Nontraumatic Subarachnoid Hemorrhage Research Articles

Triglyceride-glucose index: a novel evaluation tool for all-cause mortality in critically ill hemorrhagic stroke patients-a retrospective analysis of the MIMIC-IV database

BackgroundHemorrhagic stroke (HS), including non-traumatic intracerebral hemorrhage (ICH) and subarachnoid hemorrhage (SAH), constitutes a substantial proportion of cerebrovascular incidents, accounting for around 30% of stroke cases. The triglyceride-glucose index (TyG-i) represents a precise insulin resistance (IR) indicator, a crucial metabolic disturbance. Existing literature has demonstrated an association between TyG-i and all-cause mortality (ACM) among individuals suffering from ischemic stroke (IS). Yet, the TyG-i prognostic implications for severe HS patients necessitating intensive care unit (ICU) admission are not clearly understood. Considering the notably elevated mortality and morbidity associated with HS relative to IS, investigating this association is warranted. Our primary aim was to investigate TyG-i and ACM association among critically ill HS patients within an ICU context.MethodsHerein, patients with severe HS were identified by accessing the Medical Information Mart for Intensive Care-IV (MIMIC-IV, version 2.2) database, using the International Classification of Diseases (ICD)-9/10 as diagnostic guidelines. Subsequently, we stratified the subjects into quartiles, relying on their TyG-i scores. Moreover, we measured mortality at ICU, in-hospital, 30 days, 90 days, and 1 year as the outcomes. Cox proportional hazards regression analysis and restricted cubic splines (RCS) were deployed for elucidating the relation between the TyG-i and ACM while utilizing the Kaplan-Meier (K-M) method to estimate survival curves. The findings’ robustness was assessed by conducting subgroup analysis and interaction tests employing likelihood ratio tests.ResultsThe analysis included 1475 patients, with a male predominance of 54.4%. Observed mortality rates in the ICU, hospital, 30 days, 90 days, and 1 year were 7.3%, 10.9%, 13.8%, 19.7%, and 27.3%, respectively. Multivariate Cox regression analysis results manifested that heightened TyG-i was significantly related to ACM at 30 days (adjusted hazard ratio [aHR]: 1.32; 95% confidence interval [CI]: 1.05–1.67; P = 0.020), 90 days (aHR: 1.27; 95% CI: 1.04–1.55; P = 0.019), and 1 year (aHR: 1.22; 95% CI: 1.03–1.44; P = 0.023). The results of RCS analysis demonstrated a progressive elevation in ACM risk with rising TyG-i levels. Interaction tests found no significant effect modification in this relationship.ConclusionIn summary, TyG-i exhibits a significant correlation with ACM among patients enduring critical illness due to HS. This correlation underscores the probable utility of TyG-i as a prognostic tool for stratifying HS patients according to their risk of mortality. Applying TyG-i in clinical settings could enhance therapeutic decision-making and the management of disease trajectories. Additionally, this investigation augments existing research on the linkage between the TyG-i and IS, elucidating the TyG-i’s role in predicting mortality across diverse stroke categories.

Capabilities of Dynamic Magnetic Resonance Angiography in Patients With Cerebral Aneurysms in the Postoperative Period

Introduction: The leading cause of hemorrhagic stroke is a ruptured cerebral aneurysm (CA), accounting for 70%-85% of nontraumatic subarachnoid hemorrhages. The primary goals of CA treatment are to prevent a rupture, thrombosis, or symptoms of mass effect. The main treatment options for intracranial aneurysms are open clipping, flow-diverter device implantation, resection and stenting of aneurysms. Treated aneurysms should be monitored to assess the stability of the occlusion because more than 20% of surgically treated aneurysms are known to recur. Magnetic resonance angiography (MRA) has recently become increasingly attractive for the follow-up of surgically treated CAs because it is noninvasive, does not require hospitalization, and reduces complications associated with the frequent use of cerebral angiography.Objective: To evaluate capabilities of dynamic MRA in postoperative monitoring of patients with CAs.Materials and methods: The study was conducted at the premises of the Scientific Research Institute – Ochapovsky Regional Clinical Hospital No. 1 (Krasnodar, Russian Federation). In a hospital setting, 38 patients with CAs were examined in the late postoperative period. All the patients underwent magnetic resonance imaging, 3-dimensional time-of-flight (3D-TOF) MRA, and dynamic MRA followed by cerebral angiography. Imaging findings (MRA, dynamic MRA, and cerebral angiography) were evaluated by radiologists, x-ray surgeons, and neurosurgeons. They assessed treated aneurysms according to the Raymond-Roy occlusion classification: complete obliteration (class 1), residual neck (class 2), and residual aneurysm (class 3). Untreated aneurysms in patients with multiple CAs and de novo aneurysms were also assessed, and we looked for other vascular malformations.Results: The study was conducted in the late postoperative period from 6 to 18 months. A total of 38 patients participated in the study; of them 27 were women (age, 32-77 years) and 11 were men (age, 32-65 years). Dynamic MRA detected neck remnants of 4 clipped aneurysms and 2 embolized ones, which was confirmed by cerebral angiography. According to the dynamic MRA results, in case of clipped aneurysms neck remnants were found in the anterior communicating artery (n = 2), internal carotid artery (n = 1), and anterior choroidal artery (n = 1). In case of embolized aneurysms, neck remnants were revealed in the internal carotid artery (n = 1) and basilar artery (n = 1). Dynamic MRA also detected 5 additional aneurysms: 2 internal carotid artery aneurysms, 1 basilar artery aneurysm, 1 anterior cerebral artery aneurysm, and 1 anterior communicating artery aneurysm. These findings coincided with those of cerebral angiography. Based on the results of our study, the sensitivity and specificity of dynamic MRA in detecting CA neck remnants and untreated aneurysms were 100%.Discussion: Dynamic MRA findings are fully consistent with those of cerebral angiography in terms of determining an aneurysm occlusion status during postoperative follow-up. As for evaluation of de novo intracranial aneurysms, dynamic MRA is also superior to noncontrast 3D-TOF MRA in assessment of aneurysm shape and neck detection. Therefore, dynamic MRA can clearly visualize the structure of cerebral vessels mainly due to the effect of blood flow and static tissue contrast, and the principle is mainly the effect of multiphase scanning and accumulation of contrast agent.Conclusions: Dynamic MRA has a number of advantages over cerebral angiography, such as noninvasiveness, high-resolution images of the cerebral arteries, absence of radiation exposure, use of iodinated contrast agent, and absence of artifacts from metal clips or embolic material.

