scholarly journals Diagnostic Accuracy of Simulated Low-Dose Perfusion CT to Detect Cerebral Perfusion Impairment after Aneurysmal Subarachnoid Hemorrhage: A Retrospective Analysis

Radiology ◽  
2018 ◽  
Vol 287 (2) ◽  
pp. 643-650 ◽  
Author(s):  
Saif Afat ◽  
Carolin Brockmann ◽  
Omid Nikoubashman ◽  
Marguerite Müller ◽  
Kolja M. Thierfelder ◽  
...  
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Diagnostic Accuracy ◽  
Retrospective Analysis ◽  
Cerebral Perfusion ◽  
Low Dose ◽  
Aneurysmal Subarachnoid Hemorrhage ◽  
Perfusion Ct

scholarly journals The venous delay phenomenon in computed tomography angiography: a novel imaging outcome predictor for poor cerebral perfusion after severe aneurysmal subarachnoid hemorrhage

2018 ◽  
Vol 129 (4) ◽  
pp. 876-882 ◽  
Author(s):  
Po-Chuan Hsieh ◽  
Yi-Ming Wu ◽  
Alvin Yi-Chou Wang ◽  
Ching-Chang Chen ◽  
Chien-Hung Chang ◽  
...  
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Cerebral Perfusion ◽  
Aneurysmal Subarachnoid Hemorrhage ◽  
Multivariable Analysis ◽  
Outcome Predictor ◽  
Treatment Results ◽  
Tertiary Referral Center ◽  
Poor Grade ◽  
Poor Outcome ◽  
Delay Phenomenon

OBJECTIVEDiverse treatment results are observed in patients with poor-grade aneurysmal subarachnoid hemorrhage (aSAH). Significant initial perfusion compromise is thought to predict a worse treatment outcome, but this has scant support in the literature. In this cohort study, the authors correlate the treatment outcomes with a novel poor-outcome imaging predictor representing impaired cerebral perfusion on initial CT angiography (CTA).METHODSThe authors reviewed the treatment results of 148 patients with poor-grade aSAH treated at a single tertiary referral center between 2007 and 2016. Patients with the “venous delay” phenomenon on initial CTA were identified. The outcome assessments used the modified Rankin Scale (mRS) at the 3rd month after aSAH. Factors that may have had an impact on outcome were retrospectively analyzed.RESULTSCompared with previously identified outcome predictors, the venous delay phenomenon on initial CTA was found to have the strongest correlation with posttreatment outcomes on both univariable (p < 0.0001) and multivariable analysis (OR 4.480, 95% CI 1.565–12.826; p = 0.0052). Older age and a higher Hunt and Hess grade at presentation were other factors that were associated with poor outcome, defined as an mRS score of 3 to 6.CONCLUSIONSThe venous delay phenomenon on initial CTA can serve as an imaging predictor for worse functional outcome and may aid in decision making when treating patients with poor-grade aSAH.

Positron Emission Tomographic Cerebral Perfusion Disturbances and Transcranial Doppler Findings among Patients with Neurological Deterioration after Subarachnoid Hemorrhage

Neurosurgery ◽  
2003 ◽  
Vol 52 (5) ◽  
pp. 1017-1024 ◽  
Author(s):  
Pawan S. Minhas ◽  
David K. Menon ◽  
Piotr Smielewski ◽  
Marek Czosnyka ◽  
Peter J. Kirkpatrick ◽  
...  
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Carotid Artery ◽  
Cerebral Perfusion ◽  
Internal Carotid ◽  
Aneurysmal Subarachnoid Hemorrhage ◽  
Neurological Deficits ◽  
Positron Emission Tomographic ◽  
Positron Emission ◽  
Arterial Vasospasm ◽  
The Mean

