The technique of impedance cardiography

Woltjer, H. H.; Bogaard, Harm Jan; Vries, P. M. J. M. De

doi:10.1093/oxfordjournals.eurheartj.a015464

Cited by 104 publications

(80 citation statements)

References 77 publications

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“…Los electrodos de detección eléctrica se colocaron en muñeca izquierda y tobillo derecho, este último se cambió a muñeca derecha en los casos donde se detectaba señal baja, según el protocolo establecido. 9,18,19 El sistema NiCaS™ realiza mediciones hemodinámicas automáticamente cada 20 segundos; para la toma de cada paciente se realizó un registro de diez minutos para obtener un promedio adecuado de todas las mediciones obtenidas. De igual manera, se llevó a cabo la medición en 30 controles sin patología cardiovascular, pareados por edad y género.…”

Section: Materiales Y Métodosunclassified

“…5,6 La cardiografía por impedancia mide la conductividad eléctrica del tórax y sus variaciones (impedancia), mediante un electrodo de entrada y uno de salida. [7][8][9] Esta técnica permite la medición de variables funcionales como el gasto cardíaco, volumen sistólico, fluidos torácicos, función contráctil, entre otros; y al no ser invasiva ofrece una alternativa segura y confiable para la evaluación de enfermedades cardiovasculares. 10 Existe relación entre los valores hemodinámicos reportados mediante cardioimpedancia, con los obtenidos mediante monitoreo invasivo.…”

Section: Introductionunclassified

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Cardiografía por impedancia en la evaluación del perfil hemodinámico en la cardiopatía dilatada. Estudio transversal en un hospital público de Ecuador

2017

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ResumenObjetivos: describir el perfil hemodinámico de los pacientes del Ecuador con cardiopatía dilatada utilizando el sistema de cardiografía por impedancia, y comparar estos valores con los obtenidos de pacientes sanos. Metodología: 30 pacientes con diagnóstico previo de miocardiopatía dilatada en el Servicio de Cardiología del hospital Luis Vernaza fueron reclutados entre enero y junio de 2015. Fueron excluidos los pacientes con nefropatía crónica, cirrosis hepática o falla cardiaca grado IV de la New York Heart Association. Se midió las variables hemodinámicas mediante cardioimpedancia durante diez minutos. Posteriormente se realizó la misma medición a 30 controles voluntarios sin cardiopatía previa. Se calculó diferencia de medias mediante prueba T de Student y correlación de Pearson para evaluar las mediciones de función sistólica del ventrículo izquierdo. Resultados: la cardiopatía dilatada fue más común en varones (2: 1), la principal causa fue la hipertensión crónica (70 %). Se obtuvieron diferencias estadísticamente significativas (p < 0,05) en las variables de volumen latido, índice latido, gasto cardiaco, índice cardiaco y resistencia periférica total; no existió diferencia estadísticamente significativa en las presiones arteriales, agua corporal total e impedancia basal. El índice Granov-Goor se correlacionó débilmente con la fracción de eyección ventricular. Conclusión: la hipertensión arterial crónica es la principal causa de cardiopatía dilatada en nuestro medio. Estos pacientes tienen disminuidos los patrones hemodinámicos de bomba cardiaca (disfunción sistólica), y aumentada la resistencia periférica total, como cabría esperarse. La cardioimpedancia es un método eficaz, cómodo y no invasivo en el abordaje de las patologías cardiovasculares.PALABRAS CLAVE: cardiografía de impedancia, cardiopatías, insuficiencia cardiaca, hemodinámica, estudios transversales, Ecuador. Abstract Objectives: to describe the hemodynamic profile of patients from Ecuador with dilated cardiomyopathy using the impedance cardiography system and to compare these values with those obtained from healthy patients. Methodology: 30 patients with previous diagnosis of dilated cardiomyopathy at Luis Vernaza hospital cardiology service were recruited between January and June 2015. Patients with chronic nephropathy, liver cirrhosis or Grade IV heart failure of the New York Heart Association were excluded. Hemodynamic variables were measured by cardioimpedance for 10 minutes. Subsequently, the same measurement was performed on 30 voluntary controls without previous heart disease. Mean difference was calculated by Student's t-test and Pearson's correlation to evaluate the measurements of left ventricular systolic function. Results: dilated heart disease was more common in males (2: 1), the main cause was chronic hypertension (70 %). Statistically significant differences (p <0.05) were found in the variables of beat volume, beat rate, cardiac output, cardiac index and total peripheral resistance; there was no statistically significant...

