Cardiac output (CO) is a key variable when describing the cardiovascular system. Electrical cardiometry (EC) is a non-invasive method in measuring stroke volume and cardiac output. However, its accuracy has been inconsistent. Therefore Martin et al. have compared measurements with echocardiographic measurements and propose calibration with left ventricle outflow tract (LVOT)-measurements obtained from transthoracic echocardiography (TTE). This study was performed in pregnant women at term. Goal of this study is to validate their formula in non-pregnant outpatients undergoing echocardiography for cardiology work-up. Secondary aim is to perform a leg raising test and to compare changes in stroke volume observed with either EC or TTE.