운동생리학 : 심장재활운동이 관상동맥 질환자의 운동 후 심박수 회복에 미치는 영향

Impaired heart rate recovery (HRR) after exercise, which is a marker of reduced parasympathetic activity, predicts untidily and cardiovascular disease events of patients with heart disuse. Although exercise-based cardiac rehabilitation has been well known to decrease of cardiovascular disease or all-cause mortality, these mechanisms are not complete understand. There is few data to the impact of HRR after exercise in cardiac rehabilitation program Therefore, we examined the effects of exercise training in cardiac rehabilitation pro gam to changes of HRR 32 nine patients (56.3±11.1 yrs) with PCI who participated phase II cardiac rehabilitation program wore randomly assigned to the exercise group (n=16) or the control group 01=16) who did not attend cardiac rehabilitation. Exercise group was intruded to continue prescribed aerobic type exercise at 50 to 80% of maximal heart rate reserve for 45 to (0 minutes a session 3 days per week. All patients underwent a symptom-limited exercise test with modified Bruce protocol at baseline and after 8 weeks. The value for the HRR was calculated as the difference between HR at peals exercise and HR at 1 minute (HRR1) of the recovery period during cxercise test At hairline, them were no significant differences in HRR 1 and other parameter in between group. After 8 weeks, the HRRI was significantly increased in exercise group (21.2±9.9 to 25.8±12.7, p=0.041)), but no significantly increased in control group (22.3±7.1 to 22.6±8.2, p=0.878B). Thee were also significant differences in between group (P〈0.001). Increased of HRR after exercise training might be due to improve in parasympathetic nervous activity, which could contribute to decrease risk of sudden cardiac death in patients with enrolled exercise-based cardiac rehabilitation.