Mediation effects of mean Hounsfield unit on relationship between hemoglobin and expansion of intracerebral hemorrhage

AbstractLow hemoglobin levels are known to be associated with hematoma expansion (HE) and poor functional outcome in patients with intracerebral hemorrhage (ICH). However, it is not yet known whether low hemoglobin itself causes HE directly or is merely a confounder. Thus, we investigated the mediation effect of the mean Hounsfield unit (HU) of hematoma on the relationship between low hemoglobin and expansion of ICH. Overall, 232 consecutive patients with ICH who underwent non-contrast computed tomography (NCCT) within 12 h since onset were included. The mean HU and hematoma volume on NCCT were investigated using semi-automated planimetry. HE was defined as an increase in hematoma volume > 33% or 6 mL. The respective associations among the hemoglobin level, mean HU, and HE were analyzed using multivariable regression analysis, adjusting for age, sex, and known HE predictors. Mediation analysis was performed to examine the potential causal association among the three. HE occurred in 34.5% of patients; hemoglobin levels were inversely associated with HE occurrence (adjusted odds ratio, 0.90; p = 0.03). The mean HU of the hematoma was lower in patients with HE than in patients without HE (58.5 ± 3.3 vs. 56.8 ± 3.0; p < 0.01). Hemoglobin levels on admission were linearly related to the mean HU (adjusted β, 0.33; p < 0.01) after adjusting for known HE predictors (time from onset to CT, antithrombotic use, hematoma volume). Causal mediation analysis showed a significant mediation effect of the mean HU on the association between hemoglobin levels and HE (p = 0.04). The proportion of indirect effect through the mean HU among the total effect was 19% (p = 0.05). The mediation effect became nonsignificant in the when the multivariable model was adjusted with additional covariates (baseline systolic blood pressure and hematoma location). The mean HU of the hematoma mediated the association between hemoglobin levels and HE occurrence. Therefore, the mean HU of the hematoma may be a potential marker of impaired hemostasis in patients with ICH.

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Abstract TP451: Intracerebral Hemorrhage Volume Predicts Neurological Pupil Index

Stroke ◽

10.1161/str.51.suppl_1.tp451 ◽

2020 ◽

Vol 51 (Suppl_1) ◽

Author(s):

Venkatesh Aiyagari ◽

Khadijah Mazhar ◽

Daiwai Olson ◽

Sonja Stutzman ◽

James Moreno ◽

...

Keyword(s):

Intracerebral Hemorrhage ◽

Neurocritical Care ◽

Mass Effect ◽

Hematoma Expansion ◽

Midline Shift ◽

Hematoma Volume ◽

Hemorrhage Volume ◽

The Mean ◽

Neurological Pupil Index

Introduction: Hand-held automated pupillometry reliably evaluates the pupillary light reflex (PLR) at the bedside and there is growing interest in studying its ability to detect midline shift and mass effect. We hypothesized that intracerebral hemorrhage (ICH) volume would correlate with objective measures of PLR, specifically the Neurological Pupil index (NPi). Methods: This was a retrospective study of ICH patients with serial pupillometer readings admitted to the Neurocritical Care Unit and enrolled in the END-PANIC registry. CT images were examined to measure hematoma volume using the simplified ABC/2 method, midline shift, hydrocephalus score, and Graeb score to measure interventricular hemorrhage. Demographics were examined with standard measures of central tendency, hypotheses with logistic regression, categorical data with Fisher’s Exact X 2 , and multivariate modeling with constructed MAX-R models. Results: Of 44 subjects, 50% were male and the mean age was 65.4 years. ICH location was deep in 56.8% and lobar in 43.2%. There was a significant correlation between ICH volume and NPi of the pupil ipsilateral (r 2 =0.48, p<0.0001) and contralateral (r 2 =0.39, p<0.0001) to the hematoma. Shift of the septum pellucidum also correlated with NPi (ipsilateral[r 2 =0.25, p=0.0006], contralateral[r 2 =0.15, p=0.0106]), as did shift of the pineal gland (ipsilateral[r 2 =0.21, p=0.0017], contralateral[r 2 =0.11, p=0.0328]). No statistically significant correlation was found between hydrocephalus score or Graeb score and NPi. ICH volume was the most predictive of abnormal NPi (Figure 1). Conclusions: The NPi correlates with ICH volume and shift of midline structures. Abnormalities in NPi can be predicted by hematoma volume. Future studies should explore the role of NPi in detecting hematoma expansion and worsening midline shift.

