<unk>  is a rare congenital heart disease in which the left atrium or right atrium is divided into two parts by a fold of tissue, a membrane, or a fibromuscular band. It may be associated with major congenital cardiac lesions such as common atrioventricular canal. The cause is not clear. Usual symptoms are exertional dyspnea, cough, hemoptysis, orthopnea and palpitation. Echocardiography, transesophageal echocardiography (TEE) and cardiac MRI can tell the diagnosis of<unk> . Surgery is the main treatment opinion. Prognosis of<unk>  depends on whether the surgery has been done.
Cor triatriatum
Beriberi heart disease
Libman-Sacks endocarditis
Atrial septal defect decompression sickness
Hypertrophic cardiomyopathy
Annuloaortic ectasia
Loeffler endocarditis
Perforated septum