Correlation of impedance cardiography with invasive hemodynamic measurements in patients with advanced heart failure: The BioImpedance CardioGraphy (BIG) substudy of the Evaluation Study of Congestive Heart Failure and Pulmonary Artery Catheterization Effectiveness (ESCAPE) Trial

Kamath, Sandeep; Drazner, Mark H.; Tasissa, Gudaye; Rogers, Joseph G.; Stevenson, Lynne Warner; Yancy, Clyde W.

doi:10.1016/j.ahj.2009.06.002

Cited by 85 publications

(51 citation statements)

References 15 publications

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“…22 At the largest randomised trial on heart failure patients -the BIG study as a part of ESCAPE study-only a modest correlation was observed between two techniques. 23 Results of our sample population affirm the strong relationship between invasive and ICG measurements of cardiac output.…”

Section: -21supporting

confidence: 50%

Impedance Cardiography for Demonstrating Procedural Efficacy of Percutaneous Mitral Balloon Valvuloplasty

Omaygenç¹,

Doğan²,

Bakal³

et al. 2015

Turkiye Klinikleri J Cardiovasc Sci

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A AB BS ST TR RA AC CT T O Ob bj je ec ct ti iv ve e: : Impedance Cardiography (ICG) method, facilitates measuring hemodynamic parameters indirectly by recording thoracic impedance variations induced by cyclic changes in blood flow. The aim of this study is to evaluate alterations in hemodynamic parameters obtained by impedance cardiography (ICG) in addition to conventional echocardiographic and catheterization data after percutaneous mitral balloon valvuloplasty (PMBV). M Ma at te er ri ia al l a an nd d M Me et th ho od ds s: : 18 patients with severe rheumatic mitral stenosis to whom PMBV had been performed were included in this study. Impedance cardiographic measurements were performed in addition to routine echocardiographic examination and invasive left atrial and pulmonary arterial pressure recordings before and after the procedure. Cardiac output was calculated with direct Fick method before PMBV. Average values of several measurements were used to obtain the most accurate results for atrial fibrillation patients in the study group. R Re es su ul lt ts s: : Following successful PMBV, in impedance cardiographic evaluation an increase in cardiac output (4.69±1.46 and 5.68±1.3 l/min, before and after PMBV, respectively, p<0.001) and cardiac index (2.72±0.81 and 3.29±0.73 l/min/m 2 , before and after PMBV, respectively, p<0.001) an evident prolongation in ejection period (246.8±40.3 and 275.2±32.1 msec, before and after PMBV, respectively, p<0.001); and a statistically significant reduction in pre-ejection period (103.7±41.8 and 82.7±16.8 msec, before and after PMBV, respectively, p=0.033), and thoracic fluid content (34.3±11.2 and 27.7±5.31/kΩ, before and after PMBV, respectively, p=0.037) was observed. There was a strong correlation between preprocedural cardiac output calculations of ICG and direct Fick method (r:0.89, p<0.001). C Co on nc cl lu us si io on n: : In addition to the conventional methods, serial recordings of impedance cardiographic outputs may yield beneficial information for the assessment of PMBV efficacy. As a non-invasive and easily applicable method, it might be utilized during in-hospital follow-up. K Ke ey y W Wo or rd ds s: : Cardiography, impedance; mitral valve stenosis; mitral valve annuloplasty Ö ÖZ ZE ET T A Am ma aç ç: : Empedans kardiyografi (EmKG), atımdan atıma değişen kan akımının oluşturduğu göğüs empedans değişikliklerini kaydederek hemodinamik parametrelerin dolaylı olarak ölçülmesine imkân tanıyan bir yöntemdir. Bu çalışmada, perkütan mitral balon valvuloplasti (PMBV) sonrası rutin olarak değerlendiri-len ekokardiyografi ve kateterizasyon verilerine ek olarak; EmKG ile elde edilen hemodinamik göstergeler-deki değişimlerin incelenmesi amaçlandı. G Ge er re eç ç v ve e Y Yö ön nt te em ml le er r: : Çalışmaya PMBV uygulanan 18 ciddi mitral darlığı hastası alındı. İşlem öncesi ve sonrasında, rutin ekokardiyografik inceleme ve invaziv sol atriyum ve pulmoner arter basınç kayıtlarına ek olarak EmKG ölçümleri yapıldı. PMBV öncesi kardiyak debi Fick yön-temiyle hesaplandı. Ça...

