Non-labouring pregnant women hospitalised during their third trimester of pregnancy has an haemodynamic evaluation with Nexfin technology and transthoracic cardiac ultrasonography.

Evaluation is performed in two positions : dorsal decubitus and left lateral decubitus.

continous haemodynamic monitoring is performed with digital Nexfin captor in two positions. in the same time transthoracic cardiac ultrasonography is performed to calculate cardiac output using velocity time index of aortic outflow chamber.

Cardiac output is measured with non-invasive digital Nexfin technology (ml/min) and compared with transthoracic echocardiographic measure of cardiac output (ml/min) used as reference.

Echographic cardiac output (ml/min) is measured as the produce of cross sectional aera of left ventricular outflow track (cm²) multiplied by velocity time index (cm) multiplied by heart rate (beat/min)