Unilateral absence of a pulmonary artery. Data from cardiopulmonary exercise testing.
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.
Brassard
J M
JM
Pulmonary Disease/Critical Care Service, Brooke Army Medical Center, Fort Sam Houston, Texas.
Johnson
J E
JE
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