Near-normal aerobic capacity in long-term survivors after lung transplantation.
ERJ Open Res
; 7(1)2021 Jan.
Article
em En
| MEDLINE
| ID: mdl-33569504
ABSTRACT
The clinical course of lung transplantation (LT) is diverse some patients present chronic lung allograft dysfunction (CLAD) and progressive decline in pulmonary function, but others maintain normal spirometric values and active lives. OBJECTIVES:
The aim of this study was to elucidate whether long-term LT survivors with normal spirometry achieve normal exercise capacity, and to identify predictive factors of exercise capacity.METHODS:
This was a cross-sectional multicentre study, where bilateral LT recipients who survived at least 10â years after LT, with normal spirometry, no diagnosis of CLAD and modified Medical Research Council dyspnoea degree ≤2 underwent cardiopulmonary exercise testing (CPET).RESULTS:
28 LT recipients were included with a mean±sd age of 48.7±13.6â years. Oxygen uptake (V' O2 ) had a mean±sd value of 21.49±6.68â mL·kg-1·min-1 (75.24±15.6%) and the anaerobic threshold was reached at 48.6±10.1% of the V' O2max predicted. The mean±sd heart rate reserve at peak exercise was 17.56±13.6%. The oxygen pulse increased during exercise and was within normal values at 90.5±19.4%. The respiratory exchange ratio exceeded 1.19 at maximum exercise. The median (25-75th percentile) EuroQol-5D score was 1 (0.95-1), indicating a good quality of life. The median (25-75th percentile) International Physical Activity Questionnaire score was 5497 (4007-9832)â MET-min·week-1 with 89% of patients reporting more than 1500â MET-min·week-1. In the multivariate regression models, age, sex and diffusing capacity of the lung for carbon monoxide remained significantly associated with V' O2max (mL·kg-1·min-1); haemoglobin and forced expiratory volume in 1â s were significantly associated with maximum work rate (watts), after adjusting for confounders.CONCLUSION:
We report for the first time near-normal peak V' O2 values during CPET and normal exercise capacity in long-term LT recipients without CLAD.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article