Lipomatous hypertrophy of the right atrium can cause superior vena caval obstruction, potentially complicating right heart catheterization.
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May warrant consideration in unexplained SVC obstruction; single case leaves open prevalence and catheterization implications.
A structural abnormality was suspected when passage of a Swan-Ganz catheter was obstructed at the distal superior vena cava (SVC). At autopsy, lipomatous hypertrophy of the right atrium markedly narrowed the lumen at the SVC-right atrial junction.
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McNamara et al. (1987) studied this question.
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