m-mode contrast echocardiography with peripheral venous injections was performed in 73 patients with interatrial communications : 48 ( group 1 ) had a hemodynamically significant atrial septal defect ( asd ) , 19 ( group 2 ) had a patent foramen ovale ( pfo ) without clinical or oxymetric evidence of a shunt .
C0018817
atrial septal defect
C0016522
patent foramen ovale