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
Famous quotes containing the word works:
“Now they express
All that’s content to wear a worn-out coat,
All actions done in patient hopelessness,
All that ignores the silences of death,
Thinking no further than the hand can hold,
All that grows old,
Yet works on uselessly with shortened breath.”
—Philip Larkin (1922–1986)