A Study of Cardiac Ventricle Performance Indices Estimated with Data from Single-Beat Pressure Volume Loops
Cardiac ventricle function can be measured from a multiple-beat pressure volume loop sequence, or estimated from a single beat of pressure volume loop data. In this study, the effectiveness of single-beat estimation is evaluated with functional markers defined by maximum elastance, isovolumic mode d...
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| Format: | Article |
| Language: | English |
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IFSA Publishing, S.L.
2020-09-01
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| Series: | Sensors & Transducers |
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| Online Access: | https://sensorsportal.com/HTML/DIGEST/september_2020/Vol_244/P_3159.pdf |
| Summary: | Cardiac ventricle function can be measured from a multiple-beat pressure volume loop sequence, or estimated from a single beat of pressure volume loop data. In this study, the effectiveness of single-beat estimation is evaluated with functional markers defined by maximum elastance, isovolumic mode developed pressure, ejecting mode pressure volume area, and isovolumic mode pressure volume area. These estimates applied a linear regression model of chamber volume equilibrium as the calculation input. With data collected from 23 published pressure volume diagrams, estimates were assessed for percent differences to multi-beat outcomes. Results by method were: isovolumic pressure volume area (4 ± 4 %), isovolumic peak pressure (8 ± 6 %), ejecting pressure volume area (9 ± 6 %), and maximum elastance (22 ± 17%); p<.0001 one way ANOVA. The isovolumic pressure volume area estimates had the minimum overall error, and appeared to correlate with chamber volume variations through a measured range from 25 mL to 230 mL. This size correlation suggests the method is useful for interpreting normality of natural changes occurring during developmental stages of pediatric patient growth. |
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| ISSN: | 2306-8515 1726-5479 |