Lipomatous hypertrophy of the interatrial septum presenting as sick sinus syndrome

Pericardial Fat Is Associated With Prevalent Atrial Fibrillation

“…Pericardial fat is significantly correlated with localized atrial septal fat, a finding known as lipomatous septal hypertrophy, which has been historically associated in several small studies with sick sinus syndrome26 and atrial arrythmias 27–29. Using necropsy data, Shirani et al have shown that interatrial fat correlated closely with epicardial fat thickness over the atrioventricular groove and the right ventricle.…”

Lipomatous hypertrophy of the interatrial septum

“…In most cases its diagnosis is made incidentally [2]. Cardiac arrhythmias including atrial fibrillation, atrial premature contractions and atrioventricular block may occur as a consequence of involvement of the atrial wall and atrioventricular conduction pathways [3]. We present a case of LHIS in an 87-year-old Italian woman (Fig.…”

Atrial lipomatous hypertrophy causing reduction in systemic venous return

“…Some authors have suggested an association with older age and obesity [1,2,3,4]. LHIAS is generally asymptomatic and may be incidentally found at postmortem, representing 0.6% of all benign cardiac tumours [5,6]. Patients may suffer supraventricular arrhythmias; occasionally haemodynamic compromise may be present, leading to congestive heart failure.…”