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Section: -21supporting

confidence: 50%

Impedance Cardiography for Demonstrating Procedural Efficacy of Percutaneous Mitral Balloon Valvuloplasty

Omaygenç¹,

Doğan²,

Bakal³

et al. 2015

Turkiye Klinikleri J Cardiovasc Sci

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“…Thus, hemodynamic parameters and the volemic status can be estimated. Although TIC has been evaluated in some clinical situations [6][7][8][9] , some questions remain on its accuracy and usefulness 10 . Cardiac magnetic resonance imaging (CMRI) is considered the gold-standard for the calculation of cardiac volumes 11,12 , and no previous study comparing the two methods has ever been conducted.…”

mentioning

confidence: 99%

Bioimpedância transtorácica comparada à ressonância magnética na avaliação do débito cardíaco

Villacorta¹,

Villacorta²,

Amador

et al. 2012

Arq. Bras. Cardiol.

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ResumoBackground: Cardiac magnetic resonance imaging is considered the gold-standard method for the calculation of cardiac volumes. Transthoracic impedance cardiography assesses the cardiac output. No studies validating this measurement, in comparison to that obtained by magnetic resonance imaging, are available.Objective:To evaluate the performance of transthoracic impedance cardiography in the calculation of the cardiac output, cardiac index and stroke volume using magnetic resonance imaging as the gold-standard.Methods:31 patients with a mean age of 56.7 ± 18 years were assessed; of these, 18 (58%) were males. Patients whose indication for magnetic resonance imaging required pharmacologic stress test were excluded. Correlation between methods was assessed using the Pearson's coefficient, and dispersion of absolute differences in relation to the mean was demonstrated using the Bland-Altman's method. Agreement between methods was analyzed using the intraclass correlation coefficient.

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“…The working hypothesis behind the use of transthoracic bioimpedance, despite some controversial evidence 36 is that when comparing surface and invasive measurements simultaneously, a significant correlation is found between thoracic conductance and pulmonary wedge pressure. 22,24 In fact, thoracic conductance has proven useful in detecting high-risk heart failure patients 25 and in identifying severe diastolic dysfunction.…”

Section: Discussionmentioning

confidence: 99%

Transthoracic Bioimpedance and Brain Natriuretic Peptide Assessment for Prognostic Stratification of Outpatients With Chronic Systolic Heart Failure

Malfatto

Corticelli

Villani

et al. 2013

Clinical Cardiology

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Background: In patients with chronic heart failure, physical evaluation and clinical judgment may be inadequate for prognostic stratification. Hypothesis: Information obtained with simple bedside tests would be helpful in patient management. Methods: We report on 142 outpatients with systolic heart failure seen at our heart failure unit from 2007 to 2010 (ages 69.4 ± 8.9 years; ejection fraction [EF] 30.6 ± 6.1%; 43% with implanted defibrillators and/or resynchronization devices). At their first visit, we assessed levels of brain natriuretic peptide (BNP) (pg/mL), evaluated transthoracic conductance (TFC) (1/k ) by transthoracic bioimpedance, and performed echocardiography. Results: Four-year mortality was 21.2%. At multivariate analysis, surviving and deceased subjects did not differ regarding New York Heart Association, age, gender, heart failure etiology, or EF at index visit. Patients who died had higher BNP and TFC (BNP = 884 ± 119 pg/mL vs 334 ± 110 pg/mL; TFC = 50 ± 8/k vs 37 ± 7/k , both P < 0.001]. Patients with BNP < 450 pg/mL and TFC < 40/k had a 2.1% 4-year mortality, compared to 46.5% mortality of patients having BNP ≥ 450 pg/mL and TFC ≥ 40/k . BNP ≥ 450 pg/mL and TFC ≥ 40/k showed high sensitivity (91%) and specificity (88%)in identifying patients who died at follow-up. Conclusions: The combined use of BNP and impedance cardiography during the first assessment of a patient in a heart failure unit identified those carrying a worse medium-term prognosis. This approach could help the subsequent management of patients, allowing better clinical and therapeutic strategies.

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Correlation of impedance cardiography with invasive hemodynamic measurements in patients with advanced heart failure: The BioImpedance CardioGraphy (BIG) substudy of the Evaluation Study of Congestive Heart Failure and Pulmonary Artery Catheterization Effectiveness (ESCAPE) Trial

Abstract: Background-Impedance cardiography (ICG) is a noninvasive modality that utilizes changes in impedance across the thorax to assess hemodynamic parameters, including cardiac output (CO). The utility of ICG in patients hospitalized with heart failure (HF) is uncertain.

Cited by 85 publications

References 15 publications

Impedance Cardiography for Demonstrating Procedural Efficacy of Percutaneous Mitral Balloon Valvuloplasty

Impedance Cardiography for Demonstrating Procedural Efficacy of Percutaneous Mitral Balloon Valvuloplasty

Bioimpedância transtorácica comparada à ressonância magnética na avaliação do débito cardíaco

Transthoracic Bioimpedance and Brain Natriuretic Peptide Assessment for Prognostic Stratification of Outpatients With Chronic Systolic Heart Failure

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