Vascular complications such as haematoma and pseudoaneurysm are a significant problem in patients undergoing arterial catheterization. Ultrasound-guided compression of the pseudoaneurysm is a non-invasive and efficient therapy. We describe two patients with rare complications. A 59-year old man died of multiple pulmonary embolism after diagnostic cardiac catheterization. A 71-year old female patient developed a deep inguinal skin necrosis after repeated local compression of a pseudoaneurysm formed after therapeutic catheterization.