|Ankle-brachial index – an indicator of chronic arterial insufficiency of the lower limbs in computed tomography angiography|
- Georgiev, K. Velkova, N. Sirakov
|Atherosclerosis is the most common reason for the occurrence of chronic arterial insufficiency of the lower limbs. As a consequence of the atherosclerose of the vessels of the lower limb, blood flow is decreased, particularly during exercise. This leads to the emergence of many symptoms ranging from intermittent claudication to pain even at rest. Clinically 4 forms can be observed: asymptomati , intermittent claudication, chronic and acute . Measurement of ankle-brachial index (ABI) is a physical method that determines the ratio of systolic blood pressure measured at the ankle compared to that measured at the brachial artery. Normal values for healthysubjects are above 0,9. The measurement of the ABI is able to give good guidance to the clinician not only for revealing asymptomatic form of the disease. Included in the routine protocol for conducting CTA ofthe lower limbs it can provide valuable information and for the radiologyst, and can help in planning the approach to patients suffering from clinically visible symptoms.
Key words: CHRONIC ARTERIAL INSUFFICIENCY OF THE LOWER LIMBS. ANKLE-BRACHIAL INDEX (ABI). COMPUTEDTOMOGRAPHY ANGIOGRAPHY (CTA)