Fred Shaffer
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Corrigendum: A Practical Guide to Resonance Frequency Assessment for Heart Rate Variability Biofeedback Open
[This corrects the article DOI: 10.3389/fnins.2020.570400.].
A Critical Review of Ultra-Short-Term Heart Rate Variability Norms Research Open
Heart rate variability (HRV) is the fluctuation in time between successive heartbeats and is defined by interbeat intervals. Researchers have shown that short-term (∼5-min) and long-term (≥24-h) HRV measurements are associated with adaptab…
A Practical Guide to Resonance Frequency Assessment for Heart Rate Variability Biofeedback Open
Heart rate variability (HRV) represents fluctuations in the time intervals between successive heartbeats, which are termed interbeat intervals. HRV is an emergent property of complex cardiac-brain interactions and non-linear autonomic nerv…
View article: An Overview of Heart Rate Variability Metrics and Norms
An Overview of Heart Rate Variability Metrics and Norms Open
Healthy biological systems exhibit complex patterns of variability that can be described by mathematical chaos. Heart rate variability (HRV) consists of changes in the time intervals between consecutive heartbeats called interbeat interval…