Naaem Simaan

Dr. Naaem Simaan


Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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17 February 2022 in Journal of Clinical Medicine
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NSNaaem Simaan
Naaem Simaan
JMJeremy Molad
Jeremy Molad
SPShlomi Peretz
Shlomi Peretz
AFAndrei Filioglo
Andrei Filioglo
EAEitan Auriel
Eitan Auriel
AHAsaf Honig
Asaf Honig
Patients with cerebral venous sinus thrombosis (CVST) occasionally present with intracerebral hemorrhage (ICH). In this study, we aimed to identify predictors for ICH in CVST patients. Prospective CVST databases from three academic centers were retrospectively analyzed. CVST patients with and without ICH upon presentation were compared. Among the 404 included patients (mean age 41.8 years, 33% male), 74 (18.3%) had an ICH. The patients with ICH were older (45 ± 20.6 vs. 41.1 ± 18 years, p = 0.045), and were more often pregnant or postpartum women (15% vs. 6%, p = 0.011), or chronically hypertensive (15% vs. 5%, p = 0.001). The ICH patients had higher rates of seizures (60% vs. 15%, p < 0.001), and focal neurological deficits (53% vs. 23%, p < 0.001). The ICH group had lower rates of excellent outcome measured by 90-day mRS 0 (56.7% vs. 80.3%, p < 0.001) and higher rates of 90-day mortality (8% vs. 3%, p = 0.041). Radiological variables associated with ICH included superior sagittal sinus (SSS) thrombosis (63% vs. 36%), isolated cortical vein thrombosis (38% vs. 8%), and presence of venous infarction (34% vs. 7%) (p < 0.001 for all). Upon multivariate analysis, chronic hypertension (OR 3.7, p = 0.027), being either pregnant or postpartum (OR 4.3, p = 0.006), isolated cortical thrombosis (OR 3.5, p = 0.007), and SSS involvement (OR 3.4, p < 0.001) were independently associated with ICH upon admission. In conclusion, among CVST patients, the following present higher for ICH: pregnant or postpartum women, and individuals with chronic hypertension, cortical vein, or SSS involvement.

Verified
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NSNaaem Simaan
Naaem Simaan
LFLeen Fahoum
Leen Fahoum
AFAndrei Filioglo
Andrei Filioglo
SAShorooq Aladdin
Shorooq Aladdin
KBKarine Wiegler Beiruti
Karine Wiegler Beiruti
RLRonen R. Leker
Ronen R. Leker
(1) Background: Multiple acute concomitant cerebral infarcts (MACCI) are relatively uncommon. Data regarding the characteristics and outcomes of patients with MACCI are lacking. We, therefore, aimed to characterize the clinical features of MACCI. (2) Methods: Patients with MACCI were identified from a prospective registry of stroke patients admitted to a tertiary teaching center. Patients with an acute single embolic stroke (ASES) involving only one vascular bed served as controls. (3) Results: MACCI was diagnosed in 103 patients who were compared to 150 patients with ASES. MACCI patients were significantly older (p = 0.010), more often had a history of diabetes (p = 0.011) and had lower rates of ischemic heart disease (p = 0.022). On admission, MACCI patients had significantly higher rates of focal signs (p < 0.001), an altered mental state (p < 0.001) and seizures (p = 0.036). The favorable functional outcome was significantly less common in patients with MACCI (p = 0.006). In the multivariable analysis, MACCI was associated with lower chances of achieving favorable outcomes (odds ratio: 0.190, 95% CI: 0.070–0.502). (4) Conclusions: There are important differences in clinical presentation, comorbidities and outcomes between MACCI and ASES. MACCI is less often associated with favorable outcomes and could represent a more severe form of a stroke compared with a single embolic stroke.

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AHAsaf Honig
Asaf Honig
HHHen Hallevi
Hen Hallevi
NSNaaem Simaan
Naaem Simaan
TSTzvika Sacagiu
Tzvika Sacagiu
ESEstelle Seyman
Estelle Seyman
JMJeremy Molad
Jeremy Molad
Current guidelines advocate intravenous thrombolysis (IVT) prior to endovascular thrombectomy (EVT) for all patients with acute ischemic stroke (AIS) due to large vessel occlusion (LVO). We evaluated outcomes with and without IVT pretreatment. Our institutional protocols allow AIS patients presenting early (<4 h from onset or last seen normal) who have an Alberta Stroke Program Early CT Score (ASPECTS) ≥6 to undergo EVT without IVT pretreatment if the endovascular team is in the hospital (direct EVT). Rates of recanalization and hemorrhagic transformation (HT) and neurological outcomes were retrospectively compared in consecutive patients undergoing IVT+EVT vs. direct EVT with subanalyses in those ≥80 years and ≥85 years. In the overall cohort (IVT+EVT = 147, direct EVT = 162), and in subsets of patients ≥80 years (IVT+EVT = 51, direct EVT = 50) and ≥85 years (IVT+EVT = 19, direct EVT = 32), the IVT+EVT cohort and the direct EVT group had similar baseline characteristics, underwent EVT after a comparable interval from symptom onset, and reached similar rates of target vessel recanalization. No differences were observed in the HT frequency, or in disability at discharge or after 90 days. Patients receiving direct EVT underwent more stenting of the carotid artery due to stenosis during the EVT procedure (22% vs. 6%, p = 0.001). Direct EVT and IVT+EVT had comparable neurological outcomes in the overall cohort and in the subgroups of patients ≥80 and ≥85 years, suggesting that direct EVT should be considered in patients with an elevated risk for HT.