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Abstract WP418: Characteristic of Intracerebral Hemorrhage Related to Direct Oral Anticoagulant versus Warfarin: Results From the PASTA Registry

Stroke ◽

10.1161/str.51.suppl_1.wp418 ◽

2020 ◽

Vol 51 (Suppl_1) ◽

Author(s):

Satoshi Suda ◽

Yasuyuki Iguchi ◽

Shigeru Fujimoto ◽

Yoshiki Yagita ◽

Takayuki Mizunari ◽

...

Keyword(s):

Intracerebral Hemorrhage ◽

Oral Anticoagulant ◽

Hematoma Expansion ◽

Direct Oral Anticoagulant ◽

Registry Study ◽

Stroke Patients ◽

Hematoma Volume ◽

Imaging Characteristics ◽

Warfarin Treatment ◽

Patient Enrollment

Background and Purpose: The characteristics of direct oral anticoagulant (DOAC)-related intracerebral hemorrhage (ICH) have not been fully clarified. We planned to recruit patients prospectively and to investigate the characteristics and outcomes in patients with ICH receiving direct oral anticoagulant (DOAC) and warfarin treatment. Methods: The prospective analysis of stroke patients taking anticoagulants (PASTA) registry study is an observational, multicenter, prospective registry of stroke patients receiving OAC. Patient enrollment started in April 2016 at 25 tertiary centers across Japan. We compared imaging, clinical characteristics, and discharge modified Rankin Scale (mRS) between DOAC- and warfarin-related ICH patients with atrial fibrillation (AF). Results: A total of 154 patients (51 women; median age 77 [quartiles 69-87] years) were analyzed. Of these, 111 patients (72%) received prior DOAC treatment and the remaining 43 (28%) received prior warfarin treatment (Fig. A, B and C). There were no relevant differences in clinical and hematoma characteristics between DOAC- and warfarin-related ICH regarding baseline hematoma volume (median [quartiles]: DOAC, 11 [5-23] mL vs. warfarin, 12 [5-30] mL; P =0.95), rate of hematoma expansion (DOAC, 12/111 [11%] vs. warfarin, 4/43 [9%]; P =0.80), rate of subcortical hemorrhage (DOAC, 15/111 [11%] vs. warfarin, 10/43 [9%]; P =0.80) and the proportion of patients with unfavorable outcome (mRS, 4-6: DOAC 76/108 [70%] vs. warfarin 23/38 [61%]; P =0.26). Cerebral microbleeds (CMBs) were detected more frequently in DOAC group than in warfarin (47/76 [62%] vs. 11/32 [34%]; P <0.01). Subgroup analyses showed that type of DOAC agent did not result in relevant differences in imaging characteristics or outcome (Fig. D and E). Conclusions: Our results showed that there were no significant differences in hematoma characteristics and functional outcome among AF patients with DOAC- or warfarin-related ICH.

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Abstract 3543: Imaging Correlates of Early Neurologic Deterioration among Patients with Intracerebral Hemorrhage

Stroke ◽

10.1161/str.43.suppl_1.a3543 ◽

2012 ◽

Vol 43 (suppl_1) ◽

Author(s):

Nerses Sanossian ◽

Adrian M Burgos ◽

David S Liebeskind ◽

Sidney Starkman ◽

Pablo Villablanca ◽

...

