Since November the 30th, 2017, two additional BPs will be taken in a seated position; these will be taken at the beginning of the BP taking session. The patient will be seated comfortably with their right arm resting at the heart level. The BPs, HRs, COs and SVRs will be taken first after one minute of having the patient sit comfortably and then again after two minutes. Later on, the patient will assume the first supine position and the protocol continues as explained previously; however, the interval between the two BPs taken at the supine position will be of one and three minutes.