Early brain-stem auditory evoked responses in vertebrobasilar transient ischemic attacks
S. A. Factor and M. P. Dentinger
Brain-stem auditory evoked response (BAER) studies were performed one to 16
days after a vertebrobasilar transient ischemic attack (VB TIA) in eight
patients and repeated two to 16 days later in six of them. Initially, all
showed absence of waveforms, prolonged interpeak latencies, and/or
amplitude reduction. Five of six patients showed reversal of BAER changes
to normal; the remaining patient returned to near normal. Normalization
occurred six to 24 days after the VB TIA. These results are different from
those reported in other studies. Early sequential BAER studies may be
helpful in differentiating VB TIA from brain-stem infarction and syndromes
that mimic VB TIA.