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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 26:522-524, March 2005
© 2005 American Society of Neuroradiology

Case Report
INTERVENTIONAL

Possible Electrical Stimulation on Rostral Ventrolateral Medulla That Causes Significant Hypertensive and Tachycardic Changes during Endovascular Treatment of a PICA Aneurysm Abutting the Left Medullary Sulcus

Harun Ozer^a, Omer Uzma^b, Sait Albayram^a, Hakan Selcuk^a, Civan Isilak^a and Naci Kocer^a

^a Division of Neuroradiology, Department of Radiology, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey
^b Department of Anesthesiology, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey

Address correspondence to Naci Kocer, MD, Department of Radiology, Division of Neuroradiology, Cerrahpasa Medical School, 34300 Kocamustafapasa, Istanbul, Turkey

Summary: We report the case of a 43-year-old man who underwent endovascular treatment for posterior inferior cerebellar aneurysm. Significant hemodynamic changes were observed as electric stimulation was applied during coil detachment for a PICA aneurysm. We postulate that changes in heart rate and blood pressure during coil detachment were due to the electric stimulation of the tonic vasomotor center located in the rostral ventrolateral medulla, which was very close to the PICA aneurysm.