Exertional-induced bronchoconstriction: Comparison between cardiopulmonary exercise test and XXXX challenging test.

@entity1 @entity64 @entity1353 @entity565 @entity26 @entity358 @entity1729 @entity2710
INTRODUCTION: Exertional-induced bronchoconstriction is a condition in which the physical activity causes constriction of airways in @entity1 with airway hyper- responsiveness. In this study, we tried to study and evaluate any relationship between the findings of cardiopulmonary exercise testing (CPET) and the response to @entity2710 challenge test (MCT) in @entity1 with @entity1353 after activity. MATERIALS AND METHODS: Thirty @entity1 with complaints of @entity1353 following activity referred to "Lung Clinic" of Baqiyatallah Hospital but not suffering from @entity565 were entered into the study. The subjects were excluded from the study if: Suffering from any other @entity358 , smoking more than 1 cigarette a week in the last year, having a history of smoking more than 10 packets of cigarettes/year, having @entity1729 in the past 4 weeks, having abnormal chest X-ray or electrocardiogram, and cannot discontinue the use of medicines interfering with bronchial provocation. Baseline spirometry was performed for all the @entity1 , and the values of forced expiratory volume in 1 second (FEV1), forced vital capacity (FVC), and FEV/FVC were recorded. The MCT and then the CPET were performed on all @entity1 . RESULTS: The mean VO 2 (volume @entity26 ) in @entity1 with positive @entity2710 test (20.45 mL/kg/min) was significantly lower than @entity1 with negative MCT (28.69 mL/kg/min) (P = 0.000). Respiratory rates per minute (RR) and minute ventilation in the group with positive MCT (38.85 and 1.636 L) were significantly lower than the group with negative @entity2710 test (46.78 and 2.114 L) (P < 0.05). Also, the O 2 pulse rate in the group with negative @entity2710 test (116.27 mL/beat) was significantly higher than the group with positive @entity2710 test (84.26 mL/beat) (P < 0.001). CONCLUSION: Pulmonary response to exercise in @entity1 with positive @entity2710 test is insufficient. The dead space ventilation in these @entity1 has increased. Also, dynamic hyperinflation in @entity1 with positive @entity2710 test causes the reduced @entity64 volume and O 2 pulse in these @entity1 .
