"Boundaries "
"Size "
"Chiari network"
"Ebstein anomaly"
Expected headings
"Boundaries "
"Parts"
"Openings"
"Relations"
"Practical points"
"Size "
"Ultrasound"
"Echocardiography"
"The right atrium (RA) (plural: atria) is one of the four chambers of the human heart and receives deoxygenated blood from the two venae cavae and the coronary sinus. Outflow is through the tricuspid valve into the right ventricle (RV). The sinoatrial (SA) node lies at the junction of the superior vena cava (SVC) and the right atrium, and is the main pacemaker of the heart."