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Comparative Study
. 2025 Mar 31;82(1):95-109.
doi: 10.31053/1853.0605.v82.n1.45253.

[Validation of a new impedance cardiography device for noninvasive hemodynamic measurement in outpatient hypertensive patients]

[Article in Spanish]
Marcelo A Rada  1 , Paula Edit Cuffaro  1 , María Celeste Szydlowicz  1 , Verónica Andrea Peuchot  1 , Margarita Susana Morales  1 , Jorge Javier Janson  1 , Ruben Micali  1 , José Alfie  1 , Carlos Rodolfo Galarza  1
Affiliations
Comparative Study

[Validation of a new impedance cardiography device for noninvasive hemodynamic measurement in outpatient hypertensive patients]

[Article in Spanish]
Marcelo A Rada et al. Rev Fac Cien Med Univ Nac Cordoba. .

Abstract
in English, Spanish

Objective: To compare the new cardiograph ZLogic for non-invasive measurements of Stroke volume (SV) and Cardiac output (CO) against the Minnesota cardiograph.

Methods: 86 subjects from both genders, 18-80 years old, hypertensive and healthy volunteers were included. Three hemodynamic measurements performed with each device, in an alternate fashion, using the Bland-Altman method to determine the level of agreement. Percentage error was calculated for interchangeability of both methods.

Results: Mean SV was 86.71±27.35 mL and mean CO 5.42±1.74 L/min. There was a strong correlation between measures of SV and CO obtained with both devices (r=0.99, p<0.001). Mean difference (MD) for SV was 0.65±3.08 mL (CI95%: -0.01-1.31) and 95% limits of agreement −5.39 to +6.69 mL. MD for CO was 0.05±0.17 L/min (CI95%: 0.01-0.09) and the 95% limits of agreement −0.28 to +0.38 L/min.

Conclusion: ZLogic and Minnesota cardiographs provided equivalent SV and CO values in ambulatory hypertensive patients.

Objetivo: Comparar las estimaciones no invasivas de volumen sistólico (VS) y volumen minuto (VM) obtenidas por un nuevo cardiógrafo (ZLogic) y por un cardiógrafo de referencia (Minnesota).

Métodos: Se incluyeron 86 sujetos de ambos sexos, de 18 a 80 años, hipertensos y voluntarios sanos. Se realizaron tres mediciones hemodinámicas con cada aparato, de forma alternativa, utilizando el método Bland-Altman para determinar el nivel de acuerdo. Se calculó un porcentaje de error para la intercambiabilidad de ambos métodos.

Resultados: La media de VS fue de 86,71±27,35 mL y la media de VM 5,42±1,74 L/min. Hubo una fuerte correlación entre las medidas de VS y VM obtenidas con ambos dispositivos (r=0,99, p<0,001). La diferencia media (DM) para la VS fue de 0,65±3,08 mL (IC95%: -0,01-1,31) y los límites de acuerdo del 95% -5,39 a +6,69 mL. La DM para el VM fue de 0,05±0,17 L/min (IC95%: 0,01-0,09) y los límites de acuerdo del 95% -0,28 a +0,38 L/min.

Conclusión: Los cardiógrafos de ZLogic y Minnesota proporcionaron valores equivalentes de VS y CO en pacientes hipertensos ambulatorios.

Keywords: impedance cardiography; stroke volumen; cardiac output; hypertension.

PubMed Disclaimer

Conflict of interest statement

Conflicto de interés

Ninguno.

Figures

Figura 1
Figura 1. A, Correlación Volumen sistólico. B Correlación volumen sistólico promedio. C, Correlación VM. D Correlación VM medio.
Figura 2
Figura 2. A. Bland-Altman Volumen sistólico. B. Bland Altman Volumen Minuto
See this image and copyright information in PMC

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