Keyword(s):

Intracerebral Hemorrhage ◽

Hematoma Expansion ◽

Hematoma Volume ◽

Phase 3 ◽

Neurologic Deterioration ◽

Irregular Border ◽

History Of ◽

Initial Imaging ◽

Fazekas Scale ◽

Frequent Presence

Background: Early neurologic deterioration (END) occurs commonly in intracerebral hemorrhage (ICH) patients being transported by EMS ambulances, but the imaging correlates of END have not been previously delineated. Methods: We analyzed consecutive ICH patients in the Field Administration of Stroke Therapy - Magnesium (FAST-MAG) Trial, a phase 3, multicenter of paramedic-initiated magnesium sulfate vs. placebo for stroke patients presenting within 2 hours of symptom onset. END was defined as a 2-point or greater decrease in the Glasgow Coma Scale (GCS) from paramedic evaluation to ED evaluation. Baseline imaging studies were independently analyzed by 2 neurologists for ICH location, volume, presence of intraventricular hemorrhage (IVH), heterogeneity (defined as >20 point difference in Hounsfield units), irregular hematoma borders, multilobulated appearance, and substantial edema (defined as >0.5cm thickness). Leukoaraiosis was graded using the Fazekas scale for periventricular and deep white matter changes (0-3 for each). Results: Among 127 patients, mean age was 66 (SD 14) years, 34% were women, 35% were Hispanic ethnicity, 83% white, and 84% had a history of HTN. Patients were evaluated by paramedics a median of 23 (IQR 16, 39) minutes after last known well time (LKWT). At that time, the median GCS was 15 (IQR 15-15) and mean SBP/DBP was 177/95 (SD 34/22). Initial post-arrival brain imaging was performed a median of 94 (IQR 77, 117) min after LKWT. Post-arrival study GCS scores were obtained at a median of 108 (IQR 70, 144) min after LWKT. Early neurologic deterioration occurred in 37 (29%) patients. Among these patients, median first ED GCS was 3 (IQR 3-10). On first imaging, compared with neurologically stable patients, END patients had larger hematoma volume (33 cc v 16 cc, p<0.0001), and more frequent presence of intraventricular extension (45% v 20%, p=0.003), midline shift (58% v 22%), substantial edema (54% v 26%, p=0.038), heterogeneous density (50% v 22%, p=0.006), multilobulated appearance (44% v 18%, p=0.002), and irregular border (39% v 14%, p=0.010). Leukoaraiosis and cortical v subcortical location did not affect rates of END. In multivariate analysis, hematoma volume and presence of IVH were imaging findings independently associated with early neurologic deterioration. Conclusions: About 3 in 10 patients with hyperacute ICH neurologically deteriorate during the prehospital and early emergency department course, often before neuroimaging is obtained. Patients with early neurologic deterioration have larger hematoma volume and occurrence of IVH on initial imaging. These findings suggest hematoma expansion prior to ED arrival drives early neurologic deterioration in ICH and emphasize the need for prehospital interventions.

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Mediation effects of mean hounsfield unit on relationship between hemoglobin and expansion of intracerebral hemorrhage

Journal of the Neurological Sciences ◽

10.1016/j.jns.2021.119679 ◽

2021 ◽

Vol 429 ◽

pp. 119679

Author(s):

Yong Soo Kim ◽

Han-Gil Jeong ◽

Hee-Yun Chae ◽

Moon-Ku Han

Keyword(s):

Intracerebral Hemorrhage ◽

Hounsfield Unit ◽

Mediation Effects

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Abstract TP358: Prehospital Diagnosis of Intracerebral Hemorrhage in a Mobile Stroke Treatment Unit

Stroke ◽

10.1161/str.47.suppl_1.tp358 ◽

2016 ◽

Vol 47 (suppl_1) ◽

Author(s):

Daniel Vela-Duarte ◽

Ramnath Santosh Ramanathan ◽

Atif Zafar ◽

Ather Taqui ◽

Stacey Winners ◽

...

