John B. Weigele

Endovascular and surgical treatment of ruptured cerebral aneurysms in pediatric patients.

OBJECTIVEPediatric cerebral aneurysms are rare. There are very few recent studies that focus on the multidisciplinary treatment of ruptured aneurysms. We reviewed our pediatric endovascular and surgical experience with ruptured cerebral aneurysms. METHODSPediatric patients aged 16 years and younger who were admitted with a diagnosis of aneurysmal subarachnoid hemorrhage and treated at the Childrens Hospital of Philadelphia were included in this analysis. RESULTSTwelve patients with 13 aneurysms (4 male patients and 8 female patients; age range, 4 months–16 years; mean age, 5.1 years), were admitted with subarachnoid hemorrhage during the past 12 years. The majority of patients were admitted in good clinical condition; 31% were in Hunt and Hess Grade II, and 31% were in Hunt and Hess Grade III. The remaining patients were in poor clinical condition and were in Hunt and Hess Grade IV (23%) or Grade V (15%). Computed tomography revealed that 15% of the patients were in Fisher Grade 2, 23% were in Fisher Grade 3, and 62% were in Fisher Grade 4. Endovascular techniques were used in the treatment of 5 aneurysms, and microsurgery was used in the treatment of 8 aneurysms. In the endovascular group, aneurysm sizes ranged from 2 to 35 mm (mean, 12.6 mm); 3 aneurysms were in the anterior circulation, and 2 were in the posterior circulation. In the microsurgery group, 6 aneurysms were in the anterior circulation, and 2 were in the posterior circulation; sizes ranged from 3 to 15 mm (mean, 6.8 mm). Sixty-nine percent of the patients were independent at follow-up. CONCLUSIONContemporary endovascular and microsurgical techniques can be used effectively to treat ruptured cerebral aneurysms in pediatric patients. In the time period studied, the techniques were equally effective when used in the appropriate patients.

Middle cerebral artery vasospasm: transcranial color-coded duplex sonography versus conventional nonimaging transcranial Doppler sonography.

Objective:To prospectively compare accuracies of transcranial color-coded duplex sonography (TCCS) and transcranial Doppler sonography (TCD) in the diagnosis of middle cerebral artery (MCA) vasospasm. Design:Prospective blinded head-to-head comparison TCD and TCCS methods using digital subtraction angiography (DSA) as the reference standard. Setting:Department of Radiology in a tertiary university health center in a metropolitan area. Patients:Eighty-one consecutive patients (mean age, 53.9 ± 13.9 years; 48 women). The indication for DSA was subarachnoid hemorrhage in 71 patients (87.6%), stroke or transient ischemic attack in five patients (6.2%), and other reasons in five patients (6.2%). Interventions:The MCA was graded as normal, narrowed <50%, and >50% using DSA. The accuracy of ultrasound methods was estimated by total area (Az) under receiver operator characteristic curve. To compare sensitivities of ultrasound methods, McNemar’s test was used with mean velocity thresholds of 120 cm/sec for the detection of less advanced, and 200 cm/sec for the more advanced MCA narrowing. Measurements and Main Results:Angiographic MCA narrowing ≤50% was found in 21, and >50% in 10 of 135 arteries. Accuracy of TCCS was insignificantly higher than that of TCD in the detection of ≤50% and >50% narrowing, total Az for mean velocity being 0.83 ± 0.05, 0.77 ± 0.05, and 0.95 ± 0.02, 0.86 ± 0.08, respectively. Sensitivity of TCCS at commonly used threshold of 120 cm/sec for less advanced MCA spasm was significantly better than that of TCD at similar specificity, 55% vs. 39%, p = 0.038, whereas at a threshold of 200 cm/sec used for more advanced spasm, sensitivities and specificities of both methods were not different. Conclusion:The accuracy of TCCS and TCD is similar, but TCCS is more sensitive than TCD in the detection of MCA spasm. Sensitivity of both techniques in the detection of mild and more advanced spasm using 120 cm/sec and 200 cm/sec thresholds, respectively, is poor; however, a larger sample is required to increase precision of our sensitivity estimates.

Suitability of Temporal Bone Acoustic Window: Conventional TCD Versus Transcranial Color‐Coded Duplex Sonography

To determine whether the proportion of patients with suitable temporal bone acoustic windows is different for conventional transcranial Doppler sonography (TCD) and transcranial color‐coded duplex sonography (TCCS), based on a head‐to‐head comparison in the same population of patients.

