TY - JOUR
T1 - Elevated end-diastolic ratio of the common carotid artery due to cerebral arteriovenous malformation
T2 - Two case reports
AU - Tanaka, Koji
AU - Matsumoto, Shoji
AU - Yamada, Takeshi
AU - Kondo, Daisuke
AU - Chihara, Hideo
AU - Koga, Motohisa
AU - Hatano, Taketo
AU - Miyagi, Tomoya
AU - Yamasaki, Ryo
AU - Kira, Jun ichi
N1 - Publisher Copyright:
© 2018 The Authors
PY - 2018/8
Y1 - 2018/8
N2 - An elevated end-diastolic (ED) ratio of the common carotid artery (CCA) is an indicator of occlusive lesions of the distal portion of the internal carotid artery. We report 2 cases of cerebral arteriovenous malformation (AVM) showing an elevated ED ratio of the CCA, which decreased after surgery. Case 1 was a 28-year-old man with chronic recurrent headache with aura, and case 2 was a 29-year-old woman with sudden-onset headache and intracerebral hemorrhage without neurologic abnormality. In both cases, digital subtraction angiography revealed a Spetzler-Martin Grade IV AVM, which was mainly fed by branches of the left middle cerebral artery with venous drainage into superficial and deep cerebral veins. Preoperative carotid ultrasonography showed an elevated CCA ED ratio (1.38 in case 1 and 1.47 in case 2; left > right) without atherosclerotic lesions. Patients’ AVMs were successfully resected. In both cases, the ED ratio was decreased after surgery (to 1.05 in case 1 and 1.20 in case 2). A decrease in vascular resistance on 1 side caused by cerebral AVM can result in an increase in the CCA ED ratio comparable to that of carotid axis occlusion.
AB - An elevated end-diastolic (ED) ratio of the common carotid artery (CCA) is an indicator of occlusive lesions of the distal portion of the internal carotid artery. We report 2 cases of cerebral arteriovenous malformation (AVM) showing an elevated ED ratio of the CCA, which decreased after surgery. Case 1 was a 28-year-old man with chronic recurrent headache with aura, and case 2 was a 29-year-old woman with sudden-onset headache and intracerebral hemorrhage without neurologic abnormality. In both cases, digital subtraction angiography revealed a Spetzler-Martin Grade IV AVM, which was mainly fed by branches of the left middle cerebral artery with venous drainage into superficial and deep cerebral veins. Preoperative carotid ultrasonography showed an elevated CCA ED ratio (1.38 in case 1 and 1.47 in case 2; left > right) without atherosclerotic lesions. Patients’ AVMs were successfully resected. In both cases, the ED ratio was decreased after surgery (to 1.05 in case 1 and 1.20 in case 2). A decrease in vascular resistance on 1 side caused by cerebral AVM can result in an increase in the CCA ED ratio comparable to that of carotid axis occlusion.
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U2 - 10.1016/j.radcr.2018.06.007
DO - 10.1016/j.radcr.2018.06.007
M3 - Article
AN - SCOPUS:85049758716
SN - 1930-0433
VL - 13
SP - 917
EP - 920
JO - Radiology Case Reports
JF - Radiology Case Reports
IS - 4
ER -