MEASURING STROKE VOLUME: IMPEDANCE CARDIOGRAPHY VS PHASE-CONTRAST MAGNETIC RESONANCE IMAGING.
Background Determination of cardiac output requires measurement of both heart rate and stroke volume. Techniques for measuring heart rate are widespread, and 1 technique for bedside monitoring of stroke volume is electrical impedance cardiography. Objectives To determine the accuracy and precision o...
| Publicado en: | American Journal of Critical Care Vol. 26; no. 5; pp. 408 - 416 |
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| Autores principales: | , , , , , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
American Association of Critical-Care Nurses
Sep2017
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=124667217&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 124667217 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10623264 44L jtl: American Journal of Critical Care issn: 10623264 maglogo: N pubinfo: dt: Sep2017 vid: 26 iid: 5 pid: 2559 pub: American Association of Critical-Care Nurses place: Alisa Veijo, California artinfo: ui: 124667217 124667217 124667217 10.4037/ajcc2017488 124667217 ppf: 408 ppct: 8 formats: fmt: @attributes: type: P tig: atl: MEASURING STROKE VOLUME: IMPEDANCE CARDIOGRAPHY VS PHASE-CONTRAST MAGNETIC RESONANCE IMAGING. aug: au: Borzage, Matthew Heidari, Kimia Chavez, Thomas Seri, Istvan Wood, John C. Blüml, Stefan affil: Assistant professor of research, Division of Neonatology and Department of Radiology, Children's Hospital Los Angeles sug: subj: Stroke Volume Evaluation Cardiography, Impedance Magnetic Resonance Imaging Comparative Studies Human Repeated Measures Descriptive Statistics P-Value Male Female Adult Middle Age Body Weight Body Height Linear Regression Adult: 19-44 years Middle Aged: 45-64 years Male Female ab: Background Determination of cardiac output requires measurement of both heart rate and stroke volume. Techniques for measuring heart rate are widespread, and 1 technique for bedside monitoring of stroke volume is electrical impedance cardiography. Objectives To determine the accuracy and precision of stroke volume measured via impedance cardiography and whether the technique can be used to detect trends. Methods Eleven healthy research participants (22-52 years old) were examined with simultaneous impedance cardiography and phase-contrast magnetic resonance imaging at rest and during exercise. Bland-Altman analysis with repeated-measures correction was used to compare stroke volumes determined with the 2 methods. The suitability of impedance cardiography for detecting trends in stroke volume was analyzed by using the Critchley radial limits of agreement method. Results Phase-contrast magnetic resonance imaging indicated a mean stroke volume of 87 (SD, 16) mL at rest; in 9 volunteers, it changed during exercise (P = .04 to P < .001); in 2 volunteers, it did not (P = .32, P = .06). For the range of stroke-volume measurements (60-122 mL), impedance cardiography yielded underestimates of stroke volumes at the low end (bias, -17 mL) and overestimates at the high end (bias, +17 mL; P < .001). Corresponding 95% limits of agreement were 64 mL, a 73% overestimate or underestimate of stroke volume at rest. Critchley radial limits of agreement indicated poor concordance of stroke-volume trends. Conclusions Impedance cardiography had low accuracy and precision in measuring absolute stroke volume and was a poor detector of stroke-volume trends. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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