How ICG Works
- Current is transmitted through the chest
- Current seeks path of least resistance: the blood filled aorta
- ICG measures the baseline impedance (resistance) to this current
- With each heartbeat, blood volume and velocity in the aorta change
- ICG measures the corresponding change in impedance
- ICG attributes the large change in impedance to the volumetric expansion of the aorta (this is the main difference between ICG and Electrical Cardiometry)
- ICG uses the baseline and changes in impedance to measure and calculate hemodynamic parameters
Read more about this topic: Impedance Cardiography
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