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Title: | Differential impacts of body composition on oxygen kinetics and exercise tolerance of HFrEF and HFpEF patients | Authors: | Cipriano, Gerson Da Luz Goulart, Cássia Chiappa, Gaspar Da Silva, Marianne Silva, Natália Do Vale Lira, Amanda Negrão, Edson Dávila, Luciana Ramalho, Sergio De Souza, Fausto Cipriano, Graziella Hirai, Daniel HANSEN, Dominique Cahalin, Lawrence |
Issue Date: | 2024 | Publisher: | Source: | Scientific Reports, 14 (1) (Art N° 22505) | Abstract: | This study aims to (1) compare the kinetics of pulmonary oxygen uptake (VO2p), skeletal muscle deoxygenation ([HHb]), and microvascular O 2 delivery (QO 2 mv) between heart failure (HF) patients with reduced ejection fraction (HFrEF) and those with preserved ejection fraction (HFpEF), and (2) explore the correlation between body composition, kinetic parameters, and exercise performance. Twenty-one patients (10 HFpEF and 11 HFrEF) underwent cardiopulmonary exercise testing to assess VO 2 kinetics, with near-infrared spectroscopy (NIRS) employed to measure [HHb]. Microvascular O 2 delivery (QO 2 mv) was calculated using the Fick principle. Dual-energy X-ray absorptiometry (DEXA) was performed to evaluate body composition. HFrEF patients exhibited significantly slower VO 2 kinetics (time constant [t]: 63 ± 10.8 s vs. 45.4 ± 7.9 s; P < 0.05) and quicker [HHb] response (t: 12.4 ± 9.9 s vs. 25 ± 11.6 s; P < 0.05). Microvascular O2 delivery (QO 2 mv) was higher in HFrEF patients (3.6 ± 1.2 vs. 1.7 ± 0.8; P < 0.05), who also experienced shorter time to exercise intolerance (281.6 ± 84 s vs. 405.3 ± 96 s; P < 0.05). Correlation analyses revealed a significant negative relationship between time to exercise and both QO 2 mv (ρ=-0.51; P < 0.05) and VO2 kinetics (ρ=-0.63). Body adiposity was negatively correlated with [HHb] amplitude (ρ=-0.78) and peak VO 2 (ρ=-0.54), while a positive correlation was observed between lean muscle percentage, [HHb] amplitude, and tau (ρ= 0.74 and 0.57; P < 0.05), respectively. HFrEF patients demonstrate more severely impaired VO2p kinetics, skeletal muscle deoxygenation, and microvascular O 2 delivery compared to HFpEF patients, indicating compromised peripheral function. Additionally, increased adiposity and reduced lean mass are linked to decreased oxygen diffusion capacity and impaired oxygen uptake kinetics in HFrEF patients. | Keywords: | Heart failure [Mesh];Exercise Tolerance [Mesh];Exercise Test [Mesh];Oxygen consumption [Mesh];Tissue oxygenation index [All fields];Oxygen uptake kinetics [All fields] | Document URI: | http://hdl.handle.net/1942/44424 | ISSN: | 2045-2322 | e-ISSN: | 2045-2322 | DOI: | 10.1038/s41598-024-72965-0 | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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Cipriano et al Sci Rep 2024.pdf | Published version | 2.28 MB | Adobe PDF | View/Open |
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