Right aortic arch with isolated left brachiocephalic artery.

Right aortic arch with complete isolation of the left brachiocephalic artery is an extremely uncommon anomaly of the aortic arch. This case reports the hitherto unreported association of the right aortic arch with isolated left brachiocephalic artery presenting with a subclavian steal syndrome detected in a 36-year-old female patient being investigated for increasing attacks of episodic dizziness, vertigo, and left upper limb claudication spanning 1 year. A review of the literature relevant to this condition is presented. It is likely that with advances in imaging techniques and a wider clinical usage of these investigative modalities there will be further recognition of these uncommon conditions. Copyright 2001 Wiley-Liss, Inc.