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Unilateral absence of a pulmonary artery. Data from cardiopulmonary exercise testing
1Pulmonary Disease/Critical Care Service, Brooke Army Medical Center, Fort Sam Houston, Texas.
Chest
|January 1, 1993
Abstract:
A case of congenital, unilateral absence of a left pulmonary artery is described in a patient presenting with exertional dyspnea. Data from cardiopulmonary exercise testing suggest that the mechanism of dyspnea is secondary to a paradoxic elevation of the physiologic dead space to tidal volume ratio (VD/VT) during exercise.