Abstract 19966: Supervised Aerobic Exercise After Hospital Discharge Improves Pulmonary and Respiratory Muscle Function in Patients With Chronic Heart Failure
Background: Impaired pulmonary and respiratory muscle function is known to deteriorate the clinical outcome in patients with chronic heart failure (CHF). Exercise training was documented to improve exercise capacity, quality of life and prognosis in these patients. However, the effects of exercise training on pulmonary and respiratory muscle function are still controversial. We investigated the influence of supervised aerobic exercise on pulmonary and respiratory muscle function in CHF patients.
Methods: We followed up 494 patients with compensated CHF (64.3±0.6 years, 337 males) for 5 months. All patients received cardiac rehabilitation consisted of supervised aerobic exercise during hospitalization. We measured forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV1) to evaluate pulmonary function. We also measured maximal inspiratory pressure (PImax) as respiratory muscle strength. All parameters were measured before and after the 5-month observation period. Patients were divided into three groups based on the frequency of supervised aerobic exercise sessions after hospital discharge: group A (no sessions), group B (1-3 sessions per month) and group C (4 sessions per month or more). We examined the percentage change in the respiratory parameters from baseline to those after the observation period and compared these variables among the three groups using ANCOVA with adjustment for potential confounding factors.
Results: In all the patients, FVC, FEV1 and PImax increased significantly after the observation period as compared with each baseline (P<0.001, respectively). Group B and C showed significantly higher %change FVC and PImax as compared with group A (Figure). The %change FEV1 of group C was significantly higher than that of the other two groups (P=0.008 vs group A and P=0.047 vs group B).
Conclusion: Supervised aerobic exercise after hospital discharge improved pulmonary and respiratory muscle function in patients with CHF.
Author Disclosures: N. Hamazaki: None. T. Masuda: None. K. Kamiya: None. R. Matsuzawa: None. K. Nozaki: None. S. Tanaka: None. K. Yabu: None. T. Nokamura: None. M. Tabata: None. E. Maekawa: None. C. Noda: None. M. Yamaoka-Tojo: None. J. Ako: None.
- © 2016 by American Heart Association, Inc.