Keyword(s):

Intracerebral Hemorrhage ◽

Hematoma Expansion ◽

Hospital Treatment ◽

Treatment Team ◽

Hematoma Volume ◽

Treatment Unit ◽

Stroke Treatment ◽

Imaging Characteristics ◽

Mobile Stroke Unit ◽

The Impact

Introduction: The mobile stroke unit (MSTU) is an on-site pre-hospital treatment team that incorporates laboratory and CT scanner and reduces times to treatment for ischemic stroke thrombolysis. The impact of MSTU on treatment and outcomes of intracerebral hemorrhage (ICH) remains unknown. We report our initial experience with ICH encountered on MSTU. Hypothesis: ICH can be quickly identified using MSTU. Hypertension and coagulopathy are common in ICH evaluated on MSTU. Methods: We identified ICH cases from the prospectively collected database encounters. Demographics, clinical features, MSTU imaging and repeat imaging characteristics were reviewed. Initial and follow-up hematoma volume was calculated by the ABC/2 method. Results: Of 295 encounters on MSTU from July 2014 to July 2015, 20 (6.7%) had intracranial hemorrhage, which comprised of 17 intracerebral, 1 subarachnoid and 2 subdural hemorrhages. Median time to CT diagnosis of ICH from emergency medical dispatch was 31 minutes (interquartile range (IQR) 28-36) and that from last known well was 118 minutes (IQR 39-301). Of the 17 ICH patients, 15 (88%) were hypertensive, with a mean systolic blood pressure of 178.1 and diastolic 91.0 mm Hg. Five (29.4%) individuals were found with INR>1.4, 1 of whom received 4-factor prothrombin complex concentrate. Median NIH Stroke Scale was 11 (IQR 7.5-14.5), and median hematoma volume was 10.7 cc (IQR 4.3-30.8). One patient had significant hematoma expansion as defined by >6 cc or 33% relative volume increase. Conclusions: Over 5% of the cases evaluated in the unit presented with ICH, most of whom were hypertensive and had small hematoma volume. MSTU enables early diagnosis of ICH after activation of emergency system, can provide early treatment, and appropriate triage.

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Abstract TP308: Reduced Estimated Glomerular Filtration Rate And Outcomes Of Intracerebral Hemorrhage: The SAMURAI-ICH Study

Stroke ◽

10.1161/str.44.suppl_1.atp308 ◽

2013 ◽

Vol 44 (suppl_1) ◽

Author(s):

TETSUYA MIYAGI ◽

Masatoshi Koga ◽

Hiroshi Yamagami ◽

Satoshi Okuda ◽

Yasushi Okada ◽

...

Keyword(s):

Glomerular Filtration Rate ◽

Intracerebral Hemorrhage ◽

Glomerular Filtration ◽

Filtration Rate ◽

Hematoma Expansion ◽

Hematoma Volume ◽

Nihss Score ◽

Group 3 ◽

Group 2 ◽

Group 1

Background and Purpose: The association between chronic kidney disease and clinical outcomes in acute intracerebral hemorrhage (ICH) remains uncertain. We aimed to assess associations of renal dysfunction and outcomes in acute ICH patients treated with intensive BP lowering. Methods: The SAMURAI-ICH study was a prospective, multicenter, observational study. A total of 211 patients with acute supratentorial ICH were recruited. BP was targeted between 120 mmHg and 160 mmHg during initial 24 h using intravenous nicardipine. Glomerular filtration rate (eGFR) was calculated using admission serum creatinine. After 23 patients on maintenance hemodialysis were excluded, the remaining 188 were divided into 3 groups as follows: Group 1, eGFR of <60; Group 2, 60 to 75; and Group 3, ≥75 mL/min/1.73m 2 . Clinical outcomes were hematoma expansion of ≥33% at 24 h, neurological deterioration within 72 h (GCS decrement ≥2 points or NIHSS increment ≥4 points), and favorable (modified Rankin Scale [mRS] ≤2) and unfavorable (mRS ≥5) outcomes at 3 months. Results: Of 188 patients, 35 (18 women) were allocated to Group 1, 58 (20) to Group 2, and 95 (33) to Group 3. Significant differences among 3 groups were found in age (73.1±13.6, 63.3±13.2, 63.8±9.8 yo; p <0.001) and initial systolic BP (208.9±18.1, 201.2±15.6, 200.2±14.8 mmHg; p=0.018). Initial hematoma volume (14.9±11.9, 15.5±14.9, 14.3±12.3 mL) and initial median NIHSS score (14, 11, 13) were similar among 3 groups. For outcomes, significant differences among 3 groups were found in favorable outcome (17.7%, 51.7%, 41.3%; p=0.004) and unfavorable outcome (22.9%, 10.3%, 5.3%; p=0.021), but not in hematoma expansion (17.1%, 10.3%, 22.1%) and neurological deterioration (11.4%, 8.6%, 7.4%). After adjustment with initial hematoma volume, initial systolic BP and initial NIHSS score, eGFR <60 ml/min/1.73m 2 was inversely associated with favorable outcome (OR 0.20, 95% CI 0.07-0.54) and positively associated with unfavorable outcome (4.27, 1.36-13.53). Conclusions: Although decreased eGFR on admission was not associated with initial hematoma volume or initial NIHSS score, it was associated with poor outcomes at 3 months of ICH onset.

