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Right Atrium
Right Ventricle
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Right Atrium
Right Atrial Appendage Coronary Sinus Ostium Crista Terminalis Fossa Ovalis Inverior Vena Cava Ostium Interatrial Septum Lateral Wall Triangle of Koch Tricuspid Valve

upper portion of right side of heart consisting of the sinus venosus and the right atrial appendage; contains the sinoatrial node

returns deoxygenated blood from the body to the right ventricle

Importance in cardiovascular diseases:
atrial arrhythmias; dilated in tricuspid stenosis and tricuspid regurgitation; congenital defects (e.g., patent foramen ovale, atrial septum defects)

Importance in device delivery:
alternate and dual-site pacing to prevent atrial fibrillation


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