Multimodal assessment of arterial stiffness using photoplethysmography and laser Doppler flowmetry.

NPJ Cardiovasc Health · 2026 · PMC13066162 · PMID 41957271

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an expected trendno p-value reported

An expected trend was observed in the red PPG signal for the median end-datum difference, which increased with stiffness, indicating a sharper signal 19 .

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