title: Unilateral absence of a pulmonary artery. Data from cardiopulmonary exercise testing.
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.
authors.affiliation: Pulmonary Disease/Critical Care Service, Brooke Army Medical Center, Fort Sam Houston, Texas.
authors.forename: J M
authors.initials: JM
authors.lastname: Brassard
authors.forename: J E
authors.initials: JE
authors.lastname: Johnson
mesh_terms: D000328:Adult; D015308:Anaerobic Threshold; D000013:Congenital Abnormalities / Q000175:diagnosis; D005080:Exercise Test; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D011651:Pulmonary Artery / Q000002:abnormalities*; D012126:Respiratory Dead Space; D013990:Tidal Volume; D016526:Workload