The Impact of Fluid Balance on Acute Kidney Injury in Nontraumatic Subarachnoid Hemorrhage.

Background: Nontraumatic subarachnoid hemorrhage (SAH) can lead to poor neurologic outcomes, particularly when delayed cerebral ischemia (DCI) occurs. Maintenance of euvolemia following SAH is thought to reduce the risk of DCI. However, attempts at maintaining euvolemia often err on the side of hypervolemia. In this study, we assessed the relationship between fluid balance and acute kidney injury (AKI) in SAH patients, assessing hypervolemia versus euvolemia and their impact on AKI. Methods: In a quaternary care center, neuroscience intensive care unit we conducted a retrospective longitudinal analysis in adult patients who suffered a nontraumatic SAH. Results: Out of 139 patients, 15 (10.8%) patients developed an AKI while hospitalized, with 7 stage I, 3 stage II, and 5 stage III injuries. Acute kidney injury patients had higher peak sodium (150.1 mEq/L vs 142.7 mEq/L, 95% confidence interval [CI]: [2.7-12.1 mEq/L]), higher discharge chloride (109.1 mEq/L vs 104.9 mEq/L, 95% CI: [0.7-7.6 mEq/L]), and lower hemoglobin at discharge (9.3 g/dL vs 11.3 g/dL, 95% CI: [1.0-2.9 g/dL]). At 7 days, AKI patients had a fluid balance that was 1.82 L higher (P = .04), and 3.38 L higher at 14 days (P = .02), in comparison to day 3. Acute kidney injury was associated with significant mortality increases. This increase in mortality was found at 30 days from admission with a 9.52-fold increase, and at 60 days with a 6.25-fold increase. As a secondary outcome, vasospasm (19 patients, 13.7%) showed no association with AKI. Conclusions: Acute kidney injury following SAH is correlated with clinically significant hypervolemia, elevated sodium, elevated chloride, decreased urine output, and decreased hemoglobin at discharge-risk factors for all SAH patients. This study further elucidates the harm of hypervolemia and gives greater practical evidence to physicians attempting to balance the dangers of vasospasm and AKI.

The relationship between the level of vitamin D and ruptured intracranial aneurysms among patients with high sun exposure

Non-traumatic subarachnoid hemorrhage (SAH) accounts for 3–5% of acute strokes. Intracranial aneurysm is the most common cause of non-traumatic SAH. Vitamin D influences the cardiovascular system, including the formation and rupture of cerebral aneurysms. To evaluate the serum vitamin D level in patients living in the tropical zone who suffered aneurysmal subarachnoid hemorrhage and its correlation with demographic and neurological characteristics. This is an analytical cross-sectional study to assess the serum level of vitamin D in a study population of 99 patients treated and diagnosed with aSAH in a public hospital in Recife-PE over a period of 12 months. In the study sample, composed of individuals with high sun exposure due to the lifestyle they lead in a tropical region, we observed hypovitaminosis D (85.9%), with a median of 19.9 ng/ml, although the majority of individuals are skin with high concentration of melanin (Fitzpatrick skin type IV and V). In addition, rates of sun exposure are high to all patients (Solar Index 9.03 P50). Most individuals were female (79.8%); there was no statistical difference in solar exposure/solar index between genders. As for the neurological repercussions, there was no statistical relevance in the clinical prognostic scales evaluated. As the sample was composed mainly of individuals whose economic activity is agriculture, the values of solar index found are vastly higher than those of other studies conducted in high latitude regions. In line with the literature review, some aspects were raised with the objective of justifying such findings that go from the base of the poor diet of these individuals, the increase of melanin in the skin and genetic alterations that directs us to possible mechanisms of natural photoprotection to high sun exposure. Thus, we had a vast majority (85%) of hypovitaminosis D, which in fact makes us wonder if there is any influence of calcitriol on vitamin D receptors in vascular walls and in the cardiovascular system as a whole, which influence bleeding events of this nature. As for the neurological repercussions, measured using assessment scales (Glasgow coma scale, WFNS scale, Hunt–Hess and Fisher's tomographic scale) there was no significant difference in the results. As it is only a descriptive study, the causal relationship of the facts cannot be established. However, in a population exposed to high sun exposure and affected by aneurysmal SAH, there is a significant rate of hypovitaminosis D, which supports the hypothesis that vitamin D plays a role in vascular pathologies, such as cerebral aneurysms and SAH.

