Impact of Cardiopulmonary Exercise Testing-Guided Cardiac Rehabilitation on Cardiorespiratory Function Exercise Tolerance and Quality of Life in Elderly Patients with CHD and HFpEF
ZHANG Yunshan, QIAN Jiali, CHEN Xiuli
Kunming Second People's Hospital, Yunnan Kunming 650000, China
Abstract:Objective: To explore the effects of cardiopulmonary exercise testing (CPET)-guided cardiac rehabilitation on cardiorespiratory function, exercise tolerance, and quality of life in elderly patients with coronary heart disease (CHD) and heart failure with preserved ejection fraction (HFpEF).Methods: A retrospective analysis was conducted on the clinical data of 103 elderly patients with coronary heart disease and HFpEF admitted to Kunming Second People's Hospital from June 2020 to May 2022. Patients were divided into two groups: the control group (51 cases) and the observation group (52 cases). The control group received conventional symptomatic treatment, while the observation group received CPET-guided cardiac rehabilitation in addition to the conventional treatment for 12 weeks. Changes in cardiorespiratory function [anaerobic threshold (AT), peak oxygen consumption (VO2 peak), exercise duration (ED), and ventilatory equivalent for carbon dioxide slope (VE/VCO2 slope)], myocardial enzyme levels [creatine kinase-MB (CK-MB), creatine kinase (CK), and lactate dehydrogenase (LDH)], N-terminal pro-brain natriuretic peptide (NT-proBNP), exercise tolerance [6-minute walk test (6 MWT)], Minnesota Living with Heart Failure Questionnaire (LHFQ) scores, and prognosis (1-year readmission rate and 1-year mortality rate) were compared before and after treatment.Results: After treatment, the observation group showed significantly higher AT 14.65±2.03mL·kg-1·min-1, VO2 peak mL·kg-1·min-1, and ED [(436.89±46.85) s] compared to the control group (11.24±1.95)mL·kg-1·min-1,(21.65±2.49)mL·kg-1·min-1, and (378.46±46.18)s, respectively. The VE/VCO2 slope in the observation group (30.27±2.75)mmoL/L was lower than in the control group (35.05±2.80)mmoL/L, with statistically significant differences (P<0.05). The observation group also had lower levels of CK-MB (136.84±24.35) IU/L, CK (28.48±4.29)IU/L, LDH (26.48±5.85)IU/L, and NT-proBNP (1535.25±32.09)pg/mL compared to the control group (325.45±35.48)IU/L, (56.26±5.84) IU/L, (49.32±6.88)IU/L, and (1716.73±39.42)pg/mL respectively, with statistically significant differences (P<0.05). The 6 MWT in the observation group [(405.46±52.28) m] was greater than in the control group [(345.19±48.64) m], with a statistically significant difference (P<0.05). LHFQ scores for emotional, physical, and other domains, as well as the total score, were significantly lower in the observation group [(8.26±1.95) points, (22.49±3.68) points, (21.58±3.39) points, and (56.29±5.39) points] compared to the control group [(11.38±2.26) points, (25.55±3.80) points, (24.68±3.97) points, and (63.45±6.98) points], with statistically significant differences (P<0.05). The 1-year readmission rate and 1-year mortality rate in the observation group were 15.38% and 5.77%, respectively, compared to 31.37% and 15.69% in the control group, with no statistically significant difference (P>0.05).Conclusion: CPET-guided cardiac rehabilitation can suppress myocardial enzyme levels, improve cardiorespiratory function, and enhance exercise tolerance and quality of life in elderly patients with coronary heart disease and HFpEF.
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