A 21 year old man was referred for evaluation and endovascular treatment of aortic coarctation. Conventional aortography demonstrated a high grade, postductal aortic coarctation distal to the origin of the left subclavian artery with a delayed opacification of the post-coarctation descending thoracic aorta both via the stenosis and via collateral pathways. When starting the endovascular procedure, the patient perceived sudden …