Abstract:
BACKGROUND:We are unaware of any previous investigation that has compared the relationship of key cardiopulmonary exercise testing (CPX) variables to various measures of pathophysiology between heart failure-reduced ejection fraction (HFrEF) and HF-preserved ejection fraction (HFpEF) cohorts that are well matched with respect to baseline characteristics and their exercise response, which is the purpose of the present study. METHODS:Thirty-four patients with HFpEF were randomly matched to 34 subjects with HFrEF according to age and sex as well as peak oxygen consumption (VO2), ventilatory efficiency (VE/VCO2 slope), and exercise oscillatory ventilation (EOV). In addition to CPX, patients also underwent echocardiography with tissue Doppler imaging (TDI) and assessment of N-terminal pro-B-type natriuretic peptide (NT-proBNP). RESULTS:When matched for age, sex, and CPX variables, the HFrEF and HFpEF cohorts had similar echocardiography with TDI and NT-proBNP values, indicating comparable disease severity. In addition, the correlations between key CPX measures (peak VO2 and VE/VCO2 slope) and echocardiography with TDI and NT-proBNP measures were similar between HFrEF and HFpEF groups. Of note, the correlation between the VE/VCO2 slope and pulmonary artery systolic pressure and NT-proBNP was highly significant in both groups (r ≥ 0.65, p < 0.01). Moreover, subjects with EOV in both groups had a significantly higher PASP (∼47 vs. ∼35 mmHg, p < 0.05). CONCLUSIONS:The results of the current study indicate CPX equally represents disease severity in HFrEF and HFpEF patients. This is a novel finding supporting the key role of CPX in the clinical follow-up of HF patients irrespective of LVEF and cardiac phenotype.
journal_name
Eur J Prev Cardioljournal_title
European journal of preventive cardiologyauthors
Guazzi M,Labate V,Cahalin LP,Arena Rdoi
10.1177/2047487313476962subject
Has Abstractpub_date
2014-07-01 00:00:00pages
847-54issue
7eissn
2047-4873issn
2047-4881pii
2047487313476962journal_volume
21pub_type
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