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N-Terminal Pro-Brain Natriuretic Peptide Concentrations After Hypertensive Intracerebral Hemorrhage: Relationship With Hematoma Size, Hyponatremia, and Intracranial Pressure

Journal of Intensive Care Medicine ◽

10.1177/0885066616683677 ◽

2017 ◽

Vol 33 (12) ◽

pp. 663-670 ◽

Cited By ~ 3

Author(s):

Fei Li ◽

Qian-Xue Chen ◽

Shou-Gui Xiang ◽

Shi-Zhun Yuan ◽

Xi-Zhen Xu

Keyword(s):

Intracranial Pressure ◽

Intracerebral Hemorrhage ◽

Brain Natriuretic Peptide ◽

Natriuretic Peptide ◽

Linear Regression Analysis ◽

Peak Level ◽

Hematoma Volume ◽

The Mean ◽

Hypertensive Intracerebral Hemorrhage ◽

Mean Concentration

Introduction: The role of N-terminal pro-brain natriuretic peptide (NT-proBNP) in patients with hypertensive intracerebral hemorrhage (HICH) is poorly understood. This study aimed to investigate the secretion pattern of NT-proBNP in patients with HICH and to assess its relationship with hematoma size, hyponatremia, and intracranial pressure (ICP). Methods: This prospective study enrolled 147 isolated patients with HICH. Blood samples were obtained from each patient, and values of serum NT-proBNP, hematoma size, blood sodium, and ICP were collected for each patient. Results: The peak-to-mean concentration of NT-proBNP was 666.8 ± 355.1 pg/mL observed on day 4. The NT-proBNP levels in patients with hematoma volume >30 mL were significantly higher than those in patients with hematoma volume <30 mL ( P < .05). In patients with severe HICH, the mean concentration of NT-proBNP was statistically higher than that in patients with mild–moderate HICH ( P < .05), and the mean level of NT-proBNP in hyponatremia group was significantly higher than that in normonatremic group ( P < .05). In addition, the linear regression analysis indicated that serum NT-proBNP concentrations were positively correlated with ICP ( r = .703, P < .05) but negatively with blood sodium levels only in patients with severe HICH ( r = −.704, P < .05). The serum NT-proBNP levels on day 4 after admission were positively correlated with hematoma size ( r = .702, P < .05). Conclusion: The NT-proBNP concentrations were elevated progressively and markedly at least in the first 4 days after HICH and reached a peak level on the fourth day. The NT-proBNP levels on day 4 were positively correlated with hematoma size. There was a notable positive correlation between plasma NT-proBNP levels and ICP in patients with severe HICH. Furthermore, only in patients with severe HICH, the plasma NT-proBNP levels presented a significant correlation with hyponatremia, which did not occur in patients with mild–moderate HICH.

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The Effect of Age on Characteristics and Mortality of Intracerebral Hemorrhage in the Oldest-Old

Cerebrovascular Diseases ◽

10.1159/000448813 ◽

2016 ◽

Vol 42 (5-6) ◽

pp. 485-492 ◽

Cited By ~ 8

Author(s):

Paola Forti ◽

Fabiola Maioli ◽

Michele Domenico Spampinato ◽

Carlotta Barbara ◽

Valeria Nativio ◽

...