Lumbar vertebral hemangioma presenting with the acute onset of neurological symptoms : Case report

Vertebral hemangiomas are common entities that rarely present with neurological deficits. The authors report the unusual case of a large L-3 vertebral hemangioma with epidural extension in a 27-year-old woman who presented with hip flexor and quadriceps weakness, foot drop, and leg pain. The characteristics of the mass on magnetic resonance imaging suggested an aggressive, hypervascular lesion. The patient underwent embolization of the lesion followed by direct intralesional injection of ethanol. Significant resolution of clinical symptoms was observed immediately after the procedure and at her follow-up visits. Follow-up imaging studies obtained 9 months after the procedure also documented a considerable reduction in the size of the hemangioma with minimal loss of vertebral height and a mild kyphosis at the affected level. On repeated imaging studies obtained 21 months postoperatively, the size of the hemangioma and the degree of vertebral body compression were stable. As demonstrated in this case, patients with vertebral hemangiomas can present with acute nerve root compression and signs and symptoms similar to those of disc herniation. Vertebral hemangiomas can be treated effectively with interventional techniques such as embolization and ethanol injection.

Intra-arterial papaverine used to treat cerebral vasospasm reduces brain oxygen.

IntroductionIntra-arterial papaverine (IAP) is used to treat symptomatic cerebral vasospasm following aneurysmal subarachnoid hemorrhage (SAH). IAP, however, can increase intracranial pressure (ICP). In this study we examined whether IAP alters brain oxygen (BtO2).MethodsPoor clinical grade (Hunt & Hess IV or V) SAH patients who underwent continuous ICP and BtO2 monitoring during IAP infusion for symptomatic cerebral vasospasm were evaluated as part of a prospective observational study.ResultsData are available for five patients (median age 58) who received IAP for cerebral vasospasm 4 to 7 days after SAH. In each patient, angiographic vasospasm was improved on postinfusion angiogram. Mean ICP before IAP was 23.04±1.18 mmHg; it increased immediately after IAP infusion and remained elevated (29.89±1.18 mmHg; p<0.05) during IAP and for approximately 10 minutes after IAP ended. Baseline mean arterial pressure (MAP) was 110.55±1.36 mmHg. During IAP treatment MAP remained stable (110.90±2.00 mmHg; p=0.31). Mean BtO2 before IAP was 32.99±1.45 mmHg. There was a significant BtO2 decrease in all patients during IAP to a mean of 22.96±2.9 mmHg (p<0.05). BtO2 returned to baseline within 10 minutes after IAP ended. There was a modest relationship between the ICP increase and BtO2 decrease (R2=0.526).ConclusionIAP infusion to treat cerebral vasospasm following SAH can increase ICP and reduce BtO2. The IAP-induced reduction in BtO2 may help explain why IAP, although it reverses arterial narrowing, does not improve patient outcome.

Rheolytic Thrombectomy for Cerebral Sinus Thrombosis

IntroductionCerebral venous and sinus thrombosis (CVST) is an uncommon cause of stroke that is associated with poor outcomes in high-risk patients who present with stupor or coma, rapidly progressive neurologic deficits or progressive neurologic deficits during therapeutic anticoagulation.Methods and ResultsWe report the rapid treatment of CVST in six patients at high risk for poor outcomes (death or dependency) using rheolytic thrombectomy combined with locally administered low-dose recombinant tissue plasminogen activator (rt-PA), and review the literature on rheolytic thrombectomy for CVST. All of the procedures were technically successful. No complications occurred. Two patients experienced partial rethrombosis following rheolytic thrombectomy requiring a second treatment. Preexisting hemorrhagic infarcts in two patients remained stable. Two of six patients experienced excellent clinical outcomes. Two had good outcomes. There were two deaths from irreversible cerebral injury caused by extensive CVST that had occurred prior to the endovascular treatments. In 24 cases of rheolytic thrombectomy for CVST that were reviewed from this series and previously published reports, the large majority of patients experienced good to excellent clinical outcomes.ConclusionsExtensive CVST in high-risk patients can be rapidly fatal. Rheolytic thrombectomy combined with locally administered, low-dose recombinant tissue plasminogen activator (rt-PA) is a safe and effective endovascular method to rapidly recanalize the intracranial dural sinuses in high-risk patients with CVST.

