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  • Title: [Cardiopulmonary exercise testing in chronic obstructive pulmonary disease (COPD) - breath-functional characterization and disease severity assessment].
    Author: Mühle A, Obst A, Winkler J, Ewert R.
    Journal: Pneumologie; 2015 Sep; 69(9):534-44. PubMed ID: 26205842.
    Abstract:
    COPD is a heterogeneous disease with a wide range of clinical phenotypes and breath-functional dysfunctions. Cardiopulmonary exercise testing (CPET) allows describing all component parts of breathing and determining exercise capacity and the mechanisms of exercise limitation. From these aspects 64 COPD patient stages II, III and IV according to the conventional GOLD classification were examined by means of CPET to evaluate whether CPET can provide a better functional characterization of COPD than the standard investigation procedures in pulmonary practice.We could show that in pulmonary practice CPET is safely and effectively practicable in stable COPD patients of all GOLD stages. This method allowed a clinical and prognostic disease severity assessment of all patients, proving important differences of peak oxygen uptake in each GOLD stage, so that patients in spite of identical GOLD disease severity were to be assigned to different prognostic groups according CPET criteria. Furthermore, we found relevant differences of individual breath-functional patterns in exercise, which can neither be objectified nor be prognosticated by standard investigation procedures at rest.Therefore CPET allows, aside from an objective clinical and prognostic disease severity assessment, also a breath-functional evaluation in a subtly way in COPD patients reflecting the multidimensional background of the disease with variable dysfunctions in pulmonary ventilation, gas exchange, circulation and muscular function as well as associated cardio vascular comorbidities. The breath-functional phenotyping of the COPD patient seems to be meaningful in particular for an individualised therapy management.
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