Cardiac Output (Co) - GE Logiq 500 User Manual

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General Calculations

Cardiac Output (CO)

To measure CO (Cardiac Output), a velocity measurement is

taken in the Doppler Spectrum. An FCA (Flow Cross Sectional

Area) is measured on the vessel in B-Mode. These two

measurements are used to calculate SV (Stroke Volume).

Finally, a HR (Heart Rate) measurement is taken in the Doppler

Spectrum. SV and HR are then used to calculate cardiac

Figure 8–2. General Calculations Sub-Menu (CO)

Select CO from the Calculation Sub-Menu. The trace cursor

(horizontal dotted line) appears in the Doppler spectrum.

See Stroke Volume Ratio on 8–5 for a step-by-step procedure

on SV. After the stroke volume measurements have been

completed, a vertical line cursor appears in the Doppler

spectrum. Measure the Heart Rate. Refer to the procedure

found on 10–30 .

CO (Cardiac Output) is computed from the SV and HR values

and is displayed.

Automatic CO calculation

If the following measurements have previously been made in

any order, CO (Cardiac Output) automatically calculates when it

is selected from the Calculation Sub-Menu:

Velocity in Doppler Mode

Functional Cross Sectional Area in B-Mode

(Circumference/Area)

Heart Rate in Doppler Mode

500 Basic Users Manual

2233658–100 Rev. 0