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Section: Materiales Y Métodosunclassified

Section: Introductionunclassified

Cardiografía por impedancia en la evaluación del perfil hemodinámico en la cardiopatía dilatada. Estudio transversal en un hospital público de Ecuador

2017

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“…Then a mean velocity index is empirically derived from a peak amplitude measurement assumed to be an index of peak aortic accelera-tion of blood flow and a measurement of flow time. EC monitoring also provides estimation of systemic vascular resistance (SVR), information about thorax fluid capacity or contractility of the heart muscle [1,4].…”

Section: Introductionmentioning

confidence: 99%

The pilot study of role of electrical cardiometry in non-invasive assessment of hemodynamic parameters in patients with pulmonary arterial hypertension (RCD code: II-1A.1)

Kazimierczyk

Jasiewicz

Marcinkiewicz-Siemion

et al. 2017

Journal of Rare Cardiovascular Diseases

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Background: Electrical cardiometry (EC) technique could estimate cardiac output (CO), cardiac index (CI) and other parameters related to cardiac contractility and fluid status by measuring the thoracic electrical bioimpedance. We hypothesized that EC could assess right ventricle (RV) hemodynamic function in patients diagnosed with pulmonary arterial hypertension (PAH). Results: In our pilot study, enrolling 23 PAH patients, we observed a significant correlation (r = 0.71; p <0.001) between thermodilution CO measurement results (4.59 ±1.05 l/min) and CO results obtained by EC (4.86 ±1.20 l/min) and between systemic vascular resistance calculated by EC monitor and obtained during right heart catheterization (RHC) (r = 0.68; p = 0.002). Furthermore, EC parameter index of contractility (ICON) significantly correlated with tricuspid annular plane systolic excursion assessed by echocardiography (r = 0.57; p = 0.01). Conclusions: RHC cannot be replaced in obtaining accurate results of CO, however EC technique provides feasible insight into RV function at the bedside or outpatient care. JRCD 2017; 3 (2): 44-49

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“…In order to establish its validity, ICG has been widely compared to several methods which measure stroke volume and cardiac output [3], such as echocardiography [4,5], thermodilution [6,7], and the Fick method [8]. Impedance cardiography has been used for many clinical purposes.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of mitral insufficiency using impedance cardiography technique ICG

Chabchoub

Mansouri

Salah

2016

Journal of Electrical Bioimpedance

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Impedance cardiography (ICG) is a non-invasive tool for assessing the hemodynamic parameters. It has been used for diagnosing several cardiovascular diseases, such as heart failure, cardiomyopathy, and valvular diseases. Particularly, the valvular heart disease is characterized by the damage in one of the four heart valves: the mitral, aortic, tricuspid or pulmonary valves. The mitral valve insufficiency and the aortic valve stenos are the most frequent valve diseases in the world. In this paper, we propose to diagnosis the mitral valve insufficiency using the impedance cardiography technique. The study group consisted of 40 subjects (20 control subjects and 20 patients with mitral insufficiency). A parameter "I" is calculated from the impedance cardiogram waveform and it is used to differentiate control subjects from patients with mitral insufficiency. The parameter "I" was related significantly to the abnormalities of the impedance cardiogram waveform. For patients with mitral insufficiency, "I" was higher than for the healthy subjects with a difference ratio of 89% (p<0.001). To improve the diagnosis, we determined the stroke volume, cardiac output, and other hemodynamic parameters for the two groups of subjects. Finally, we concluded that we could identify, easily, patients with mitral insufficiency based on the abnormalities of the impedance cardiogram tracings and a characteristic parameter "I".

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The technique of impedance cardiography

Cited by 104 publications

References 77 publications

Cardiografía por impedancia en la evaluación del perfil hemodinámico en la cardiopatía dilatada. Estudio transversal en un hospital público de Ecuador

Cardiografía por impedancia en la evaluación del perfil hemodinámico en la cardiopatía dilatada. Estudio transversal en un hospital público de Ecuador

The pilot study of role of electrical cardiometry in non-invasive assessment of hemodynamic parameters in patients with pulmonary arterial hypertension (RCD code: II-1A.1)

Diagnosis of mitral insufficiency using impedance cardiography technique ICG

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