Delirium and Its Associations with Critical Care Utilizations and Outcomes at the Time of Hospital Discharge in Patients with Acute Brain Injury.

Background and Objectives: We analyzed delirium testing, delirium prevalence, critical care associations outcomes at the time of hospital discharge in patients with acute brain injury (ABI) due to acute ischemic stroke (AIS), non-traumatic subarachnoid hemorrhage (SAH), non-traumatic intraparenchymal hemorrhage (IPH), and traumatic brain injury (TBI) admitted to an intensive care unit. Materials and Methods: We examined the frequency of assessment for delirium using the Confusion Assessment Method for the intensive care unit. We assessed delirium testing frequency, associated factors, positive test outcomes, and their correlations with clinical care, including nonpharmacological interventions and pain, agitation, and distress management. Results: Amongst 11,322 patients with ABI, delirium was tested in 8220 (726%). Compared to patients 18-44 years of age, patients 65-79 years (aOR 0.79 [0.69, 0.90]), and those 80 years and older (aOR 0.58 [0.50, 0.68]) were less likely to undergo delirium testing. Compared to English-speaking patients, non-English-speaking patients (aOR 0.73 [0.64, 0.84]) were less likely to undergo delirium testing. Amongst 8220, 2217 (27.2%) tested positive for delirium. For every day in the ICU, the odds of testing positive for delirium increased by 1.11 [0.10, 0.12]. Delirium was highest in those 80 years and older (aOR 3.18 [2.59, 3.90]). Delirium was associated with critical care resource utilization and with significant odds of mortality (aOR 7.26 [6.07, 8.70] at the time of hospital discharge. Conclusions: In conclusion, we find that seven out of ten patients in the neurocritical care unit are tested for delirium, and approximately two out of every five patients test positive for delirium. We demonstrate disparities in delirium testing by age and preferred language, identified high-risk subgroups, and the association between delirium, critical care resource use, complications, discharge GCS, and disposition. Prioritizing equitable testing and diagnosis, especially for elderly and non-English-speaking patients, is crucial for delivering quality care to this vulnerable group.

Abstract WP274: Clinical Outcomes of Vasospasms in Non-Traumatic Subarachnoid Hemorrhage and Racial Disparity in the United States: A 20-year Analysis of the National Inpatient Sample From 2000-2019

Background: Cerebral vasospasm in non-traumatic subarachnoid hemorrhage (SAH) is associated with a high rate of morbidity and mortality. We aimed to analyze the clinical outcome of the cerebral vasospasms and characterize the racial disparities in patients with vasospasms over a 20 year period. Methods: A query of the 2000-2019 National Inpatient Sample was performed for patients admitted with cerebral vasospasm (ICD-9 435.9, ICD-10 I67.84) in non-traumatic SAH (ICD-9 430, ICD-10 I60). Demographics, comorbidities, and outcomes were identified. Functional outcome was categorized in Excellent, Good and Poor. Univariate analysis with t-tests or chi-square performed as appropriate, and significant variables were entered into a multivariate regression to generate adjusted odds ratios (AOR)/β-coefficients for race on outcomes. Significance set at an alpha level of <0.001. All analysis performed in R version 4.1.3. Results: Among a total of 67,670 SAH patients, 34,091 (50.3%) with vasospasms were identified. Mean Age was 53.4±13.5 years. Patients with vasospasms had higher Elixhauser Comorbidity Score (8.47 ± 7.86 vs. 7.70 ± 7.77; p<0.001). Patients with seizures were more likely to be White or Hispanic, and to have systemic inflammatory disease, hyperlipidemia and hypertension (all p<0.001). After propensity matching, vasospasm patients were less likely to experience in-hospital mortality (AOR 0.53; 95%CI: 0.47-0.59), likely to have longer hospital stay (3.55 days, 95%CI:3.03-4.07), and had increased hospital charges ($114,108; 95%CI: $102,527-125,688)(all p<0.001). The vasospasm patients were 62.2% White, 15.4% Black, 13.2% Hispanic, and 3.7% Asian. The Hispanic patients had more likelihood to have an excellent outcome (P=0.003). Conclusions: Approximately 50% of patients with non-traumatic SAH experienced vasospasms while hospitalized. Vasospasm is more likely to occur in hypertension and hyperlipidemia patients and is associated with longer hospital stay but less in-hospital mortality. The Hispanic race may have better odds of having an excellent outcome.

