October 1, 1995European Heart Journal
Circadian pattern of heart rate variability in chronic heart failure patients Effects of physical training
Key result
Physical training for 8 weeks in chronic heart failure patients improved heart rate variability indices, including a 58.3% increase in total power and 128.5% in high frequency.
Why the study?
Does physical training improve the circadian pattern of heart rate variability in chronic heart failure patients?
Study Design
Type
RCT (n=24)
Randomization
cross-over
Structured PICO
Does physical training improve the circadian pattern of heart rate variability in chronic heart failure patients?
P
Population
12 chronic heart failure patients and 12 age-matched normal controls (total n=24)
I
Intervention
8 weeks physical training
C
Comparator
8 weeks detraining (cross-over design) and age-matched normal controls
O
Outcome
Circadian pattern of heart rate variability (recorded over 24 h in relation to both time and frequency)surrogate
Physical training over 8 weeks maintains and significantly improves circadian variations in heart rate variability measures in patients with chronic heart failure.
Authors
Discussion
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Implication
Supports 8-week exercise in chronic HF to enhance autonomic function; extends RCT evidence on HRV modulation.
Cite This Study
Adamopoulos et al. (1995) conducted an RCT in chronic heart failure (n=24). physical training vs. detraining and age-matched normals was evaluated on circadian pattern of heart rate variability. Physical training for 8 weeks in chronic heart failure patients improved heart rate variability indices, including a 58.3% increase in total power and 128.5% in high frequency.