Vascular complications during an ulnar procedure are very rare. However, they must be identified quickly. We repport a case of a 68-year-old hypertensive patient who was admitted to the emergency department for unstable angina, where she underwent coronary angioplasty via the left ulnar route. she was referred to us for management of a pseudoaneurysm on the inside of the wrist facing the ulnar artery one month later.