Key result
Guanfacine administration in patients with chronic heart failure increased high-frequency power by 154% and augmented the all-night ultradian rhythm by 361% (p<0.01).
Why the study?
Does guanfacine improve the sympathovagal imbalance related to sleep rhythm in patients with chronic heart failure?
Does guanfacine improve the sympathovagal imbalance related to sleep rhythm in patients with chronic heart failure?
p-value: p=<0.01
Central sympathoinhibition with guanfacine augments sleep-related parasympathetic tone in patients with chronic heart failure, potentially improving autonomic balance.
No takes yet. Share an insight, caveat, or question.
May support trials of guanfacine for HF autonomic imbalance; hypothesis-generating and should not change practice.
Yamazaki et al. (2005) studied Chronic heart failure (n=27). Guanfacine vs. Baseline (before administration) was evaluated on Ultradian rhythm of high-frequency (HF) components of heart rate variability (HRV) (p=<0.01). Guanfacine administration in patients with chronic heart failure increased high-frequency power by 154% and augmented the all-night ultradian rhythm by 361% (p<0.01).
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