title: Second derivative of photoplethysmogram.
authors.affiliation: Tokyo Medical University Hachiouji Medical Center, Tokyo, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Takazawa
mesh_terms: D000375:Aging / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010991:Plethysmography / Q000379:methods*; D019518:Postprandial Period / Q000502:physiology*; D014655:Vascular Resistance / Q000502:physiology*; D014664:Vasodilation / Q000502:physiology*