Idiopathic enlargement of the right atrium

Dilatação Aneurismática Isolada do Átrio Direito, com Resolução Cirúrgica, em Adulta de 53 Anos

“… 5 Acrescenta-se outra descrição anatômica em evolução natural com 75 anos de idade, com características semelhantes. 8 Chama a atenção de que a dilatação atrial direita pode se manter isolada, sem a ocorrência de dilatação do anel e assim sem insuficiência tricúspide, o que predispõe, no entanto, a arritmia supraventricular e a trombo interatrial, como ocorreu mesmo em um jovem de 17 anos. 6 …”

Case of single right atrial diverticulum and review of etiology and management

“…These patients usually remain asymptomatic until late in life. 6 They frequently come to medical attention because of gross cardiomegaly incidentally detected on routine chest radiographs. Atrial arrhythmias, thromboembolism, and sudden death have been reported.…”

Idiopathic right atrial enlargement

“…This condition is not usually accompanied by primary tricuspid valve disease; valvular insufficiency is the result of IERA. 2,3 The most important etiologies that should be excluded are absence of pericardium which can easily be seen in cardiac magnetic resonance imaging, and recurrent small pulmonary emboli which can be ruled out by comparing the current imaging and pressure study with a previous one. In our case, the patient had undergone echocardiography 2 years earlier, with the same huge right atrium but only mild pulmonary hypertension, which proved that IERA was the cause of his pulmonary hypertension.…”