Key result
Atypical lipomatous hypertrophy of the interatrial septum can initially manifest as syncope due to obstruction of the superior vena cava at the right atrial junction.
Highlights that atypical lipomatous hypertrophy of the interatrial septum can present with syncope due to superior vena cava obstruction.
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Alerts clinicians to rare syncope cause; single case leaves open incidence and management questions.
Lipomatous hypertrophy of the interatrial septum (LHIS) is an incidental echocardiographic abnormality characterized by dumb-bell configuration of the interatrial septum from excess fat deposition. We report a case of syncope in a patient with LHIS obstructing the superior vena cava at the right atrial junction.
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Sheikh et al. (2012) studied this question. Atypical lipomatous hypertrophy of the interatrial septum can initially manifest as syncope due to obstruction of the superior vena cava at the right atrial junction.
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