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Cerebral hyperperfusion syndrome after superficial temporal artery-middle cerebral artery bypass for severe intracranial steno-occlusive disease: a case control study. 2013

Kejia Teo, and David K S Choy, and Sein Lwin, and Chou Ning, and Tseng Tsai Yeo, and Liang Shen, and Vincent F Chong, and Hock L Teoh, and Raymond C Seet, and Bernard P L Chan, and Arvind K Sharma, and Vijay K Sharma
Division of Neurosurgery, National University Hospital, Singapore.

BACKGROUND Intracranial stenoses carry increased risk for cerebral ischemia. We perform external carotid-internal carotid (EC-IC) artery bypass in our patients with severe stenosis of the intracranial internal carotid (ICA) or middle cerebral artery (MCA) with impaired cerebral vasodilatory reserve (CVR). OBJECTIVE To evaluate cerebral hemodynamics and cerebral hyperperfusion syndrome (HPS) in patients who develop focal neurological deficits after EC-IC bypass surgery. METHODS Patients with severe intracranial ICA or MCA stenosis and impaired CVR on transcranial Doppler (TCD) derived breath-holding index (BHI) were evaluated with acetazolamide-challenged technetium-99m hexamethylpropyleneamineoxime-single-photon emission computed tomography (SPECT). EC-IC bypass surgery was offered to patients with impaired CVR on SPECT. Close monitoring was performed in patients developing focal neurological deficits within 7 days of surgery. RESULTS Of 112 patients with severe intracranial ICA/MCA stenosis, 77 (69%) showed impaired CVR and 46 (41%) underwent EC-IC bypass. Transient neurological deficits within 7 days of surgery developed in 8 (17%). HPS was confirmed by CT perfusion and/or SPECT in 7 cases. A strong correlation was observed between HPS and preoperative TCD-BHI values (0%, 6.3%, and 41% in patients with BHI 0.3-0.69, 0-0.3 and <0, respectively; P = .012). HPS patients showed more than a 50% increase in MCA flow velocity on TCD (compared with preoperative values) on the operated side (63.3% vs 3.3% on control side, P < .001). Meticulous control of blood pressure and hydration led to rapid and complete resolution of neurological deficits in all cases. CONCLUSIONS Symptomatic cerebral HPS is common in the early postoperative period after EC-IC bypass surgery. Early diagnosis and appropriate management might prevent the complications of this syndrome.

UI MeSH Term Description Entries
D011183 Postoperative Complications Pathologic processes that affect patients after a surgical procedure. They may or may not be related to the disease for which the surgery was done, and they may or may not be direct results of the surgery. Complication, Postoperative,Complications, Postoperative,Postoperative Complication
D001921 Brain The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM. Encephalon
D002539 Cerebral Arterial Diseases Pathological conditions of intracranial ARTERIES supplying the CEREBRUM. These diseases often are due to abnormalities or pathological processes in the ANTERIOR CEREBRAL ARTERY; MIDDLE CEREBRAL ARTERY; and POSTERIOR CEREBRAL ARTERY. Cerebral Artery Diseases,Arterial Diseases, Cerebral,Arterial Disease, Cerebral,Artery Disease, Cerebral,Artery Diseases, Cerebral,Cerebral Arterial Disease,Cerebral Artery Disease,Disease, Cerebral Arterial,Disease, Cerebral Artery,Diseases, Cerebral Arterial,Diseases, Cerebral Artery
D002545 Brain Ischemia Localized reduction of blood flow to brain tissue due to arterial obstruction or systemic hypoperfusion. This frequently occurs in conjunction with brain hypoxia (HYPOXIA, BRAIN). Prolonged ischemia is associated with BRAIN INFARCTION. Cerebral Ischemia,Ischemic Encephalopathy,Encephalopathy, Ischemic,Ischemia, Cerebral,Brain Ischemias,Cerebral Ischemias,Ischemia, Brain,Ischemias, Cerebral,Ischemic Encephalopathies
D002560 Cerebrovascular Circulation The circulation of blood through the BLOOD VESSELS of the BRAIN. Brain Blood Flow,Regional Cerebral Blood Flow,Cerebral Blood Flow,Cerebral Circulation,Cerebral Perfusion Pressure,Circulation, Cerebrovascular,Blood Flow, Brain,Blood Flow, Cerebral,Brain Blood Flows,Cerebral Blood Flows,Cerebral Circulations,Cerebral Perfusion Pressures,Circulation, Cerebral,Flow, Brain Blood,Flow, Cerebral Blood,Perfusion Pressure, Cerebral,Pressure, Cerebral Perfusion
D002561 Cerebrovascular Disorders A spectrum of pathological conditions of impaired blood flow in the brain. They can involve vessels (ARTERIES or VEINS) in the CEREBRUM, the CEREBELLUM, and the BRAIN STEM. Major categories include INTRACRANIAL ARTERIOVENOUS MALFORMATIONS; BRAIN ISCHEMIA; CEREBRAL HEMORRHAGE; and others. Brain Vascular Disorders,Intracranial Vascular Disorders,Vascular Diseases, Intracranial,Cerebrovascular Diseases,Cerebrovascular Insufficiency,Cerebrovascular Occlusion,Brain Vascular Disorder,Cerebrovascular Disease,Cerebrovascular Disorder,Cerebrovascular Insufficiencies,Cerebrovascular Occlusions,Disease, Cerebrovascular,Diseases, Cerebrovascular,Insufficiencies, Cerebrovascular,Insufficiency, Cerebrovascular,Intracranial Vascular Disease,Intracranial Vascular Diseases,Intracranial Vascular Disorder,Occlusion, Cerebrovascular,Occlusions, Cerebrovascular,Vascular Disease, Intracranial,Vascular Disorder, Brain,Vascular Disorder, Intracranial,Vascular Disorders, Brain,Vascular Disorders, Intracranial
D006439 Hemodynamics The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM. Hemodynamic
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013577 Syndrome A characteristic symptom complex. Symptom Cluster,Cluster, Symptom,Clusters, Symptom,Symptom Clusters,Syndromes
D013699 Temporal Arteries Arteries arising from the external carotid or the maxillary artery and distributing to the temporal region. Arteries, Temporal,Artery, Temporal,Temporal Artery

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