Abstract HUP7: Impact of Social Determinants of Health and Academic Hospital Care on Outcomes After Non-Traumatic Subarachnoid Hemorrhage

Background: Growing evidence shows that SDOH and care setting affect ischemic stroke recovery. Impact on non-traumatic SAH is unclear. We studied SDOH and academic hospital influence on SAH outcomes. Methods: We conducted a retrospective study using data from the GWTG Stroke. All analyses were conducted using the Precision Medicine Platform. Hospitals partaking in this study obtained either human research approval for enrolment without patient consent or an IRB exemption. The exposures of interest were the Social Deprivation Index (SDI), the Adjusted Gross Income (AGI), and academic hospital care status. SDI and AGI were divided into three groups each, and care setting was labeled as academic or non-academic. Measured outcomes were: in-hospital death, length of stay (LOS), and discharge disposition (DD). We used regression with interaction terms to assess SDOH and care setting impact. Results: The study included 146,310 SAH patients (mean age 60, female sex 61%). Higher SDI was associated with longer LOS (unadjusted median days 11.1, 12.1 and 12.8) and worse DD (unadjusted risk 42.4%, 44%, 44.7%) (p < 0.001). Lower AGI was associated with increased in-hospital mortality (15.9%, 15.5%, 15.1%) and worse DD (44.2%, 43.9%, 43.1%) (p < 0.001). Academic hospital care demonstrated lower LOS (7.7±10.9 vs. 13.2±14.8, p < 0.001), reduced in-hospital mortality (13.8% vs. 16%, p < 0.001), and better DD (63.3% vs. 53.2%, p < 0.001). Adjusted multivariate analysis confirmed these findings. In comparison to the first, for the third tertile of the SDI, the odds for having a good outcome discharge were 0.87 (95% CI 0.82-0.92, p < 0.001). Additionally, SDI third tertile was associated with a significant increase in LOS (Beta 2.05; p=0.001). Higher AGI was correlated with reduced mortality (OR 0.90; 95% CI 0.83-0.96, p=0.004). Academic care was linked to lower in-hospital mortality (OR 0.89; 95% CI 0.81-0.98, p=0.029) and improved DD (OR 1.09; 95% CI 1.01-1.17, p=0.002). Interaction analysis revealed that academic care and higher AGI lead to synergistic reductions in LOS and better discharge outcomes (p<0.05). Conclusion: This analysis of GWTG-Stroke highlights the significant independent and synergistic influence of SDOH and academic hospital care on outcomes following SAH

Abstract TP1: Changing Trends in the Epidemiology of Subarachnoid Hemorrhage: A Population-Based Study

Background: There are conflicting data on temporal trends in subarachnoid hemorrhage (SAH) incidence and outcomes. We examined trends from 1993-2020 in a long-running population-based stroke study conducted in the Greater Cincinnati Northern Kentucky (GCNK) region. Methods: Using a well-validated approach, we ascertained all incident nontraumatic SAHs among residents of the GCNK region in the following study periods; July 1993-June 94, calendar years 1999, 2005, 2010, 2015, and 2020. Potential cases were identified by ICD codes, abstracted, and then adjudicated by physicians. Aneurysmal SAH (aSAH) was defined as those with culprit aneurysms; cases with no available vessel imaging were considered aSAH if the hemorrhage volume was “massive” or if the patient died rapidly after onset. Incidence rates were compared over time using linear regression after normalizing to 2010 census demographics. The primary outcome assessed was unadjusted 30-day Case Fatality Rate (CFR), which was available through 2015. Results: We identified 518 SAH cases, of which 372 were aSAH (71.8%). Overall SAH incidence rate was stable over time, ranging from 8-10 cases per 100,000 person-years (Figure Panel A); however, the rate of aSAH showed a statistically significant decline, going from 7.2 cases/100,000 person-years in 1993 to 5.2 cases/100,000 person-years in 2020 (trend P =0.02). There was a nonsignificant increase in nonaneurysmal SAH ( P =0.09 for trend). Overall 30-day CFR declined significantly through 2015 ( P =0.006, Figure Panel B), driven predominantly by a decline in aSAH CFR (from 39.3% to 23.7%, trend P =0.04). Conclusion: We observed a significant decline in the incidence of aSAH from 1993-2020; however, overall SAH incidence was stable in the setting of numerically more nonaneurysmal SAHs. Further study is needed to understand the causes of this trend. 30-Day CFR has significantly improved both for overall SAH and for aSAH.

