A central vein catheter is essential for monitoring and drug administration in many instances. We report a case of internal jugular vein (IJV) dissection that occurred during central venous catheter insertion. A 78 year old man with two-vessel disease was scheduled to undergo coronary artery bypass surgery at our hospital. Transthoracic echocardiography on admission showed a normal ejection fraction (55%, Mod-Simpson's method) with inferior wall motion abnormalities and mild tricuspid regurgitation. Advanced arteriosclerosis of both carotid arteries was observed during carotid artery ultrasound, but there was no significant stenosis. No abnormalities were found in the IJV. The patient had no abnormalities on lower limb ultrasound, chest abdominal computed tomography (CT), or head CT.
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