NON-COMMUNICATING BILATERAL SUPERIOR VENACAVA – A CASE REPORT AND BRIEF LITERATURE REVIEW
Journal Title: IJAR-Indian Journal of Applied Research - Year 2015, Vol 5, Issue 4
Abstract
Abnormalities of the central vascular system are always of extreme interest, on account of the light they cast on many developmental problems.Normal anatomy describes the formation of superior venacava by the union of right and left brachiocephalic veins draining the head and neck area. Presence of bilateral superio-r ven acava was encountered during routine dissection in the Department of Anatomy, Kasturba medical college, Manipal. Right and left superior venacavae were formed as a continuation of respective brachiocephalic veins. The left superior venacava drained into the right atrium via the coronary sinus which was enlarged. No communication was observed between the two venacavae indicating that the right and left halves of the head and upper limb drain back to the heart independently. Persistence of the left anterior cardinal vein and regression or absence of the communicating vein would be the possible embryological explanation for this anomaly. Literature reviews suggest that the frequency of its occurrence is 0.3%-1.3% in general population but higher (10-11%) in people with congenital heart diseases. Although it has no physical derangement per se, may complicate or mislead the placement of cardiac catheters or pacemaker leads. Dilated coronary sinus may cause cardiac arrhythmias due to stretching of the AV node and bundle of His. P- res ence of these anomalies is an indication for the screening of other associated cardiac abnormalities.
Authors and Affiliations
Dr. Pallavi
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