SciELO - Scientific Electronic Library Online

vol.11 número2Tomografía computarizada y sólidos virtuales para obtener modelos biomecánicos computacionales índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




  • No hay articulos citadosCitado por SciELO

Links relacionados

  • No hay articulos similaresSimilares en SciELO


Revista Cubana de Informática Médica

versión On-line ISSN 1684-1859


HERNANDEZ CACERES, José Luis; REYES MORALES, Luis Alejandro  y  GONZALEZ FERNANDEZ, Rene Ivan. Relationship of Age with Spectral Components of Noise-Free Realizations of Photoplethysmographic Signals: Outcomes of a Nonlinear Identification Approach. RCIM [online]. 2019, vol.11, n.2, pp.3-15.  Epub 01-Dic-2019. ISSN 1684-1859.


Age-related changes in the vascular network have been widely documented, however, nonlinear identification has been poorly applied to the analysis of cardiovascular signals.


To determine the impact of age on spectral components of Noise-free realizations (NFR) obtained from photoplethysmographic signals, summarized in the Kernel Complexity Regressive Index (KCRIndex).


With 190 apparently healthy participants (9 to 89 years) from Orense, Spain, Photoplethysmographic signals were recorded during 5 minutes in supine position using Nellcor-395 pulse oximeter; signals were digitized at 1000 Hz, and furtherly submitted to nonlinear identification via a kernel nonlinear autoregressive estimator. KCRIndex is defined as the average of at least three negative slope values at the NFR log-log spectrum in the 9 to 25 Hz frequency region.


KCRIndex decreased with age in a linear fashion and did not differ between genders. The regression line obtained was KCRIndex=-0.025*age+6.868 (r=-0.751).


KCRIndex, is strongly correlated with age, thus opening up new possibilities for cardiovascular exploration at primary health care settings and even on open field conditions.

Palabras clave : cardiovascular age; photoplethysmographic signal; nonlinear dynamics; nonlinear nonparametric regression; KCRIndex.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )