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Ei·sen·meng·er complex | \ ˈī-zən-ˌmeŋ-ər-, -sən- 
\
\variants:
or Eisenmenger's complex \ -ərz- \
\Medical Definition of Eisenmenger complex
: the combination of a congenital defect in the septum between the ventricles of the heart with its early complications that include left to right blood flow through the defect, increased blood pressure in the pulmonary arteries, and hypertrophy of the right ventricle
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