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

(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...

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...

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...

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...

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...

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...

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...

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

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

electrical activation of the left atrium. It is therefore considered to be part of the "atrial conduction system" of the heart. In 1916, Jean George Bachmann...

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...

A heart transplant, or a cardiac transplant, is a surgical transplant procedure performed on patients with end-stage heart failure or severe coronary artery...

various nerves and veins A synonym for atrial, of or pertaining to the atrium (heart) Auricular style, a 17th-century style in decorative art, especially...

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...

subclavian. From this entry site, it is threaded through the right atrium of the heart, the right ventricle, and subsequently into the pulmonary artery...