Ventilation Dispersion Index as an Objective Evaluation Tool of Exercise Oscillatory Ventilation in Patients With Heart Failure
Section snippets
Study Design and Participants
Consecutive patients who were referred to the cardiac rehabilitation unit of the University Hospital to perform the CPX between 2015 and 2017 were included as the study population. This is a cross-sectional study of a prospective cohort designed to monitor the results of a cardiac rehabilitation program. We included data from 43 patients of who presented the following inclusion criteria: (a) clinically stable (New York Heart Association functional classes I–III) diagnosed with HF; (b) clinical,
Results
Of the total of patients referred to the cardiac rehabilitation clinic during the research period, 43 individuals with HF met the inclusion criteria and were included. The sample predominantly included males (74.4%), with a mean age of 50 ± 12 years and a reduced ejection fraction (39 ± 15%); 13 patients had EOV(+) according to the reviewers’ analysis. The clinical and anthropometric characteristics of patients with HF included in the study are shown in Table 1. Fig. 1 shows that patients with
Discussion
The VDI was higher in the group of patients with EOV and proved to be a good predictor of EOV; the sensitivity and specificity in predicting EOV with a VDI of 0.601 was 83% and 61%, respectively. Patients with HF who had a VDI of 0.601 or greater had lower LVEF and higher resting and peak VE values when compared with the group with a VDI of less than 0.601. The VDI was shown to have a linear and positive relationship with the pulmonary function variables and with the ventilatory variables of
Disclosures
None.
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