The Use of Neuromarker NSE, S100-B, GFAP Proteins in the Diagnosis and Treatment of Cerebral Ischemia in Patients with Aneurysmal Subarachnoid Hemorrhage

The incidence of non-traumatic subarachnoid hemorrhage due to rupture of cerebral aneurysms and subsequent disability motivates the search for predictors of severe course and unfavorable outcome of the disease for early intensive treatment. NSE, S100-B, GFAP markers have proven themselves well for assessing the dynamics of treatment for diseases of the nervous system and detecting neurological nosologies. The use of the above proteins in aneurysmal hemorrhage opens up new perspectives in assessing the clinical status of the patient in the early stages, developing further treatment strategies, as well as helps draw conclusions about the outcome of the disease and possible disability of the patient. The studies collected in the review motivate continued research of the neuromarkers in aneurysmal hemorrhage.

Relationship between baseline bicarbonate and 30-day mortality in patients with non-traumatic subarachnoid hemorrhage.

This study aimed to explore the relationship between baseline bicarbonate levels and 30-day mortality in individuals with non-traumatic subarachnoid hemorrhage (SAH). Patients with non-traumatic SAH were chosen from the Medical Information Mart for Intensive Care (MIMIC)-IV database. The relationship between baseline bicarbonate and 30-day mortality was examined using Cox regression models. Restricted cubic splines were used to test the hypothesis that there was an association between bicarbonate and mortality. With the use of Kaplan-Meier survival curve analysis, we looked deeper into the validity of these correlations. To find subgroups with differences, interaction tests were utilized. This retrospective cohort study consisted of 521 participants in total. Bicarbonate had a negative association with death at 30 days (HR = 0.93, 95%CI: 0.88-0.98, p = 0.004). Next, we divided bicarbonate into quartile groups. In comparison to the reference group Q1 (20 mEq/L), groups Q3 (23-25 mEq/L) and Q4 (26 mEq/L) had adjusted HR values of 0.47 (95%CI: 0.27-0.82, p = 0.007) and 0.56 (95%CI: 0.31-0.99, p = 0.047). No definite conclusions can be derived from this study, since there is no obvious curve link between baseline bicarbonate and 30-day mortality. Patients' 30-day mortality increased statistically significantly (p < 0.001, K-M analysis) in patients with low bicarbonate levels. The relationship between bicarbonate and 30-day mortality remained consistent in the stratified analysis, with no observed interactions. Finally, 30-day mortality was negatively associated with baseline bicarbonate levels. Patients with non-traumatic SAH are more at risk of mortality if their bicarbonate levels are low.

Circulating inflammatory biomarkers and risk of intracranial aneurysm: a Mendelian randomization study

BackgroundIntracranial aneurysm (IA) accounts for a substantial source of non-traumatic subarachnoid hemorrhage, with inflammation postulated as a potential factor in its pathogenesis. The present study aims at evaluating the association between circulating inflammatory cytokines and risk of IA under a bidirectional two-sample Mendelian randomization (MR) design.MethodsFor primary analysis, summary statistics of inflammatory regulators was obtained from a genome-wide association study (GWAS) comprising 8293 Finnish participants. Summary data of IA were extracted from a GWAS which comprised 7495 cases and 71,934 controls in European descent. For targeted analysis, summary statistics were extracted from two proteomic studies, which recruit 3301 and 5368 European participants, respectively. Summary data of IA were acquired from FinnGen study with 5342 cases and 342,673 controls. We employed inverse variance weighted (IVW) method as main approach, with sensitivity analyses using weighted median, MR-Egger, and MR-PRESSO methods. Reverse MR analyses were conducted to minimize bias from reverse causality.ResultsNo causation of cytokines with IA subtypes was identified in both primary and targeted analysis after Bonferroni correction. In primary analysis, vascular endothelial growth factor (VEGF) and fibroblast growth factor basic (bFGF) levels were suggestively associated with aneurysmal subarachnoid hemorrhage (aSAH) [VEGF → aSAH: OR = 1.15, 95%CI 1.04–1.26, P = 0.005; bFGF → aSAH: OR = 0.62, 95% CI 0.42–0.92, P = 0.02]. Statistical significance failed to replicate in targeted analysis. Instead, suggestive protective effects for aSAH were identified in FGF-9 (FGF-9 → aSAH: OR = 0.74, 95% CI 0.62–0.89, P = 0.001) and FGF-16 (FGF-16 → aSAH: OR = 0.84, 95% CI 0.72–0.97, P = 0.017). Furthermore, reverse analyses identified suggestive effect of unruptured IA on RANTES, MIF, GRO-alpha, FGF-16, and FGF-19. Result remained robust after applying sensitivity tests.ConclusionsNo causality of inflammatory biomarkers on the risk of IA subtypes was identified. Future large-scale studies are in need to evaluate the temporal dynamics of cytokines in conjunction with IA.

An Epidemiological Investigation on Patients with Non-traumatic Subarachnoid Hemorrhage from 2010 to 2020.

