Critical Care Research and Practice

Clinical Study

Volumetric and End-Tidal Capnography for the Detection of Cardiac Output Changes in Mechanically Ventilated Patients Early after Open Heart Surgery

Table 2

Haemodynamic data at baseline and during right ventricular pacing and passive leg raise.


	BL	VP	value	BL	PLR	value

CO (l/min)	4.86 ± 1.20	3.84 ± 1.08	<0.001	4.72 ± 1.17	5.65 ± 1.26	<0.001
SV (mL/min)	71 ± 20	54 ± 17	<0.001	69 ± 17	81 ± 19	<0.001
VtCO₂ (ml)	17 ± 3	15 ± 3	<0.001	16 ± 3	18 ± 4	<0.001
EtCO₂ (kPa)	4.3 ± 0.3	4.1 ± 0.4	<0.001	4.3 ± 0.3	4.5 ± 0.3	<0.001
MAP (mmHg)	72 ± 6	62 ± 9	<0.001	72 ± 9	78 ± 8	<0.001
HR (beats/min)	69 ± 10	73 ± 10	<0.001	70 ± 10	71 ± 10	0.015

Data are presented in mean ± SD. BL = baseline; RVP = ventricular pacing; PLR = passive leg raise; CO = cardiac output; SV = stroke volume; VtCO₂ = exhaled carbon dioxide per tidal volume; EtCO₂ = end-tidal carbon dioxide; MAP = mean arterial pressure (measurements from 21 patients); HR = heart rate.