BACKGROUND: @entity1184 of the interatrial septum (LHIS) is a benign disorder characterized by fat accumulation in the interatrial septum. It typically occurs in elderly, @entity28 @entity1 and may cause @entity943 . OBJECTIVES: The purpose of this study was to determine the imaging features of this cardiac pathology using multislice CT (MSCT), and its relationship with clinical findings. MATERIALS AND METHODS: A total of 1,292 consecutive @entity1 who underwent MSCT of the thorax from September 2001 to August 2002 were prospectively studied. Beside the analysis of @entity1 records, the amount of fat in the interatrial septum, and its size and shape were determined. RESULTS: Among the 1,292 @entity1 investigated, we found 28 (2.2%) with LHIS. The mean age of affected @entity1 was 72.2 years. MSCT studies revealed a mass of fat attenuation with sharp margins and sparing of the fossa ovalis, resulting in a dumbbell shape in all @entity1 . The median thickness of the interatrial septum was 32 mm (range, 20 to 62 mm), and the median craniocaudal extend was 62 mm (range, 51 to 89 mm). Twenty-one @entity1 (75.0%) showed increased epicardial fat, 18 @entity1 (64.3%) had significant @entity2542 , and 13 of 21 @entity1 (61.9%) showed @entity854 . Three @entity1 underwent functional cardiac MRI studies. In one @entity1 , hemodynamic obstruction by LHIS was shown. CONCLUSIONS: MSCT scanning is a useful method to diagnose LHIS, a @entity299 that in our series reached a 2.2% incidence. The lesion shows characteristic features, thus differentiating it from other @entity4617 . Advanced age, @entity28 , @entity2542 , and @entity943 are common additional findings in @entity1 with LHIS.

XXXX of the interatrial septum: a prospective study of incidence, imaging findings, and clinical symptoms.

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity28 :: ('MESH:D009765', 'Disease') :: ['obese', 'obesity'] @entity1184 :: ('MESH:D006984', 'Disease') :: ['Lipomatous hypertrophy'] @entity4617 :: ('MESH:D006338', 'Disease') :: ['cardiac tumors'] @entity854 :: ('MESH:D018376', 'Disease') :: ['ECG abnormalities'] @entity299 :: ('MESH:D006331', 'Disease') :: ['cardiac condition'] @entity943 :: ('MESH:D001145', 'Disease') :: ['atrial arrhythmias', 'arrhythmia'] @entity2542 :: ('MESH:D011656', 'Disease') :: ['pulmonary emphysema']
@entity1184 :: (MESH:D006984,Disease) :: ['Lipomatous hypertrophy']