Abstract OBJECTIVE After aneurysmal subarachnoid hemorrhage, approximately 30% of patients experience delayed neurological deficits, related in part to arterial vasospasm and dysautoregulation. Transcranial Doppler (TCD) ultrasonography is commonly used to noninvasively detect arterial vasospasm. We studied cerebral perfusion patterns and associated TCD indices for 25 patients who developed clinical signs of delayed neurological deficits. METHODS Patients were treated in a neurosurgical intensive care unit and were studied if they exhibited delayed focal or global neurological deterioration. Positron emission tomographic cerebral blood flow (CBF) studies and TCD studies measuring the mean flow velocity (FV) of the middle cerebral artery and the middle cerebral artery FV/internal carotid artery FV ratio (with the internal carotid artery FV being measured extracranially at the cranial base) were performed. Glasgow Outcome Scale scores were assessed at 6 months. RESULTS A markedly heterogeneous pattern of CBF distribution was observed, with hyperemia, normal CBF values, and reduced flow being observed among patients with delayed neurological deficits. TCD indices were not indicative of the cerebral perfusion findings. The mean CBF value was slightly lower for patients who did not survive (32.3 ml/100 g/min), compared with those who did survive (36.0 ml/100 g/min, P= 0.05). CONCLUSION Among patients who developed delayed neurological deficits after aneurysmal subarachnoid hemorrhage, a wide range of cerebral perfusion disturbances was observed, calling into question the traditional concept of large-vessel vasospasm. Commonly used TCD indices do not reflect cerebral perfusion values.

Dynamic perfusion computerized tomography in cerebral vasospasm following aneurysmal subarachnoid hemorrhage: a comparison with technetium-99m–labeled ethyl cysteinate dimer–single-photon emission computerized tomography

2006 ◽  
Vol 104 (3) ◽  
pp. 404-410 ◽  
Author(s):  
Gill E. Sviri ◽  
Ali H. Mesiwala ◽  
David H. Lewis ◽  
Gavin W. Britz ◽  
Andrew Nemecek ◽  
...  
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Computerized Tomography ◽  
Single Photon ◽  
Aneurysmal Subarachnoid Hemorrhage ◽  
Brain Regions ◽  
Perfusion Ct ◽  
Ct Scans ◽  
Ethyl Cysteinate Dimer ◽  
The Mean ◽  
Spect Images

Object The aim of this study was to correlate cerebral blood flow (CBF) and mean transient time (MTT) measured on dynamic perfusion computerized tomography (CT) with CBF using 99mTc ethyl cysteinate dimer–single-photon emmision computerized tomography (SPECT) in patients with cerebral vasospasm following aneurysmal subarachnoid hemorrhage (SAH). Methods Thirty-five patients with vasospasm following aneurysmal SAH (12 men and 23 women with a mean age of 49.3 ± 10.1 years) underwent imaging studies; thus, 35 perfusion CT scans and 35 SPECT images were available for comparison. The CBF and MTT values in 12 different brain regions were defined relative to the interhemispheric occipital cortex values using perfusion CT scans and were compared with qualitative relative (rel)CBF estimated on SPECT images. In brain regions with normal, mild (relCBF 71–85%), moderate (relCBF 50–70%), and severe (relCBF < 50%) hypoperfusion on SPECT, the mean relCBF values measured on perfusion CT were 1.01 ± 0.08, 0.82 ± 0.22, 0.6 ± 0.15, and 0.32 ± 0.08, respectively (p < 0.0001); the mean relMTT values were 1.04 ± 0.14, 1.4 ± 0.31, 2.16 ± 0.46, and 3.3 ± 0.54, respectively (p < 0.0001). All but one brain region (30 regions) with severe hypoperfusion on SPECT images demonstrated relCBF values less than 0.6 and relMTT values greater than 2.5 on perfusion CT scans. Conclusions Relative CBF and MTT values on perfusion CT showed a high concordance rate with estimated relCBF on SPECT in patients with vasospasm following aneurysmal SAH. Given its logistical advantages, perfusion CT may be a valuable method of assessing perfusion abnormality in the acute setting of vasospasm and in patients with an unstable condition following aneurysmal SAH.

Pulmonary function and radiographic abnormalities related to neurological outcome after aneurysmal subarachnoid hemorrhage

1998 ◽  
Vol 88 (1) ◽  
pp. 28-37 ◽  
Author(s):  
Andreas Gruber ◽  
Andrea Reinprecht ◽  
Harald Görzer ◽  
Peter Fridrich ◽  
Thomas Czech ◽  
...  
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Lung Injury ◽  
Pulmonary Function ◽  
Neurological Outcome ◽  
Cerebral Perfusion ◽  
Perfusion Pressure ◽  
Aneurysmal Subarachnoid Hemorrhage ◽  
Medical Complications ◽  
Content Type ◽  
Fine Print

