Faculty Bibliography

The term 'implantation effect' is used to describe an immediate and transient improvement in seizure frequency following an intracranial study for seizure onset localization. We conducted a retrospective analysis of 190 consecutive patients undergoing intracranial electroencephalogram (EEG) monitoring, of whom 41 had no subsequent resection/ablation/stimulation; 33 had adequate data and follow-up time available for analysis. Analysis of seizure frequency following an intracranial study showed 36% (12/33) responder rate (>50% seizure reduction) at one year, decreasing and stabilizing at 20% from year 4 onwards. In addition, we describe three patients (9%) who had long term seizure freedom of more than five years following electrode implantation alone, two of whom had thalamic depth electrodes. Electrode implantation perhaps leads to a neuromodulatory effect sufficient enough to disrupt epileptogenic networks. Rarely, this may be significant enough to even result in long term seizure freedom, as seen in our three patients.

There have been multiple descriptions of seizures during the acute infectious period in patients with COVID-19. However, there have been no reports of status epilepticus after recovery from COVID-19 infection. Herein, we discuss a patient with refractory status epilepticus 6 weeks after initial infection with COVID-19. Extensive workup demonstrated elevated inflammatory markers, recurrence of a positive nasopharyngeal SARS-CoV-2 polymerase chain reaction, and hippocampal atrophy. Postinfectious inflammation may have triggered refractory status epilepticus in a manner similar to the multisystemic inflammatory syndrome observed in children after COVID-19.

OBJECTIVE:The incidence of already common chronic subdural hematomas (CSDHs) and other nonacute subdural hematomas (NASHs) in the elderly is expected to rise as the population ages over the coming decades. Surgical management is associated with recurrence and exposes elderly patients to perioperative and operative risks. Middle meningeal artery (MMA) embolization offers the potential for a minimally invasive, less morbid treatment in this age group. The clinical and radiographic outcomes after MMA embolization treatment for NASHs have not been adequately described in elderly patients. In this paper, the authors describe the clinical and radiographic outcomes after 151 cases of MMA embolization for NASHs among 121 elderly patients. METHODS:In a retrospective review of a prospectively maintained database across 15 US academic centers, the authors identified patients aged ≥ 65 years who underwent MMA embolization for the treatment of NASHs between November 2017 and February 2020. Patient demographics, comorbidities, clinical and radiographic factors, treatment factors, and clinical outcomes were abstracted. Subgroup analysis was performed comparing elderly (age 65-79 years) and advanced elderly (age > 80 years) patients. RESULTS:MMA embolization was successfully performed in 98% of NASHs (in 148 of 151 cases) in 121 patients. Seventy elderly patients underwent 87 embolization procedures, and 51 advanced elderly patients underwent 64 embolization procedures. Elderly and advanced elderly patients had similar rates of embolization for upfront (46% vs 61%), recurrent (39% vs 33%), and prophylactic (i.e., with concomitant surgical intervention; 15% vs 6%) NASH treatment. Transfemoral access was used in most patients, and the procedure time was approximately 1 hour in both groups. Particle embolization with supplemental coils was most common, used in 51% (44/87) and 44% (28/64) of attempts for the elderly and advanced elderly groups, respectively. NASH thickness decreased significantly from initial thickness to 6 weeks, with additional decrease in thickness observed in both groups at 90 days. At longest follow-up, the treated NASHs had stabilized or improved in 91% and 98% of the elderly and advanced elderly groups, respectively, with > 50% improvement seen in > 60% of patients for each group. Surgical rescue was necessary in 4.6% and 7.8% of cases, and the overall mortality was 8.6% and 3.9% for elderly and advanced elderly patients, respectively. CONCLUSIONS:MMA embolization can be used safely and effectively as an alternative or adjunctive minimally invasive treatment for NASHs in elderly and advanced elderly patients.

The understanding and management of epileptic spasms has considerably evolved since the mid 19th century. The realization that epileptic spasms can be generated from a focal brain lesion played a pivotal role in the development of neurosurgical management for intractable forms of this epilepsy. During pre-surgical planning, the addition of functional FDG PET imaging has further refined the electroencephalographic localization of epileptogenic lesions. In some cases, neurosurgical resection of a focus that is co-localized by the FDG PET scan and electroencephalography can lead to partial or complete reversal of developmental delay along with reduced seizure frequency or seizure freedom. In cases where near-complete hemispheric cortex is implicated in spasm generation, subtotal hemispherectomy has shown encouraging results. Moreover, palliative resection of the major perpetrating focus in carefully chosen patients with bilateral multifocal spasms has also led to favorable outcomes. However, in patients with tuberous sclerosis with high tuber burden, the localizing value of FDG PET imaging may be limited. In such cases, employment of AMT PET technology has become a valuable tool for localization of actively epileptogenic tubers. This article highlights the historic steps in the successful advancements of neurosurgical interventions for the treatment of intractable epileptic spasms.