Keyword(s):

Elderly Patients ◽

Intracerebral Hemorrhage ◽

Ct Scan ◽

Symptom Onset ◽

Oldest Old ◽

Hematoma Expansion ◽

Elderly Subjects ◽

Supporting Evidence ◽

Hematoma Volume ◽

Young Old

Background: Incidence of acute intracerebral hemorrhage (ICH) increases with age, but there is a lack of information about ICH characteristics in the oldest-old (age ≥85 years). In particular, there is a need for information about hematoma volume, which is included in most clinical scales for prediction of mortality in ICH patients. Many of these scales also assume that, independent of ICH characteristics, the oldest-old have a higher mortality than younger elderly patients (age 65-74 years). However, supporting evidence from cohort studies is limited. We investigated ICH characteristics of oldest-old subjects compared to young (<65 years), young-old (65-74 years) and old-old (75-84 years) subjects. We also investigated whether age is an independent mortality predictor in elderly (age ≥65 years) subjects with acute ICH. Methods: We retrospectively collected clinical and neuroimaging data of 383 subjects (age 34-104 years) with acute supratentorial primary ICH who were admitted to an Italian Stroke Unit (SU) between October 2007 and December 2014. Measured ICH characteristics included hematoma location, volume and intraventricular extension of hemorrhage on admission CT scan; admission Glasgow Coma Scale ≤8 and hematoma expansion (HE) measured on follow-up CT-scans obtained after 24 h. General linear models and logistic models were used to investigate the association of age with ICH characteristics. These models were adjusted for pre-admission characteristics, hematoma location and time from symptom onset to admission CT scan. Limited to elderly subjects, Cox models were used to investigate the association of age with in-SU and 1-year mortality: the model for in-SU mortality adjusted for pre-admission and ICH admission characteristics and the model for 1-year mortality additionally adjusted for functional status and disposition at SU discharge. Results: Independent of pre-admission characteristics, hematoma location and time from symptom onset to admission CT-scan, oldest-old subjects had the highest admission hematoma volume (p < 0.01). Age was unrelated to all other ICH characteristics including HE. In elderly patients, multivariable adjusted risk of in-SU and 1-year mortality did not vary across age categories. Conclusions: Oldest-old subjects with acute supratentorial ICH have higher admission hematoma volume than young and young-old subjects but do not differ for other ICH characteristics. When taking into account confounding from ICH characteristics, risk of in-SU and 1-year mortality in elderly subjects with acute supratentorial ICH does not differ across age categories. Our findings question use of age as an independent criterion for stratification of mortality risk in elderly subjects with acute ICH.

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Hematoma Expansion and Clinical Outcomes in Patients With Factor-Xa Inhibitor–Related Atraumatic Intracerebral Hemorrhage Treated Within the ANNEXA-4 Trial Versus Real-World Usual Care

Stroke ◽

10.1161/strokeaha.121.034572 ◽

2021 ◽

Author(s):

Hagen B. Huttner ◽

Stefan T. Gerner ◽

Joji B. Kuramatsu ◽

Stuart J. Connolly ◽

Jan Beyer-Westendorf ◽

...

Keyword(s):

