Reference : Beat-to-beat estimation of the continuous left and right cardiac elastance from metri...
Scientific journals : Article
Human health sciences : General & internal medicine
Engineering, computing & technology : Multidisciplinary, general & others
Beat-to-beat estimation of the continuous left and right cardiac elastance from metrics commonly available in clinical settings.
Stevenson, David [> >]
Revie, James [> >]
Chase, J. Geoffrey [> >]
Hann, Christopher E. [> >]
Shaw, Geoffrey M. [> >]
LAMBERMONT, Bernard mailto [Centre Hospitalier Universitaire de Liège - CHU > > Frais communs médecine >]
GHUYSEN, Alexandre mailto [Centre Hospitalier Universitaire de Liège - CHU > > Urgences >]
Kolh, Philippe mailto [Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biochimie et physiologie générales, humaines et path. >]
Desaive, Thomas mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Thermodynamique des phénomènes irréversibles >]
BioMedical Engineering OnLine
BioMed Central
Yes (verified by ORBi)
United Kingdom
[en] ABSTRACT: INTRODUCTION: : Functional time-varying cardiac elastances (FTVE) contain a rich amount of information about the specific cardiac state of a patient. However, a FTVE waveform is very invasive to directly measure, and is thus currently not used in clinical practice. This paper presents a method for the estimation of a patient specific FTVE, using only metrics that are currently available in a clinical setting. METHOD: : Correlations are defined between invasively measured FTVE waveforms and the aortic and pulmonary artery pressures from 2 cohorts of porcine subjects, 1 induced with pulmonary embolism, the other with septic shock. These correlations are then used to estimate the FTVE waveform based on the individual aortic and pulmonary artery pressure waveforms, using the "other" dysfunction's correlations as a cross validation. RESULTS: : The cross validation resulted in 1.26% and 2.51% median errors for the left and right FTVE respectively on pulmonary embolism, while the septic shock cohort had 2.54% and 2.90% median errors. CONCLUSIONS: : The presented method accurately and reliably estimated a patient specific FTVE, with no added risk to the patient. The cross validation shows that the method is not dependent on dysfunction and thus has the potential for generalisation beyond pulmonary embolism and septic shock.

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