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Heart rate variability indices in patients with coronary heart disease after short-term and long-term outpatient cardiac rehabilitation

Katarzyna Szmigielska, Anna Jegier

Med Sci Tech 2010; 51(2): 143-148

ID: 881271


Background:    The aim of this study was to evaluate the influence of regular physical activity on heart rate variability indices (HRV) in men with coronary heart disease.
    Material/Methods:    We studied 105 patients with coronary heart disease. Group 1 consisted of 42 participants in an 8-week early, ambulatory cardiac rehabilitation program (ACR). Group 2 consisted of 32 patients who had been participating in phase III ACR for a mean period of 7 years. Group 3 consisted of 31 sedentary patients who had no medical contraindications for physical activity. Time and frequency parameters were estimated from a short-term HRV procedure.
    Results:    In group 1 the HF increased, while LF and LF/HF ratio decreased significantly after 8 weeks of ACR. In group 2 the mRR and HF values were significantly higher, and LF and LF/HF ratio were significantly lower in comparison with group 1. Similar relationships were observed between physically active patients in group 2 and sedentary patients in group 3.
    Conclusions:    Heart rate variability indices in patients with coronary heart disease are positively modified after phase II rehabilitation. Regular, appropriate physical training, continued for several years in cardiac rehabilitation phase III, leads to more profound adaptive changes.

Keywords: heart rate variability, cardiac rehabilitation, exercise capacity

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