Objective: To describe sociodemographic differences between individuals with advanced Parkinson's Disease (PD) still receiving care in an outpatient clinic vs. those enrolled in an interdisciplinary home visit study.
Background(s): Individuals with PD from underrepresented minority backgrounds face disparities in access to expert neurologic care. Such disparities also persist in PD research participation, sometimes attributed to mistrust and stigma. As minority patients become homebound, they are further estranged from care and research representation. We launched an interdisciplinary home visit study to extend continuity of care to homebound individuals with advanced PD. Here, we seek to identify sociodemographic differences between home visit (HV) participants and the outpatient (OP) clinic population from which they were recruited to determine whether disparities in care and research enrollment among minority patients persist with this patient-centered, care-focused intervention. Design/Methods: Cross-sectional study comparing individuals with advanced PD-Hoehn & Yahr stage >3-drawn from a single movement disorders center between 2017- 2019. We conducted a chart review for demographic information and used t-tests or Wilcoxon signed-rank tests as appropriate to assess population differences.
Result(s): The HV population is significantly older (n = 58 HV, 1015 OP; mean age 78.4 (SD 7.5) vs. 75.0 (SD 9.2), respectively, p = 0.002) and includes nearly twice the percentage of minority patients (26.3% non-Caucasian vs. 14.7% non-Caucasian in OP, p = 0.02). As expected, HV had worse PD severity, with 62.1% stage 4 and 17.2% stage 5, vs. 28.6% and 11.0% of OP, respectively (p <0.0001).
Conclusion(s): The proportion of minority patients with advanced PD enrolled in a home-based study is significantly greater than that receiving care in the OP setting from which they originated. This suggests that social determinants of health may contribute to advanced PD patients from underrepresented minorities becoming lost to follow-up earlier than white patients. We are actively comparing our homebound population with matched controls from a longitudinal national registry to determine the generalizability of this finding. Our results suggest that despite their advanced age, disease, and homebound status, this population is amenable to research participation. Ultimately, continued access to care poses a large but surmountable hurdle to research participation for minority patients

Objective: Test the null hypothesis that Level III support measures do not differ between Chinese and Caucasian nulliparous women with normal support.
Method(s): Pelvic floor 3D MRIs at rest were analyzed (Image J, 3D slicer v. 4.10.1) from Chinese and Caucasian nulliparous women with no prolapse at/below the hymen. Urogenital hiatus (UGH), levator hiatus (LH), and levator bowl volume (LBV) were measured and levator plate (LP) was traced (Figure 1A-D). Perineal body (PB) location was measured relative to Pelvic Inclination Correction System (PICS) line, 34degree below the SCIPP line. Muscle fiber directions were traced for the pubococcygeus (PCM), puborectalis (PR), and external anal sphincter muscles (EAS) in parasagittal slides (Figure1E-F). LP shape was analyzed using principal component analysis (PCA) (Figure 2C-D). Student's t-test was used to compare measurements between groups.
Result(s): Eleven Chinese and 10 Caucasian women were included with average ages of 28+/-3 and 23+/-2 years, respectively (P<.001). BMI was lower in Chinese women (21.5+/-2.5kg/m2 vs 25.6+/-5.6kg/m2, P=.04) and height was similar (1.63 +/-0.06m vs 1.65+/-0.12m, P=.56). Chinese women had 18% smaller UGH, 10% smaller LH and 33% smaller LBV compared to Caucasian women at rest (Figure 2A). PB position was higher in Chinese versus Caucasian women (-2mm vs-12mm, P<.001). PCM fiber direction was more horizontal in Chinese women compared to Caucasian women (16+/-12degree vs 25+/-5degree, P=.047), while the direction of PR (-21+/-5degree vs-20+/-5degree, P=.91) and EAS (-49+/-9degree vs-51 +/-10degree, P=.80) are similar (Figure 2B). PCA showed the LP is significantly more horizontal in Chinese than Caucasian women (PC1 score for Chinese-6.5 vs Caucasian 7.1, P=.020).
Conclusion(s): We reject our null hypothesis. In nulliparas with normal support, Chinese women have a smaller hiatus size and LBV than Caucasian women and their PCM fiber direction and LP shape are oriented more horizontally. Comment: This analysis is consistent with the hypothesis that PCM fiber direction varies with LP shape and bowl volume. These baseline differences in anatomy may influence birth injury, mechanism of prolapse, and treatment outcomes

