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Open access Sep 2026

Incremental Value of 24-Hour Ambulatory Electrocardiogram-Derived Heart Rate Variability in Machine-Learning Prognostic Models for Heart Failure.

To determine whether heart rate variability (HRV) indices derived from 24-hour ambulatory electrocardiography provide complementary prognostic information in machine-learning prognostic models using conventional clinical variables in patients with heart failure, particularly with regard to calibration and threshold-bas...

Y. Matsuwaki, J. Hayano, H. Kawai et al. · 0 citations
Open access Aug 2026

HRV-Based Respiratory-Rate Estimation in Older Adults: Error Modeling and Pilot Validation for Wearable Sleep Monitoring

The HF-peak method is reliable when SNR is high and breathing is regular but requires additional quality criteria beyond SNR alone in older adult populations where non-respiratory HF oscillations may confound spectral peak detection.

Emi Yuda, Naoya Morikawa, J. Hayano · 0 citations

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