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The paradoxical finding of mitral valve incompetence and cor triatriatum: a mechanism revealed?
  1. W Keeble,
  2. E Lundmark,
  3. H J Dargie

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Magnetic resonance imaging demonstrated features of cor triatriatum in a 27 year old woman (upper panel). In the absence of associated congenital anomalies, obstructive cor triatriatum due to a small, flow limiting fenestration will present in a similar manner to mitral stenosis. However, this woman presented with exertional breathlessness, paroxysmal nocturnal dyspnoea, and prominent murmur of mitral incompetence.

Echo confirmed significant mitral regurgitation with an enlarged but contractile left ventricle. (End diastolic dimension 7 cm …

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