Object. This observational study is based on a consecutive series of 207 patients with aneurysmal subarachnoid hemorrhage who were treated within 7 days of their most recent bleed. The purpose of the study was to evaluate the effect of respiratory failure on neurological outcome. Methods. Pulmonary function was assessed by determination of parameters describing pulmonary oxygen transport and exchange, by using composite scores for quantification of lung injury (lung injury score [LIS]) and mechanical ventilator settings (PIF score). Pulmonary function was related to the Hunt and Hess (H & H) grade assigned to the patient at hospital admission (p < 0.001). The pattern and time course of lung injury differed significantly between patients with H & H Grade I or II, Grade III, and Grade IV or V. Hunt and Hess grade, Fisher computerized tomography grade, intracranial pressure, cerebral perfusion pressure, LIS, ratio of PaO2 to the fraction of inspired oxygen (FiO2), and the ratio of the alveolar-minus-arterial oxygen tension difference (AaDO2) to FiO2 were related to neurological outcome (p < 0.001). The LIS on the day of maximum lung injury remained an independent predictor of outcome (p = 0.01) in a stepwise logistic regression analysis. The probability of poor neurological outcome significantly increased with both decreasing cerebral perfusion pressure and increasing severity of lung injury. Conclusions. The overall mortality rate was 22.2% (46 of 207 patients). Subarachnoid hemorrhage and its neurological sequelae accounted for the principal mortality in this series. Medical (nonneurological and nontreatment-related) complications accounted for 37% of all deaths. Systemic inflammatory response syndrome with associated multiple organ dysfunction syndrome was the leading cause of death from medical complications. The authors conclude that respiratory failure is related to neurological outcome, although it is not commonly the primary cause of death from medical complications.

High-Dose Nadroparin Following Endovascular Aneurysm Treatment Benefits Outcome After Aneurysmal Subarachnoid Hemorrhage

Neurosurgery ◽  
2017 ◽  
Vol 83 (2) ◽  
pp. 281-287 ◽  
Author(s):  
Rene Post ◽  
IJsbrand A.J Zijlstra ◽  
Rene van den Berg ◽  
Bert A Coert ◽  
Dagmar Verbaan ◽  
...  
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Dose Group ◽  
Low Dose ◽  
Aneurysmal Subarachnoid Hemorrhage ◽  
Controlled Trial ◽  
Delayed Cerebral Ischemia ◽  
Neurological Status ◽  
High Dose ◽  
Aneurysm Treatment ◽  
Significant Difference

Abstract BACKGROUND Delayed cerebral ischemia (DCI) is one of the major causes of delayed morbidity and mortality in patients with aneurysmal subarachnoid hemorrhage (aSAH). OBJECTIVE To evaluate the effect of high-dose nadroparin treatment following endovascular aneurysm treatment on the occurrence of DCI and clinical outcome. METHODS Medical records of 158 adult patients with an aSAH were retrospectively analyzed. Those patients treated endovascularly for their ruptured aneurysm were included in this study. They received either high-dose (twice daily 5700 AxaIE) or low-dose (once daily 2850 AxaIE) nadroparin treatment after occlusion of the aneurysm. Medical charts were reviewed and imaging was scored by 2 independent neuroradiologists. Data with respect to in-hospital complications, peri-procedural complications, discharge location, and mortality were collected. RESULTS Ninety-three patients had received high-dose nadroparin, and 65 patients prophylactic low-dose nadroparin. There was no significant difference in clinical DCI occurrence between patients treated with high-dose (34%) and low-dose (31%) nadroparin. More patients were discharged to home in patients who received high-dose nadroparin (40%) compared to low-dose (17%; odds ratio [OR] 3.13, 95% confidence interval [95% CI]: 1.36-7.24). Furthermore, mortality was lower in the high-dose group (5%) compared to the low-dose group (23%; OR 0.19, 95% CI: 0.07-0.55), also after adjusting for neurological status on admission (OR 0.21, 95% CI: 0.07-0.63). CONCLUSION Patients who were treated with high-dose nadroparin after endovascular treatment for aneurysmal SAH were more often discharged to home and showed lower mortality. High-dose nadroparin did not, however, show a decrease in the occurrence of clinical DCI after aSAH. A randomized controlled trial seems warranted.

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