Subarachnoid hemorrhage (SAH) is still considered a life-threatening medical condition with a high mortality rate, particularly in developing countries. Thus, the present study aimed to investigate the angiographic findings of non-traumatic or spontaneous SAH. This retrospective cohort study included 642 health records of patients with non-traumatic SAH over a 10-year period, from 2010 to 2020. The required data, including demographic information, aneurysm type, size, location, disease severity classification, and secondary complications, were extracted. The study included 642 patients, with 262 (40.8%) being male. The mean age of the participants was 54.72±13.51 years. The most prevalent type of aneurysm was saccular (89.1%), while serpentine (0.2%) and dissecting saccular (0.2%) aneurysms had the least prevalence. The most frequently involved arteries were the anterior communicating artery (ACoA; 38%), internal carotid artery (ICA; 27.6%), and middle cerebral artery (MCA; 13.4%). There was a significant correlation between sex and aneurysms occurring at ACoA and ICA (p< 0.0001), and ACoA - A1 (p=0.02). Patient age and sex were also significantly correlated with one another (p<0.0001). There was no statistically significant correlation between sex, aneurysm size, Glasgow coma scale (GCS), and modified Rankin scale (MRS). Based on our findings, the presence of aneurysms at ACoA, ACoA - A1, and ICA should be thoroughly ruled out in patients with severe headaches of sudden onset, particularly male patients of younger ages.

Association between estimation of pulse wave velocity and all-cause mortality in critically ill patients with non-traumatic subarachnoid hemorrhage: an analysis based on the MIMIC-IV database.

Estimated pulse wave velocity (ePWV), which measures vascular aging, is an independent predictor of cardiovascular death. Nevertheless, the relationship between ePWV and all-cause mortality among patients suffering from non-traumatic subarachnoid hemorrhages (NSAH) remains obscure. Consequently, the objective of this study is to ascertain whether ePWV exerts influence on the prognosis of individuals afflicted with NSAH. Through the Medical Information Mart for Intensive Care IV (MIMIC-IV) database, 644 eligible participants were included. The Kaplan-Meier survival curve method was employed to assess the disparity in survival status between the low and high ePWV cohorts. The Cox proportional hazard model was employed to investigate the association between ePWV and inpatient mortality among critically ill patients diagnosed with NSAH. The Restricted Cubic Spline (RCS) model was employed to examine the dose-response correlation. Subsequently, multivariate Cox regression analysis was performed to identify independent prognostic factors. Lastly, the impact of ePWV on inpatient mortality across various subgroups was evaluated through stratified analysis. Participants were categorized into two groups, delineated by their ePWV levels: a low ePWV level group and a high ePWV level group. Survival analysis unveiled that individuals with high ePWV exhibited a diminished survival rate compared to their counterparts with low ePWV. Following adjustment, low ePWV was significantly linked with a reduced risk of inpatient mortality among patients with NSAH (HR = 0.54, 95% CI = 0.32-0.89, p = 0.016). Simultaneously, analysis employing the RCS model further substantiated a linear escalation in the risk of inpatient mortality with increasing ePWV values. Elevated ePWV levels have been identified as an independent risk factor for the rise in inpatient mortality among NSAH patients and as a significant predictor of the clinical outcome of NSAH.

Deciphering changes in the incidence of hemorrhagic stroke and cerebral venous sinus thrombosis during the coronavirus disease 2019 pandemic: A nationwide time-series correlation study.

Hemorrhagic stroke and cerebral venous sinus thrombosis (CVST) are associated with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and vaccination. We aimed to investigate changes in the incidence of hemorrhagic stroke and CVST in South Korea before and during the coronavirus disease 2019 pandemic and the factors associated with these changes. We conducted a nationwide time-series study using population-based databases between 2007 and 2022. The real-world and forecasted incidences of acute non-traumatic subarachnoid hemorrhage (SAH), intracerebral hemorrhage (ICH), and CVST during the pandemic period (2020-2022) were estimated and compared with the pre-pandemic period (2007-2019). The prevalence of conventional risk factors was measured using time-series data. Finally, a time-series correlation analysis was performed to examine the temporal association between conventional risk factors, SARS-CoV-2 infection, and SARS-CoV-2 vaccination. The incidence of hemorrhagic stroke (SAH and ICH) was lower during the pandemic than during the pre-pandemic period. This observed decrease was associated with a reduction in the prevalence of conventional risk factors but not with SARS-CoV-2 infection or vaccination. The incidence of CVST was higher during the pandemic than during the pre-pandemic period, which may be temporally related to SARS-CoV-2 vaccination (Pearson correlation coefficient [r] = 0.349, P = 0.031). We report reassuring evidence of hemorrhagic stroke associated with SARS-CoV-2 infection and vaccination. However, awareness of CVST may be required for future vaccine rollouts and SARS-CoV-2 outbreaks.

