 Before, during and after the infusion the study participants are monitored closely. Blood pressure is measured with conventional brachial blood pressure measurement but also with Finger Plethysmography, which gives a continuous blood pressure assessment. Continuous Impedance Cardiography gives a continuous assessment of cardiac output and together with the blood pressure we are able to estimate total peripheral resistance during the Ang II infusion. In addition blood flow in the central arteries of the abdomen, are measured using Doppler Ultrasound. 