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ICG: Impedance Cardiography/Cardiac Output

Advanced Solutions for ICG Acquisition and Analysis

Wired, wireless, and MR solutions for measuring cardiac outupt

Comprehensive array of noninvasive impedance cardiography recording and measurement tools

AcqKnowledge ICG data dz/dt impedance cardiography

Noninvasive impedance cardiography (ICG) tools

AcqKnowledge® offers a comprehensive array of noninvasive impedance cardiography (ICG) tools for recording parameters associated with virtually any kind of electrical bioimpedance (EBI) monitoring and bioimpedance analysis (BIA). Extracted measures can be displayed as new channels in the recording, or exported to an Excel spreadsheet or Journal file for further analysis. In addition to conventional BIOPAC® data acquisition hardware, record wirelessly with the BioNomadix® BN-NICO system.

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View data in multiple formats

Extracted measures can be displayed as new channels in the recording, or exported to an Excel spreadsheet or Journal file for further analysis.

Two primary methods for extracting impedance cardiography parameters

Automated dZ/dt Classifier and ICG Analysis Routines, Ensemble Averaging

Full suite of tools for extracting advanced measures and cleaning data

Body Surface Area, Derive dZ/dt from Raw Z, Ideal Body Weight, Pre-ejection Period, VEPT

Application Starter Hardware  

Hardware Packages   |   ICG: Impedance Cardiography/Cardiac Output

Hardware Bundles are complete solutions for the specified application. Choose your preferred platform and bundle, then click "Request Pricing" to request an estimate, add/remove items, or complete purchase. If you have questions about specific items, click through to the product web page for details and specifications, or contact your Local Sales contact.






Impedance Cardiography Parameters

AcqKnowledge® includes two primary methods for extracting impedance cardiography parameters (also known as thoracic electrical bioimpedance (TEB)):

Method 1: Automated dZ-dt Classifier and ICG Analysis Routines

dZ-dt ClassifierAcqKnowledge® automatically scores the dZ/dt waveform with event markers indicating appropriate points in the complex to derive additional measures. For a detailed demo, see the ICG dZ-dt Classifier Tutorial Video.

ICG Analysis – Following dZ-dt scoring, apply the automated ICG analysis routine to derive a wide array of impedance and hemodynamic measures, such as pre-ejection period, stroke volume, cardiac output, heart rate, R-R interval, and more. Individual measures can be toggled on or off, allowing a customized subset of measurement data to be included in the output.

AcqKnowledge dz/dt ensemble average

Full list of measures extracted by ICG Analysis:

Acceleration Index (AI)
Cardiac Index (CI)
Cardiac Output (CO)
Heart Rate (HR)
Left Cardiac Work (LCW)
Left Cardiac Work Index (LCWI)
Left Ventricular Ejection Time (LVET)
Pre-ejection Period (PEP)
RR Interval (RR)
Stroke Index (SI)
Stroke Volume (SV)
Systemic Vascular Resistance (SVR) or Total Peripheral Resistance (TPR)
Systemic Vascular Resistance Index (SVRI)
Systolic Time Ratio (STR)
Thoracic Fluid Content (TFC)
Thoracic Fluid Index (TFI)
Velocity Index (VI)
Mean BP (requires additional signal)
Mean CVP (requires additional signal)
Mean PAP (requires additional signal)

Additional Impedance Cardiography tools for extracting advanced measures and cleaning data include:

Body Surface Area – Determine body surface area estimation in square meters for a subject of a given height and weight, using formulas available in the ICG Preferences.
Derive dZ-dt from Raw Z – A convenience utility for working with impedances recorded using the BIOPAC® EBI100C amplifier or the raw impedance output of the BIOPAC® NICO100C module.
Ideal Body Weight – Derive ideal body weight from person’s height, gender and frame size using a number of provided industry-standard methods. (Body Weight computations are configurable in Preferences.) Ideal Body Weight results are always expressed in kilograms.
Pre-ejection Period – Measure the time interval between the electromechanical systole and the onset of ejection of blood from the left ventricle of the heart.
dZ/dt Remove Motion Artifacts – Apply motion artifact removal to a dZ/dt signal. Uses cycle information from an ECG signal to construct a model of the ICG signal containing only the components correlated to the heart rate.
VEPT – Compute the volume of electrically participating tissue (VEPT) in cubic centimeters. This is calculated by entering the height of the subject.

Advanced Features Spotlight


Impedance Cardiography and Cardiac Output

Record and analyze impedance cardiography data Use automated ICG analysis to output key measures Use Ensemble Averaging to view the averaged dZ/dt signal AcqKnowledge offers More...


Peripheral Blood Flow

When used in conjunction with an occluding cuff, electrical bioimpedance measurements on limbs can assess arterial blood flow and venous thrombosis. To prevent venous outflow without More...


Respiration Monitoring

For bioimpedances measured across the thorax using the EBI100C, a small impedance change is observed with each inspiration and expiration. For respiration monitoring, electrodes are More...


Tissue Magnitude and Phase Modeling

The EBI100C measures tissue impedance magnitude and phase simultaneously at any of four operational frequencies (12.5, 25, 50 and 100kHz) for multi-frequency bioimpedance analysis (MFBIA). More...

Electrobioimpedance Impedance Cardiography ICG Amplifier

Tissue Resistance and Reactance Measurement

Tissue resistance is mathematically described as the real part of the tissue impedance and tissue reactance is defined as the imaginary part of the tissue More...


ICG dZ dt Classifier

Ensemble average

AcqKnowledge Ensemble Average Feature

Estimated Cardiac Output from Blood Pressure

Focus Areas | AcqKnowledge Tutorial

EL-CHECK Electrode Impedance Checker


Application Notes

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