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A novel method for the noninvasive estimation of cardiac output with brachial oscillometric blood pressure measurements through an assessment of arterial compliance.
Álvarez-Montoya, Diego; Madrid-Muñoz, Camilo; Escobar-Robledo, Luis; Gallo-Villegas, Jaime; Aristizábal-Ocampo, Dagnovar.
Afiliación
  • Álvarez-Montoya D; Centro Clínico y de Investigación SICOR (Soluciones Integrales en Riesgo Cardiovascular).
  • Madrid-Muñoz C; Centro Clínico y de Investigación SICOR (Soluciones Integrales en Riesgo Cardiovascular).
  • Escobar-Robledo L; Centro Clínico y de Investigación SICOR (Soluciones Integrales en Riesgo Cardiovascular).
  • Gallo-Villegas J; Centro Clínico y de Investigación SICOR (Soluciones Integrales en Riesgo Cardiovascular).
  • Aristizábal-Ocampo D; Facultad de Medicina, Universidad de Antioquia.
Blood Press Monit ; 26(6): 426-434, 2021 Dec 01.
Article en En | MEDLINE | ID: mdl-34128491
OBJECTIVE: To propose and validate a new method for estimating cardiac output based on the total arterial compliance (Ct) formula that does not need an arterial waveform and to apply it to brachial oscillometric blood pressure measurements (OBPMs). METHODS: One hundred subjects with normal heart anatomy and function were included. Reference values for cardiac output were measured with echocardiography, and Ct was calculated with a two-element Windkessel model. Then, a statistical model of arterial compliance (Ce) was used to estimate cardiac output. Finally, the measured and estimated cardiac output values were compared for accuracy and reproducibility. RESULTS: The model was derived from the data of 70 subjects and prospectively tested with the data from the remaining 30 individuals. The mean age of the whole group was 43.4 ± 12.8 years, with 46% women. The average blood pressure (BP) was 107.1/65.0 ± 15.0/9.6 mmHg and the average heart rate was 67.7 ± 11.4 beats/min. The average Ct was 1.39 ± 0.27 mL/mmHg and the average cardiac output was 5.5 ± 1.0 L/min. The mean difference in the cardiac output estimated by the proposed methodology vs. that measured by Doppler echocardiography was 0.022 L/min with an SD of 0.626 L/min. The intraclass correlation coefficient was 0.93, and the percentage error was 19%. CONCLUSION: Cardiac output could be reliably and noninvasively obtained with brachial OBPMs through a novel method for estimating Ct without the need for an arterial waveform. The new method could identify hemodynamic factors that explain BP values in an ambulatory care setting.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Arteria Braquial Tipo de estudio: Prognostic_studies Límite: Adult / Female / Humans / Male / Middle aged Idioma: En Revista: Blood Press Monit Asunto de la revista: ANGIOLOGIA Año: 2021 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Arteria Braquial Tipo de estudio: Prognostic_studies Límite: Adult / Female / Humans / Male / Middle aged Idioma: En Revista: Blood Press Monit Asunto de la revista: ANGIOLOGIA Año: 2021 Tipo del documento: Article Pais de publicación: Reino Unido