Intracranial vertebrobasilar artery dissection associated with postpartum angiopathy.

Background. Cervicocephalic arterial dissection (CCAD) is rare in the postpartum period. To our knowledge this is the first reported case of postpartum angiopathy (PPA) presenting with ischemic stroke due to intracranial arterial dissection. Case. A 41-year-old woman presented with blurred vision, headache, and generalized seizures 5 days after delivering twins. She was treated with magnesium for eclampsia. MRI identified multiple posterior circulation infarcts. Angiography identified a complex dissection extending from both intradural vertebral arteries, through the basilar artery, and into both posterior cerebral arteries. Multiple segments of arterial dilatation and narrowing consistent with PPA were present. Xenon enhanced CT (Xe-CT) showed reduced regional cerebral blood flow that is improved with elevation in blood pressure. Conclusion. Intracranial vertebrobasilar dissection causing stroke is a rare complication of pregnancy. Eclampsia and PPA may play a role in its pathogenesis. Blood pressure management may be tailored using quantitative blood flow studies, such as Xe-CT.

Admission angiographic cerebral circulation time may predict subsequent angiographic vasospasm after aneurysmal subarachnoid hemorrhage.

OBJECTIVEAngiographic cerebral vasospasm occurs in approximately 70% of patients hospitalized after aneurysmal subarachnoid hemorrhage (SAH) and is associated with poor outcome. In this study, we examined whether or not cerebral circulation time (CCT) measured with digital subtraction angiography was associated with angiographic vasospasm. METHODSPatients who underwent cerebral angiography within 24 hours of SAH were analyzed. Contrast dye transit time from the arterial to the venous phase was measured to obtain CCT (supraclinoid internal carotid artery to parietal cortical veins) and microvascular CCT (cortical middle cerebral artery to parietal cortical veins). Patients with ruptured anterior circulation aneurysms and vasospasm on follow-up angiography (Group A) were compared with patients with SAH without vasospasm (Group B) and with normal control subjects (Group C). RESULTSThere were 20 patients in Group A (mean age, 51 ± 13 yr), 17 patients in Group B (56 ± 12 yr), and 98 patients in Group C (52 ± 12 yr). CCT in patients in Group A (7.7 ± 1.9 s) was significantly longer than those in Groups B (6.6 ± 1.2 s; P = 0.005) and C (5.9 ± 1 s; P < 0.001). Microvascular CCT in patients in Group A (7.1 ± 1.8 s) was significantly longer than those in Groups B (6.1 ± 1.2 s; P = 0.003) and C (5.4 ± 0.9 s; P < 0.001). CONCLUSIONProlonged CCT, a measurement of increased small vessel resistance, can be identified within 24 hours after SAH and is associated with subsequent angiographic vasospasm. These results suggest that microcirculation changes may be involved in vasospasm.

Peripheral aneurysms of the lateral posterior choroidal artery: clinical presentation and endovascular treatment: report of two cases.

OBJECTIVE AND IMPORTANCE To describe the clinical presentation and endovascular management of peripheral aneurysms of the lateral posterior choroidal artery. Aneurysms in this location are exceptionally rare and optimal treatment may be difficult. CLINICAL PRESENTATION Two patients with peripheral aneurysms of the distal portion of the lateral posterior choroidal artery presented with headaches from extensive intraventricular hemorrhage. INTERVENTION Endovascular surgical therapy by use of superselective n-butylcyanoacrylate embolization of the aneurysm and adjacent distal parent artery was successful in both patients. CONCLUSION Patients with peripheral aneurysms of the lateral posterior choroidal artery usually present with intraventricular hemorrhage. They may be difficult to treat by open surgical techniques owing to their intraventricular location and the frequent inability to preserve the parent artery by aneurysm clipping. Instead, it is typical that either proximal parent artery occlusion or aneurysm trapping must be used. An equivalent endovascular surgical technique may be an attractive alternative method of management.

Stroke associated with Barth syndrome.

Barth syndrome is an inherited disorder characterized by dilated cardiomyopathy, neutropenia, growth retardation, and skeletal myopathy. We describe a case of acute stroke owing to Barth syndrome that required intra-arterial thrombolysis. This case suggests that cardiovascular complications can be observed in patients with Barth syndrome. Stroke prevention measures, including the use of antithrombotic agents, might be warranted. (J Child Neurol 2006;21:805—807; DOI 10.2310/7010.2006.00177).