J Korean Phys Ther.  2019 Oct;31(5):322-327. 10.18857/jkpt.2019.31.5.322.

The Influence of Maximal Aerobic Capacity on the Two Years Cardiac Related Re-Hospitalization in Patients with Heart Failure with Reduced Ejection Fraction in Korean Society

• Ryu HY
• Hong DS
• Kim TH

• KMID: 2465125
• DOI: http://doi.org/10.18857/jkpt.2019.31.5.322

Abstract

PURPOSE
This study examined the influence of the maximal aerobic capacity on the two-year cardiac-related re-hospitalization in patients with heart failure with a reduced ejection fraction (HFrEF) in Korean society.
METHODS
The maximal aerobic capacity of the study population (n=95, male 63%) was evaluated using a cardiopulmonary exercise (CPX) testing system. Each patient was followed up for two years to divide the HFrEF patients into two groups according to cardiac-related re-hospitalization: re-hospitalization (RH) group (n=29, 30%) and no re-hospitalization (NRH) group (n=66, 70%).
RESULTS
The relative peak VOâ‚‚ (mL/kg/min, p<0.001), exercise duration (p<0.001), respiratory exchange ratio (VCOâ‚‚/VOâ‚‚, p=0.001), systolic blood pressure (SBP) reserve (p=0.004), heart rate (HR) reserve (p=0.007), SBP max (p=0.02), and HR max (p=0.039) were significantly lower in the RH group than the NRH group during the CPX test. On the other hand, the ventilatory efficiency (VE/VCOâ‚‚ slope, p=0.02) and age (p=0.022) were significantly higher in the RH group than in the NRH group. In binary logistic regression analysis, the relative peak VOâ‚‚ (p=0.001, Wald Chi-square 10.137) was the strongest predictive factor on cardiac-related re-hospitalization, which was followed by VCOâ‚‚/VOâ‚‚ (p=0.019, Wald Chi-square 5.54). On the other hand, age (p=0.063, Wald Chi-square 3.445) did not have a significant influence on cardiac related re-hospitalization.
CONCLUSION
The maximal aerobic capacity, especially the relative peak VOâ‚‚, is the strongest factor on cardiac-related re-hospitalization within two years in patients with HFrEF in Korean society.

Keyword

Heart failure; Cardiopulmonary exercise test; Maximal aerobic capacity; Relative peak VOâ‚‚; Re-hospitalization

MeSH Terms

Blood Pressure
Exercise Test
Hand
Heart Failure*
Heart Rate
Heart*
Humans
Logistic Models
Male