Impedance cardiography: More questions than answers

  title={Impedance cardiography: More questions than answers},
  author={David J. Wang and Stephen S. Gottlieb},
  journal={Current Heart Failure Reports},
Thoracic electrical bioimpedance, also known as impedance cardiography (ICG), is a noninvasive method to obtain hemodynamic measurements, including cardiac output. Recently, there has been a flurry of reports on the clinical use of ICG. Authors have suggested that ICG measurements are useful for a myriad of situations, including diagnosis of heart failure, monitoring of a patient’s clinical status, and assisting in medicine titration decisions. However, data continue to suggest poor correlation… Expand
9 Citations
Influence of heart motion on cardiac output estimation by means of electrical impedance tomography: a case study.
A magnetic resonance imaging-based dynamic bio-impedance model fitting the morphology of a single male subject was built and achieved excellent accuracy in estimating a wide range of simulated SV values, but the strong correlation found between motion-induced changes and ventricular volume remains to be verified in larger datasets. Expand
Cardiac index assessment: Validation of a new non-invasive very low current thoracic bioimpedance device by thermodilution
Cardiac index values yielded by Hotman system compares favorably with that obtained with thermodilution in cardiac patients, and the coefficients of repeatability and intraclass correlation coefficients were high and similar for the two techniques. Expand
Cardiac status assessment with a multi-signal device for improved home-based congestive heart failure management
In this paper, non-invasive surrogate measures of the cardio-vascular function in particular systolic time intervals and pulse wave characteristics are analyzed to estimate Cardiac Output (CO) and Systemic Vascular Resistance (SVR) both are established clinical measures. Expand
Functional Valvular Incompetence in Decompensated Heart Failure: Noninvasive Monitoring and Response to Medical Management
In DF, functional MR and TR contribute to reduced cardiac output, increased thoracic fluid content, and systemic vascular resistance, together with enlarged atria and valvular orifice size, which can be improved by medical management. Expand
Accuracy of Impedance Cardiography for Hemodynamic Assessment During Rest and Exercise in Wheelchair Rugby Players
ICG can serve as a good estimate of basic hemodynamic parameters during rest and exercise in wheelchair rugby players but overestimates stroke volume and cardiac output. Expand
Non-invasive measurement of cardiac output in children with repaired coarctation of the aorta using electrical cardiometry compared to transthoracic Doppler echocardiography.
CO measurements in paediatric CoA patients in the absence of iLVOTv are clinically equivalent between EC and TTE, but not EC, suggesting the presence of i LVOTv may impact the accuracy of CO measurement by TTE. Expand
Appropriate delivery method for cardiac disease pregnancy based on noninvasive cardiac monitoring
In VD, the increase in venous circulation according to the autotransfusion is managed by increasing HR, and VD with epidural anesthesia will be the first preference for most cardiac patients. Expand
Proportional Assist Ventilation Improves Leg Muscle Reoxygenation After Exercise in Heart Failure With Reduced Ejection Fraction
PAV accelerates the recovery of central hemodynamics and muscle oxygenation in patients with heart failure with reduced left ventricular ejection fraction in HFrEF and might prove useful to improve the tolerance to repeated exercise during cardiac rehabilitation. Expand
Response Analysis of Left Ventricular Stroke Work Based on Micro-Surface Element Method
  • Shiqing Lu, L. Xue, J. Wang
  • Computer Science
  • 2010 International Conference on Biomedical Engineering and Computer Science
  • 2010
This paper analyzes the ability of left ventricular ejection, sums up the traditional analysis, and presents a dynamic simulation model to estimate the left ventricle ofleft ventricular Micro-Surface doing work to analyze the amount of left vents function which is based on the theory of elastic cavity. Expand


Comparison of impedance cardiography with invasive hemodynamic measurements in patients with heart failure secondary to ischemic or nonischemic cardiomyopathy.
Right-sided cardiac catheterization is frequently performed in patients with heart failure despite potential complications including arrhythmias, right ventricular or pulmonary artery perforation,Expand
Reproducibility of impedance cardiography hemodynamic measures in clinically stable heart failure patients.
The BioZ impedance cardiography measurements are responsive to hemodynamic activity-rest changes and are reproducible at a one week interval in clinically stable heart failure patients being treated in an outpatient clinic. Expand
Impedance cardiography
The cardiac output (CO) values obtained by means of EIC are compared with CO values obtainedby means of thermodilution, and a good correlation was found between COEIC and COTD. Expand
Equivalence of bioimpedance and thermodilution in measuring cardiac index after cardiac surgery.
TEB is equivalent to TD-derived cardiac index in postoperative cardiac surgery patients, and bias, bias, and precision measures within the large data set group and within each patient over time were calculated. Expand
Reproducibility of impedance cardiography parameters in outpatients with clinically stable coronary artery disease.
Impedance cardiography measurements demonstrate both intra- and inter-day reproducibility within clinically acceptable ranges in a clinically stable population of CAD patients. Expand
1126-109 Impedance cardiography in heart failure patients in the intensive care unit: Its value in the detection of left ventricular systolic dysfunction and correlation with the echocardiogram
The ability of ICG to detect systolic dysfunction in patients with heart failure, as well as its correlation with the echocardiogram, is evaluated. Expand
Outpatient cardiovascular management utilizing impedance cardiography.
Elect impedance cardiography technology and the use of impedanceCardiography in the home and outpatient clinic settings for the assessment and management of heart failure, resistant hypertension, and dual-chamber pacemaker optimization are reviewed. Expand
Comparison of changes in ejection fraction to changes in impedance cardiography cardiac index and systolic time ratio.
Impedance cardiography (ICG) may be a practical, reliable, and cost-effective method of monitoring left ventricular function and guiding management decisions. Expand
Impedance cardiography: the next vital sign technology?
The latest ICG technology for determining CO (CO-ICG) is less variable and more reproducible in an intrapatient sense than is CO-TD, it is equivalent to the average acceptedCO-TD in post-coronary artery bypass graft patients, and showed marked improvement in agreement with CO- TD compared to measurements made using previous generation ICG CO equations. Expand
Utility of impedance cardiography to determine cardiac vs. noncardiac cause of dyspnea in the emergency department.
Impedance cardiography can aid emergency department (ED) physicians in making more rapid and accurate determinations of cardiac vs. noncardiac cause of dyspnea, and ICG measurements demonstrated greater sensitivity, specificity, and positive and negative predictive values compared with the ED physician. Expand