29 December 2023 in Journal of Clinical Medicine
Verified
Journal Article
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NSNaaem Simaan
Naaem Simaan
TJTamer Jubeh
Tamer Jubeh
FSFatma Shalabi
Fatma Shalabi
HJHamza Jubran
Hamza Jubran
IMIssa Metanis
Issa Metanis
RLRonen R. Leker
Ronen R. Leker
(1) Background: The mechanism responsible for stroke in patients younger than 50 often remains unknown. This study was designed to assess whether high-resolution intracranial vessel wall MR imaging (icVWI) may be instrumental in determining stroke cause. (2) Methods: Young stroke patients with and without an identified cause of stroke despite an exhaustive investigation were prospectively included. Patients who underwent icVWI were compared to those who did not. We next compared patients with and without intracranial vulnerable plaques on icVWI. (3) Results: Overall, 47 young stroke patients were identified over the span of 2 years and included in this study. Of those, 20 (42%) underwent intracranial icVWI. Cancer prevalence was higher among patients who did not have an icVWI study (19% vs. 0% p = 0.042) but there were no other significant differences between patients who had an icVWI study and those who did not have an icVWI. Among patients who had an icVWI, 11 (55%) had vulnerable plaques and the remaining nine studies were negative. Patients with positive icVWI scans had significantly higher stroke severity at admission (mean ± SD NIHSS score 5.5 ± 3.5 vs. 1.7 ± 2.3, p = 0.012). Patients with positive icVWI scans were more often treated with antiplatelets upon discharge (100% vs. 67%, p = 0.038). (4) Conclusions: icVWI can add significant information relevant to stroke pathogenesis and secondary prevention among young stroke patients with a negative exhaustive diagnostic workup.

Verified
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IMIssa Metanis
Issa Metanis
NSNaaem Simaan
Naaem Simaan
YSYoel Schwartzmann
Yoel Schwartzmann
TJTamer Jubeh
Tamer Jubeh
AHAsaf Honig
Asaf Honig
RLRonen R. Leker
Ronen R. Leker
(1) Background: Cervical arterial dissections (CeAD) are a common cause of stroke in young adults. CeAD can be spontaneous (sCeAD) or traumatic (tCeAD). Whether CeAD subtypes differ in clinical, radiological, and outcome characteristics remains unexplored. (2) Methods: Patients with CeAD were identified and divided between sCeAD and tCeAD. Demographics, clinical features, risk factors, imaging findings, treatments, and outcomes were compared between the groups. Logistic regressions were used to determine characteristics associated with favorable outcome. (3) Results: Overall, 154 patients were included (106 sCeAD and 48 tCeAD). Patients with sCeAD were significantly older (mean ± SD 46 ± 12 vs. 35 ± 14, p < 0.001) and were more likely to have hyperlipidemia (19% vs. 4%, p = 0.016), but other risk factors did not differ. Patients with tCeAD less often had signs of early infarction on imaging (21% vs. 49%, p = 0.001) and had lower stroke severity on admission (NIHSS, median, interquartile range [IQR] 0 (0–9) vs. 2 (0–4), p = 0.012), but more often had symptomatic intracranial hemorrhages (12.5% vs. 2%, p = 0.006). Patients with tCeAD less often had favorable outcomes at 90 days (78% vs. 97%, p < 0.001). In the regression analysis, the only variables associated with favorable outcome were age (odds ratio [OR] 1.13, 95% confidence interval [CI] 1.03–1.24), initial stroke severity (OR 0.84, 95% CI 0.73–0.97), degree of vessel stenosis (OR 0.35, 95% CI 0.14–0.83), and involvement of multiple vessels on presentation (OR 0.04, 95% CI 0.02–0.70), whereas dissection subtype was not associated (OR 0.45, 95% CI 0.03–68.80). (4) Conclusions: Dissection subtype is not an independent modifier of the chances of attaining functional independence.

21 March 2025 in Biomedicines
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DADia Alwilly
Dia Alwilly
SSSaher Srour
Saher Srour
INIrina Nordkin
Irina Nordkin
AHAsaf Honig
Asaf Honig
KBKarine Wiegler Beiruti
Karine Wiegler Beiruti
NSNaaem Simaan
Naaem Simaan
Background/Objectives: Previously undiagnosed atrial fibrillation (PUAF) is a significant cause of embolic stroke of undetermined source (ESUS). This study aimed to determine whether early heart rhythm monitoring with a Holter ECG after acute stroke enhances the detection of PUAF compared to standard ambulatory monitoring in ESUS patients, assuming that early cardiac monitoring would lead to a higher detection rate of PUAF. Methods: This cohort study included 100 patients aged 50 and older diagnosed with ESUS and exhibiting sinus rhythm for at least 24 h. All participants were hospitalized in a stroke unit and underwent 48 h of Holter ECG monitoring. A group of 100 ESUS patients who underwent outpatient delayed Holter ECG monitoring served as controls. Results: This study revealed a significantly higher detection rate of AF in the hospitalized group compared to the outpatient group (20% vs. 5%; p = 0.001). The mean age and distribution of risk factors, including hypertension, diabetes, hyperlipidemia, ischemic heart disease, heart failure, chronic kidney disease, smoking, previous stroke, and malignancy, did not differ between the groups. There were no significant differences in initial stroke severity or in outcomes between the groups. Conclusions: Early Holter ECG monitoring in the hospitalized ESUS patients significantly increased the detection rate of PUAF compared to ambulatory monitoring, highlighting the importance of timely cardiac assessment in stroke management.