BACKGROUND:Ideal timing of postoperative beta-blockers is unclear. We hypothesized that patients who do not receive beta-blockers immediately after cardiac surgery would have increased in-hospital mortality (primary outcome) and postoperative hemodynamic, pulmonary, neurologic, or respiratory complications (secondary outcomes). METHODS:We performed a retrospective cohort study evaluating patients who underwent cardiac surgery at our institution from January 1, 2013 to September 30, 2017. We compared outcomes between patients who received beta-blockers by postoperative day (POD) 5 with outcomes in patients who did not receive beta-blockers at any time or received them after POD 5. Inverse probability of treatment weighting was used to minimize confounding. Univariate logistic regression analyses were performed on the weighted sets using absent or delayed beta-blockers as the independent variable and each outcome as dependent variables in separate analyses. A secondary analysis was performed in patients prescribed preoperative beta-blockers. E-values were calculated for significant outcomes. RESULTS:All results were confounder adjusted. Among patients presenting for cardiac surgery, not receiving beta-blockers by POD 5 or at any time was not associated with the primary outcome in-hospital mortality, estimated odds ratio (OR; 99.5% confidence interval [CI]) of 1.6 (0.49-5.1), P = .28. Not receiving beta-blockers by POD 5 or at any time was associated with postoperative atrial fibrillation, estimated OR (99.5% CI) of 1.5 (1.1-2.1), P < .001, and pulmonary complications, estimated OR (99.5% CI) of 3.0 (1.8-5.2), P < .001. E-values were 2.4 for postoperative atrial fibrillation and 5.6 for pulmonary complications. Among patients presenting for cardiac surgery taking preoperative beta-blockers, not receiving beta-blockers by POD 5 or at any time was not associated with the primary outcome mortality, with estimated OR (99.5% CI) of 1.3 (0.43-4.1), P = .63. In this subset, not receiving beta-blockers by POD 5 or at any time was associated with increased adjusted ORs of postoperative atrial fibrillation (OR = 1.6; 99.5% CI, 1.1-2.4; P < .001) and postoperative pulmonary complications (OR = 2.8; 99.5% CI, 1.6-5.2; P < .001). Here, e-values were 2.7 for postoperative atrial fibrillation and 5.1 for pulmonary complications. For the sensitivity analyses for secondary outcomes, exposure and outcome periods overlap. Outcomes may have occurred before or after postoperative beta-blocker administration. CONCLUSIONS: Among patients who undergo cardiac surgery, not receiving postoperative beta-blockers within the first 5 days after cardiac surgery or at any time is not associated with in-hospital mortality and is associated with, but may not necessarily cause, postoperative atrial fibrillation and pulmonary complications.

Head and neck tumors can affect afferent baroreceptor neurons and either interrupt or intermittently increase their signaling, causing blood pressure to become erratic. When the afferent fibers of the baroreflex are injured by surgery or radiotherapy or fail to develop as in familial dysautonomia, their sensory information is no longer present to regulate arterial blood pressure, resulting in afferent baroreflex failure. When the baroreflex afferents are abnormally activated, such as by paragangliomas in the neck, presumably by direct compression, they trigger acute hypotension and bradycardia and frequently syncope, by a mechanism similar to the carotid sinus syndrome. We describe our observations in a large series of 23 patients with afferent baroreflex dysfunction and the cardiovascular autonomic features that arise when the sensory baroreceptor neurons are injured or compressed. The management of afferent baroreceptor dysfunction is limited, but pharmacological strategies can mitigate blood pressure swings, improve symptoms, and may reduce hypertensive organ damage. Although rare, the prevalence of afferent baroreflex dysfunction appears to be increasing in middle-aged men due to human papillomavirus related oropharyngeal cancer.

Background. Mab is a MDR nontuberculous mycobacterium that causes lung infections in patients with structural lung disease. Mab harbors a chromosomally encoded class A beta-lactamase, BlaMab, able to hydrolyze penicillins, cephalosporins and carbapenems. L,D- and D,D-transpeptidases (L,D TP and D,D TP) shape peptidoglycan (PG) synthesis and contribute to cell wall structure. Select combinations of beta-lactams that inhibit L,D TP and D,D TPs and BlaMab are desirable as they can potentially improve treatment outcomes. DUR is a novel