Key result
A 5-second ECG Lorenz plot model accurately estimates conventional frequency-domain HF power.
Why the study?
Conventional frequency-domain HRV indices require recording durations that limit their applicability for rapid or repeated autonomic nervous function assessments.
Does a Lorenz plot-based estimation model accurately estimate 120-s frequency-domain high-frequency power from ultra-short-term recordings as short as 5 s?
Observational
Does a Lorenz plot-based estimation model accurately estimate 120-s frequency-domain high-frequency power from ultra-short-term recordings as short as 5 s?
Answers are grounded in this paper and cite their sources.
Parasympathetic modulation reflected in 120-s frequency-domain HF analysis can be practically estimated from ultra-short-term recordings as short as 5 s using a Lorenz plot-based model.
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Tatsumi et al. (2026) conducted an observational in Autonomic nervous function evaluation. Lorenz plot-based estimation model from ultra-short-term recordings vs. 120-s frequency-domain high-frequency power (HF) analysis was evaluated on Predictive accuracy for estimating the 120-s HF reference value. A Lorenz plot-based estimation model using ultra-short-term ECG recordings as short as 5 seconds can practically estimate the conventional 120-second frequency-domain high-frequency power.
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