Machine learning predictors of risk of death within 7 days in patients with non-traumatic subarachnoid hemorrhage in the intensive care unit: A multicenter retrospective study

Non-traumatic subarachnoid hemorrhage (SAH) is a critical neurosurgical emergency with a high mortality rate, imposing a significant burden on both society and families. Accurate prediction of the risk of death within 7 days in SAH patients can provide valuable information for clinicians, enabling them to make better-informed medical decisions. In this study, we developed six machine learning models using the MIMIC III database and data collected at our institution. These models include Logistic Regression (LR), AdaBoosting (AB), Multilayer Perceptron (MLP), Bagging (BAG), Gradient Boosting Machines (GBM), and Extreme Gradient Boosting (XGB). The primary objective was to identify predictors of death within 7 days in SAH patients admitted to intensive care units. We employed univariate and multivariate logistic regression as well as Pearson correlation analysis to screen the clinical variables of the patients. The initially screened variables were then incorporated into the machine learning models, and the performance of these models was evaluated. Furthermore, we compared the performance differences among the six models and found that the MLP model exhibited the highest performance with an AUC of 0.913. In this study, we conducted risk factor analysis using Shapley values to identify the factors associated with death within 7 days in patients with SAH. The risk factors we identified include Gcsmotor, bicarbonate, wbc, spo2, heartrate, age, nely, glucose, aniongap, GCS, rbc, sysbp, sodium, and gcseys. To provide clinicians with a useful tool for assessing the risk of death within 7 days in SAH patients, we developed a web calculator based on the MLP machine learning model.

STUDY OF “MAGNETIC RESONANCE IMAGING IN STROKE PATIENTS AT A TERTIARY HEALTH CARE CENTER”

Background: One of the main causes of mortality and disability worldwide is stroke. Cerebral infarction, non-traumatic subarachnoid hemorrhage, primary intracranial hemorrhage, and various dural sinus/cerebral vein obstruction are the different types of stroke. About 80–90% of strokes are ischemic strokes, which are the most frequent form of stroke. Aim of the Study: The aim of this study was to study “Magnetic resonance imaging in stroke patients at a tertiary health care center.” Methods: This was 18-month cross-sectional research conducted in the Department of Radiodiagnosis at the Shrisatyasai Medical College and Research Institute in Chengalpattu, Tamil Nadu, from December 2020 to June 2021. Results: In the present study, middle cerebral artery is 43.3%, posterior cerebral artery (PCA) is 16.7%, anterior cerebral artery is 13.3%, lacunar infarcts is 16.7%, multiple infarcts is 8.3%, and basilar excluding PCA is 1.7% in the present study. About 73.3% of the patients (44/60) had infarcts, 10% had hemorrhage (6/60), and 16.7% had stroke mimics (10/60). Conclusion: DWI is a better imaging method than conventional MRI in detecting early ischemic lesions in stroke patients with Sensitivity of 94% and specificity of 100% was observed among acute infarct patients.

Current Smoking Status Is Not a Risk Factor for Perioperative Outcomes in Patients with Aneurysmal Subarachnoid Hemorrhage Who Underwent Craniotomy Repair

BackgroundAneurysmal subarachnoid hemorrhage is a rupture leading to blood accumulating in the subarachnoid region. Smoking status often is a risk factor for postoperative complications for vascular procedures. This study aims to retrospectively examine the effect of being a current tobacco smoker on postoperative outcomes in nontraumatic subarachnoid hemorrhage patients. MethodsPatients with aneurysmal subarachnoid hemorrhage who underwent craniotomy were identified in the ACS-NSQIP database. The 30-day perioperative outcomes of current smokers were compared to that of control, which was patients who have not smoked tobacco in the past year. Postoperative outcomes included death, cardiac complications, stroke, operation time greater than four hours, bleeding, and other events. Additionally, this studied examined the same surgical outcomes in patients over age 65. ResultsWe found no significant difference between these two groups across all adverse outcomes analyzed. In age>65, we again found no significant different between these two groups across all adverse outcomes analyzed. ConclusionsThis study shows that although current tobacco smoker status is commonly a risk factor for vascular diseases and postoperative complications, it is not a risk factor for the postoperative variables we analyzed during craniotomy for aneurysmal subarachnoid hemorrhage. Additional research should be conducted to determine if different procedures to treat aneurysmal subarachnoid hemorrhage may have different outcomes among smokers.

Development of a predictive nomogram for 28-day mortality risk in non-traumatic or post-traumatic subarachnoid hemorrhage patients.

