The abdominal aorta is the immediate distal continuation of the thoracic part of the descending aorta. At the L4 level, it divides into two common iliac arteries, a.iliaca communis dextra et sinistra, and the central cruciate artery, a.sacralis mediana. One of the more common pathologies that can affect the aorta and iliac arteries is an aneurysm. An aneurysm is an abnormal expansion of the aorta or arteries by 50% of its diameter. Its wall consists of all layers of the artery or aorta. The prevalence is greatly influenced by the geographical area, age, and gender of the population. Treatment of aneurysms of the aorta and iliac arteries may involve open surgery or an endovascular approach. Open aneurysm surgery is considered high-risk surgery with a risk of cardiovascular death or myocardial infarction of ≥5% within 30 days of surgery. Unlike the open approach, EVAR is considered a medium-risk method with a 1 to 5% cardiovascular risk. The EVAR procedure is based on the percutaneous introduction of a stent graft inside the aneurysm under the supervision of diascopy in the angiography room. Like any operative procedure, EVAR also carries the risk of certain complications. Complications can be divided into those related to the endograft and other complications. The most common complication associated with an endograft is an pendoleak, which represents a persistent flow of blood into the residual aneurysmal sac. The frequency rises to 15 to 30% of patients after the intervention. The method of repair will depend on the type of endoleak. More frequent complications also related to the endograft are migration of the endograft, infection of the endograft, bending of the arms of the endograft and/or their occlusion, and collapse of the endograft. Each of the listed complications has its treatment methods. Many of them will require reintervention. Other complications include lower limb ischemia, spinal cord ischemia, pelvic ischemia, renal ischemia, intestinal ischemia, cerebrovascular insult, and post-implantation syndrome. If endovascular access is not possible, a conversion to open surgery can be done. The golden standard of diagnostics in intervention planning and postoperative monitoring of patients is CTA. Ultrasound, more precisely CEUS, is becoming an increasingly important diagnostic method. Its sensitivity and specificity for the assessment of endoleaks are comparable to CTA. Complications are classified according to the CIRSE classification of complications of minimally invasive interventional radiology techniques.