AVCT theory grounds BP estimation in cardiac attractor geometry from PPG, validated by LightGBM on 46 subjects achieving SBP/DBP MAE of 2.05/1.67 mmHg under LOSO-CV and AAMI compliance.
Embeddings and delays as derived from quantification of recurrence plots
2 Pith papers cite this work. Polarity classification is still indexing.
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Introduces SCSI nonlinear complexity index for PPG cardiovascular stability, corrects evaluation leakages, applies Bayesian optimization over 15 parameters, and reports cross-validation AUC 0.720 with held-out pooled AUC 0.757.
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