Key result
Beta-blockade lowered heart rate to 56 beats/min compared to 64 beats/min in controls (P<0.005), but HRV spectral measures did not consistently describe changes in autonomic balance.
Why the study?
Do HRV spectral components detect shifts in autonomic balance induced by beta-blockade or supine position in healthy subjects?
Do HRV spectral components detect shifts in autonomic balance induced by beta-blockade or supine position in healthy subjects?
Absolute Event Rate: 56% vs 64%
p-value: p=<0.005
Measures derived from heart rate variability power spectral analysis do not comprehensively or consistently describe changes in autonomic balance.
No takes yet. Share an insight, caveat, or question.
HRV spectral indices may fail to detect autonomic shifts at low sympathetic tone; leaves open their validity for resting assessments.
Hojgaard et al. (1998) studied Healthy subjects (n=33). Beta-blockade vs. Control conditions was evaluated on Heart rate and spectral components of heart rate variability (p=<0.005). Beta-blockade lowered heart rate to 56 beats/min compared to 64 beats/min in controls (P<0.005), but HRV spectral measures did not consistently describe changes in autonomic balance.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: