Cardiac MDCT with ECG-gating is a useful imaging modality for evaluating the dynamic functional and anatomical features of left atrial myxomas causing mitral valve obstruction.
May support MDCT for dynamic LA myxoma assessment preoperatively; hypothesis-generating and leaves open need for validation.
Myxoma is the most frequent primary cardiac neoplasm. The clinical signs and symptoms may be non-specific. Myxomas occur most frequently in the left atrium. A typical myxoma is a well defined mass which shows a lower attenuation than that of intracavitary blood (1). An atypical myxoma with internal hemorrhage shows high attenuation and contrast filled tumor. If myxomas grow bigger, it is more likely that they shift into the left ventricle during diastole via the mitral valve, thereby causing mitral valve obstruction. We report CT findings of two left atrial myomxas causing mitral valve obstruction.
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Yang et al. (2011) studied this question.
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