Idiopathic Enlargement of the Right Atrium

Giant Right Atrium in an Adult: Case Report of a Rare Condition

“…This case represents one of the largest cases of giant right atrium reported in an adult. Siagusa et al described a giant RA in a paediatric case where its size was reported to be as large as "the head of a child" [1] Idiopathic dilatation of the right atrium was first described by Bailey [2]. Congenital malformation of the right atrium is frequently an incidental finding after recognition of an enlarged cardiac silhouette during routine chest radiography or after evaluation for atrial arrhythmia.…”

Giant left and right Atrium in rheumatic mitral stenosis and tricuspid regurgitation

“…[1] Giant RA in adults[2345] must be differentiated from idiopathic right atrial aneurysm. [6] The most common causes of enlarged RA in adults are chronic pulmonary disease, severe mitral valvular abnormalities with pulmonary hypertension, pulmonary emboli, and tricuspid valvular abnormalities.…”

Unusual Giant Right Atrium in Rheumatic Mitral Stenosis and Tricuspid Insufficiency

“…Massive enlargement of the right atrium is usually associated with congenital heart disease in infants and children [5, 6]. In the literature, there are only few cases of giant right atrium in adults [2, 7–9], which must be differentiated from idiopathic right atrial aneurysm [10].…”