Key result
Heart rate variability measurements demonstrated low reproducibility, with within-subject standard deviations of 0.79 log units in cardiac transplant recipients and 0.49 log units in normal subjects.
Why the study?
Is low-frequency heart rate variability measurement reproducible in cardiac transplant recipients and normal subjects?
Population
21 cardiac transplant recipients and 21 normal subjects (n=42)
Comparison
Heart rate variability measurement vs Normal subjects
Design
Cohort
Follow-up
2 weeks
Authors
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Low HRV reproducibility may limit clinical interpretation for reinnervation; leaves open needs for standardized protocols in future studies.
Observational (n=42)
Is low-frequency heart rate variability measurement reproducible in cardiac transplant recipients and normal subjects?
Absolute Event Rate: 0.79% vs 0.49%
Measurements of low-frequency heart rate variability have low reproducibility and significant diurnal variation, suggesting caution in their clinical interpretation for detecting autonomic reinnervation.
Lord et al. (2000) conducted an observational in Cardiac transplant (n=42). Cardiac transplantation vs. Normal subjects was evaluated on Within-subject S.D. of heart rate variability (log units). Heart rate variability measurements demonstrated low reproducibility, with within-subject standard deviations of 0.79 log units in cardiac transplant recipients and 0.49 log units in normal subjects.
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