WordNet
n. the right upper chamber of the heart that receives blood from the venae cavae and coronary sinus [syn: right atrium of the heart, atrium dextrum]
Usage examples of "right atrium".
He held the tube steady with one hand as he lifted the elbow, and with a little manipulation the tube slipped through, into the right atrium of the heart.
The map had routed him out of this pressed tunnel through the inferior vena cava to the right atrium and thence through the right ventricle, the pulmonary arteries, through the valves, to the lungs, the pulmonary veins, crossover to the left side of the heart (left atrium, left ventricle), the aorta--bypassing the three coronary arteries above the aortic valves--and down over the arch of the aorta--bypassing the carotid and other arteries--to the celiac trunk, where the arteries split in a confusing array: the gastroduodenal to the stomach, the hepatic to the liver, the splenic to the spleen.
The early ones diverted the accumulated CSF into a vein in the neck, then into the right atrium of the heart.
Were coming to the right atrium, and we should see the mitral valve.