Subarachnoid hemorrhage (SAH) is associated with high rates of mortality and permanent disability. At present, there are few definite clinical tools to predict prognosis in SAH patients. The current study aims to develop and assess a predictive nomogram model for estimating the 28-day mortality risk in both non-traumatic or post-traumatic SAH patients. The MIMIC-III database was searched to select patients with SAH based on ICD-9 codes. Patients were separated into non-traumatic and post-traumatic SAH groups. Using LASSO regression analysis, we identified independent risk factors associated with 28-day mortality and incorporated them into nomogram models. The performance of each nomogram was assessed by calculating various metrics, including the area under the curve (AUC), net reclassification improvement (NRI), integrated discrimination improvement (IDI), and decision curve analysis (DCA). The study included 999 patients with SAH, with 631 in the non-traumatic group and 368 in the post-traumatic group. Logistic regression analysis revealed critical independent risk factors for 28-day mortality in non-traumatic SAH patients, including gender, age, glucose, platelet, sodium, BUN, WBC, PTT, urine output, SpO2, and heart rate and age, glucose, PTT, urine output, and body temperature for post-traumatic SAH patients. The prognostic nomograms outperformed the commonly used SAPSII and APSIII systems, as evidenced by superior AUC, NRI, IDI, and DCA results. The study identified independent risk factors associated with the 28-day mortality risk and developed predictive nomogram models for both non-traumatic and post-traumatic SAH patients. The nomogram holds promise in guiding prognosis improvement strategies for patients with SAH.

Myocardial dysfunction assessed by speckle-tracking in good-grade subarachnoid hemorrhage patients (WFNS 1–2): a prospective observational study

BackgroundCardiac complications due to non-traumatic subarachnoid hemorrhage (SAH) are usually described using classical echocardiographic evaluation. Strain imaging appears to have better sensitivity than standard echocardiographic markers for the diagnosis of left ventricular dysfunction. The aim of this study was to determine the prevalence of cardiac dysfunction defined as a Global Longitudinal Strain (GLS) ≥ − 20% in patients with good-grade SAH (WFNS 1 or 2).MethodsSeventy-six patients with good-grade SAH were prospectively enrolled and analyzed at admission for neurocritical care. Transthoracic echocardiography was performed on days 1, 3, and 7 after hemorrhage. Routine measurements, including left ventricular ejection fraction (LVEF), were performed, and off-line analysis was performed by a blinded examiner, to determine 2-, 3-, and 4-cavity longitudinal strain and left ventricular GLS. GLS was considered altered if it was ≥ − 20%, we also interested the value of ≥ − 17%. LVEF was considered altered if it was < 50%.ResultsOn day 1, 60.6% of patients had GLS ≥ − 20% and 21.2% of patient had GLS ≥ − 17%. In comparison, alteration of LVEF was present in only 1.7% of patients. The concordance rate between LVEF < 50% and GLS ≥ − 20% and LVEF ≥ 50% and GLS < − 20% was 46%.ConclusionStrain imaging showed a higher prevalence (60.6%) of left ventricular dysfunction during the acute phase of good-grade SAH (WFNS 1 or 2) than previously described.

Association between transcutaneous oxygen saturation within 24 h of admission and mortality in critically ill patients with non-traumatic subarachnoid hemorrhage: a retrospective analysis of the MIMIC-IV database.

In critically ill patients, transcutaneous oxygen saturation (SpO2) upon admission is typically associated with in-hospital mortality. Nevertheless, the available information for patients with non-traumatic subarachnoid hemorrhage (SAH) is limited. In our study, our objective was to assess the correlation between SpO2 levels and mortality among patients diagnosed with severe SAH. In this study, we extracted data from the Medical Information Marketplace in Intensive Care (MIMIC-IV) database, which comprises information on critically ill patients. By employing matching ICD-9 and ICD-10 codes, we identified 3,328 patients diagnosed with SAH. Every individual who was admitted to the intensive care unit (ICU) had their SpO2 data and various covariates, including age, sex, diagnosis, and duration of stay, recorded upon admission. Subsequently, the patients were categorized into three distinct groups according to their SpO2 levels: low (≤95%), moderate (95-98%), and high (≥98%). To investigate the association between percutaneous oxygen saturation and mortality in patients with severe SAH, logistic regression, and cubic spline models were utilized. The main outcomes of interest were 28- and 90-day mortality rates. Additionally, subgroup analyses were conducted to evaluate these correlations and assess the consistency of interactions. A cohort of 864 patients diagnosed with non-traumatic SAH was included in this study. The correlation between SpO2 and mortality displayed a U-shaped curve when utilizing a finite cubic spline function (non-linearity < 0.001), with the nadir in the probability of in-hospital death at 96%. Mortality at 28 and 90 days showed an inverse correlation with SpO2 < 96% (adjusted odds ratio [OR], 0.8; 95% confidence interval [CI], 0.67-0.95, and 0.76; 95% CI, 0.6-0.96). Conversely, there was a positive correlation between percutaneous oxygen saturation (SpO2) levels of ≥96% and mortality rates at both 28 and 90 days (adjusted OR, 1.17; 95% CI, 1.02-1.35 and 1.2; 95% CI, 1.05-1.39). In patients with severe subarachnoid hemorrhage, the association between SpO2 and mortality at 28 and 90 days demonstrated a U-shaped pattern. When SpO2 levels were between 95 and 98%, both short- and long-term mortality rates were at their lowest. Patients with significant subarachnoid hemorrhage had a lower chance of survival when their SpO2 values were either high or low.