Comparison of cardiac index measurements in intensive care patients using continuous wave vs. pulsed wave echo-Doppler compared to pulse contour cardiac output

Intensive Care Medicine Experimental

Table 2 Summary of cardiac index results including mean, standard deviation, range and absolute difference with PiCCO mean

Measurement	No.	Mean (L/min/m²)	Standard deviation (L/min/m²)	Range (L/min/m²)
CW-VTI CI	52	2.70	0.92	0.78, 5.11
PW-VTI CI	52	2.33	0.90	0.77, 5.40
PiCCO CI	52	2.86	0.93	1.50, 5.56

Measurement	Absolute difference with PiCCO Mean ± Standard deviation (L/min/m²)	P value
CW-VTI CI	0.47 ± 0.43	0.07
PW-VTI CI	0.61 ± 0.41

N number of patients; CI cardiac index; CW-VTI continuous-wave velocity time integral; CW-VTI pulsed-wave velocity time integral; PiCCO pulse contour cardiac output