文摘
Background The goal of the present study was to determine knee extensor muscle strength (KEMS) and degree of renal dysfunction associated with an exercise capacity of ? metabolic equivalents (METs) in male chronic heart failure (CHF) patients with chronic kidney disease (CKD). Methods In this cross-sectional study of 75 male CHF patients with CKD (65.3?±?11.6?years), we measured clinical characteristics, peak $ \dot{V}{\text{O}}_{2} $ , estimated glomerular filtration rate (eGFR), and KEMS. Patients were divided into two groups by exercise capacity: ? METs group (n?=?41) and <5 METs group (n?=?34). Cutoff values for KEMS and eGFR resulting in an exercise capacity of ? METs were selected with ROC curves. Patients were divided into four groups according to cutoff values, and numbers of patients attaining an exercise capacity of ? METs were compared between groups. Results Age was significantly higher although eGFR, Hb, and KEMS were lower in the <5 METs versus ? METs group (P?<?0.001). Multiple logistic regression analysis revealed a positive significant relation between KEMS and eGFR and exercise capacity of ? METs. Exercise capacity of ? METs was associated with KEMS of approximately 1.69?Nm/kg and an eGFR of 45.7?mL/min/1.73?m2. The number of patients attaining an exercise capacity of ? METs in the patients who did not reach both cutoff values was significantly lower than that in any other patients (P?<?0.001). Conclusion KEMS and eGFR may be useful indices for predicting attainment of exercise capacity of ? METs in male CHF patients with CKD.