Estimating Short-Term Heart Rate Variability from Ultra-Short PPG: Mitigating Systematic Bias Using Deep Learning.
Estimating standard short-term (ST, 5 min) heart rate variability (HRV) metrics (derived from electrocardiogram (ECG)) using ultra-short-term (UST, $< 5$ min) segments of photoplethysmogram (PPG) is desirable for real-time, cost-effective HRV monitoring in critical care settings. Traditional PPG-based HRV estimation re...