Intracerebral Hemorrhage ◽

Hospital Mortality ◽

Usual Care ◽

Clinical Outcomes ◽

Factor Xa ◽

Hematoma Expansion ◽

Factor Xa Inhibitor ◽

Hematoma Volume ◽

Prothrombin Complex Concentrates ◽

Andexanet Alfa

Background and Purpose: It is unestablished whether andexanet alfa, compared with guideline-based usual care including prothrombin complex concentrates, is associated with reduced hematoma expansion (HE) and mortality in patients with factor-Xa inhibitor–related intracerebral hemorrhage (ICH). We compared the occurrence of HE and clinical outcomes in patients treated either with andexanet alfa or with usual care during the acute phase of factor-Xa inhibitor–related ICH. Methods: Data were extracted from the multicenter, prospective, single-arm ANNEXA-4 trial (Andexanet Alfa, a Novel Antidote to the Anticoagulation Effects of Factor Xa Inhibitors) and a multicenter observational cohort study, RETRACE-II (German-Wide Multicenter Analysis of Oral Anticoagulant-Associated Intracerebral Hemorrhage - Part Two). HE was based on computed tomography scans performed within 36 hours from baseline imaging. Inverse probability of treatment weighting was performed to adjust for baseline comorbidities and ICH severity. Patients presenting with atraumatic ICH while receiving apixaban or rivaroxaban within 18 hours of admission were included. Patients with secondary ICH or not fulfilling the inclusion criteria for the ANNEXA-4 trial were excluded. We compared ANNEXA-4 patients, who received andexanet alfa for hemostatic treatment, with RETRACE-II patients who were treated with usual care, primarily administration of prothrombin complex concentrates. Primary outcome was rate of HE defined as relative increase of ≥35%. Secondary outcomes comprised mean absolute change in hematoma volume, as well as in-hospital mortality and functional outcome. Results: Overall, 182 patients with factor-Xa inhibitor–related ICH (85 receiving andexanet alfa versus 97 receiving usual care) were selected for analysis. There were no relevant differences regarding demographic or clinical characteristics between both groups. HE occurred in 11 of 80 (14%) andexanet alfa patients compared with 21 of 67 (36%) usual care patients (adjusted relative risk, 0.40 [95% CI, 0.20–0.78]; P =0.005), with a reduction in mean overall hematoma volume change of 7 mL. There were no statistically significant differences among in-hospital mortality or functional outcomes. Sensitivity analysis including only usual care patients receiving prothrombin complex concentrates demonstrated consistent results. Conclusions: As compared with usual care, andexanet alfa was associated with a lower rate of HE in atraumatic factor-Xa inhibitor–related ICH, however, without translating into significantly improved clinical outcomes. A comparative trial is needed to confirm the benefit on limiting HE and to explore clinical outcomes across patient subgroups and by time to treatment.

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Abstract TP351: Microembolic Signals Monitoring in Acute Intracerebral Hemorrhage

Stroke ◽

10.1161/str.51.suppl_1.tp351 ◽

2020 ◽

Vol 51 (Suppl_1) ◽

Author(s):

Eva Rocha Ramos ◽

Izadora Deliberalli ◽

Joao Brainer ◽

Aneesh B Singhal ◽

Gisele S Silva

Keyword(s):

Atrial Fibrillation ◽

Ischemic Stroke ◽

Intracerebral Hemorrhage ◽

Intracranial Hypertension ◽

Transcranial Doppler ◽

Large Artery ◽

Hematoma Volume ◽

Ethanol Abuse ◽

Acute Intracerebral Hemorrhage ◽

The Mean

Background: The etiology of remote DWI lesions in acute intracerebral hemorrhage (ICH) is still unknown. Postulated mechanisms include intracranial or extracranial emboli, small vessel abnormalities and ischemia following acute intracranial hypertension. Our aim is to evaluate the presence of spontaneous microembolic signals (MES) using transcranial Doppler (TCD) in acute ICH patients. Methods: Twenty patients with acute ICH were prospectively enrolled and monitored with TCD for 1 hour on admission days 1, 3 and 7. TCD monitoring was performed using 2MHz probes. Results: Of the 20 patients evaluated, 40% were females and mean age was 55.6±14.1. Eight patients (40%) had dyslipidemia, 15 (75%) hypertension, 5 (20%) diabetes, 2 (10%) ethanol abuse, 6 (30%) smoking and 1 (10%) had prior ischemic stroke. Most frequent location was lobar (9 patients). The mean hematoma volume was 13,5±17,9 ml. Of six patients who underwent MRI, 2 (20%) had remote DWI lesions. Embolic sources were found in 3 patients (1 with atrial fibrillation and 2 with large artery atherosclerosis). Microembolic signals were detected in seven patients (35%). Conclusion: The high occurrence of microemboli in patients admitted with acute ICH indicates a possible embolic mechanism for DWI lesions in these patients.

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