Index Ankle / Brachial (ITB) The ABI is calculated by the ratio of systolic blood pressure (SBP) of the posterior tibial artery or dorsalis pedis artery with higher SBP brachial or radial artery (calculated on both hemisphere). With the patient positioned supine for implementation of these measures. The PAS in both regions will be determined by means of aneroid sphygmomanometer brand "Premium®" and Doppler Vascular Portable - DV 600, brand "Martec Med®."