Neuropathy in the upper extremity after open-heart surgery.

Eleven patients with upper-extremity neurological abnormalities underwent open-heart surgery performed through a median sternotomy incision. Seven of the 11 patients were referred in the routine manner to evaluate and treat the neurological problem. The remaining four were part of a consecutively studied group of 11 patients examined prospectively to determine the possible presence of abnormalities. Two of these four patients were asymptomatic. All lesions could be postulated to occur within the brachial plexus, the most common area being the median cord, but lesions were also noted in the posterior and lateral cords and upper trunk. The etiology of the problem appears to be stretching injury of the brachial plexus from retraction of the sternum, which in turn causes retroclavicular displacement of the clavicle. However, it is possible that an ischemic neuropathy could result from intraarterial procedures in some of our patients. The possibility that neurologic deficit may occur in the upper extremity should be considered by physicians who may have the opportunity to evaluate patients who undergo open-heart surgery.