Eisenmenger reaction

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Eisenmenger reaction (I-zĕn-meng-er) n. a condition in which pulmonary hypertension is associated with a septal defect, so that blood flows from the right to the left side of the heart or from the pulmonary artery to the aorta. Oxygen-depleted blood enters the general circulation, which results in cyanosis and polycythaemia. [ V. Eisenmenger (1864–1932), German physician]

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Eisenmenger reaction

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