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  • Title: Reverse ventilation--perfusion mismatch.
    Author: Palmaz JC, Barnett CA, Reich SB, Krumpe PE, Farrer PA.
    Journal: Clin Nucl Med; 1984 Jan; 9(1):6-9. PubMed ID: 6230192.
    Abstract:
    Patients having lobar airway obstruction or consolidation usually have decreases of both ventilation and perfusion on lung scans. We report three patients in whom hypoxic vasoconstriction was apparently incomplete, resulting in a "reversed" ventilation-perfusion mismatch. Perfusion of the hypoxic lobe on the radionuclide scan was associated with metabolic alkalosis, pulmonary venous and pulmonary arterial hypertension in these patients.
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