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To investigate factors associated with enrollment and participation in cardiac rehabilitation (CR) in Korea.
Patients admitted to four university hospitals with acute coronary syndrome between June 2014 and May 2016 were enrolled. The Cardiac Rehabilitation Barriers Scale (CRBS) made of 21-item questionnaire and divided in four subdomains was administered during admission. CRBS items used a 5-point Likert scale and ≥2.5 was considered as a barrier. Differences between CR non-attender and CR attender, or CR non-enroller and CR enroller in subscale and each items of CRBS were examined using the chi-square test.
The CR participation rate in four hospitals was 31% (170 of the 552). Logistical factors (odds ratio [OR]=7.61; 95% confidence interval [CI], 4.62–12.55) and comorbidities/functional status (OR=6.60; 95% CI, 3.95–11.01) were identified as a barrier to CR enrollment in the subdomain analysis. Among patients who were enrolled (agreed to participate in CR during admission), only work/time conflict was a significant barrier to CR participation (OR=2.17; 95% CI, 1.29–3.66).
Diverse barriers to CR participation were identified in patients with acute coronary syndrome. Providing the tailored model for CR according to the individual patient's barrier could improve the CR utilization. Further multicenter study with large sample size including other CR indication is required.
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To confirm the improvement in arterial endothelial function by aerobic exercise training, flow-mediated dilation (FMD) was tested by ultrasonography.
Patients who received percutaneous coronary intervention due to acute coronary syndrome were included. The patients who participated in cardiac rehabilitation (CR) program were categorized as the CR group, and others who did not participate as the control. Both groups underwent initial graded exercise test (GXT) and FMD testing. Subsequently, the CR group performed aerobic exercise training sessions. Patients in control only received advice regarding the exercise methods. After six weeks, both groups received follow-up GXT and FMD testing.
There were 16 patients in each group. There were no significant differences in the general characteristics between the groups. The VO2peak was 28.6±4.7 mL/kg/min in the CR group and 31.5±7.4 mL/kg/min in the control at first GXT, and was 31.1±5.1 ml/kg/min in the CR group and 31.4±6.0 ml/kg/min in the control at the follow-up GXT in six weeks. There was a statistically significant improvement in VO2peak only for CR group patients. FMD value was 7.59%±1.26% in the CR group, 7.36%±1.48% in the control at first and 9.46%±1.82% in the CR group, and 8.31%±2.04% in the control after six weeks. There was a statistically significant improvement in FMD value in the CR group.
According to the results of GXT and FMD testing, six-week exercise-based CR program improved VO2peak and endothelial functions significantly. Thus, exercise-based CR program is necessary in patients with coronary artery disease.
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