Publications by authors named "Mark George"

Objectives: Opioid use disorder (OUD) is a large, growing, and difficult-to-treat problem. It has been associated with poor sleep, which has a relationship of mutual exacerbation with pain. These interrelationships have prompted interest in how pain catastrophizing (pain-related distortions of cognition), interacts with pain and sleep quality and quantity in those with OUD.

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Transcranial magnetic stimulation (TMS) over the left dorsolateral prefrontal cortex (L-DLPFC) is an established intervention for treatment-resistant depression (TRD), yet the underlying therapeutic mechanisms remain not fully understood. This study employs an integrative approach that combines TMS with concurrent functional magnetic resonance imaging (fMRI) and electroencephalography (EEG), aimed at assessing the acute/immediate effects of TMS on brain network dynamics and their correlation with clinical outcomes. Our study demonstrates that TMS acutely modulates connectivity within vital brain circuits, particularly the cognitive control and default mode networks.

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  • Cardiac resynchronization therapy (CRT) is effective for treating heart failure but is under-researched in patients with common comorbidities like atrial fibrillation (AF).
  • The SMART registry enrolled 2035 patients to assess CRT response based on clinical outcomes over 12 months, focusing on factors like all-cause mortality, hospitalizations, and quality of life.
  • Results showed 58.9% of patients improved, but factors like age, AF, and diabetes were linked to lower CRT responsiveness, with patients having AF experiencing higher rates of hospitalizations and mortality compared to those in normal rhythm.
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  • The study examines urological complications in patients who underwent total pelvic exenteration (TPE) for locally advanced and recurrent rectal cancer, highlighting a significant occurrence of issues post-surgery.
  • A total of 128 patients were assessed, with common complications being transient acute kidney injury and urinary tract infections, resulting in an overall complication rate of 51.6%.
  • The findings indicate that the type of cancer (LARC vs RRC) and prior radiation treatment did not significantly influence the rates of urological complications.
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Background: Few treatments are available for individuals with marked treatment-resistant depression (TRD).

Objective: Evaluate the safety and effectiveness of FDA-approved adjunctive vagus nerve stimulation (VNS) in patients with marked TRD.

Methods: This 12-month, multicenter, double-blind, sham-controlled trial included 493 adults with marked treatment-resistant major depression who were randomized to active or no-stimulation sham VNS for 12 months.

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Background: Depression treatments aim to minimize symptom burden and optimize quality of life (QoL) and psychosocial function.

Objective: Compare the effects of adjunctive versus sham vagus nerve stimulation (VNS) on QoL and function in markedly treatment-resistant depression (TRD).

Methods: In this multicenter, double-blind, sham-controlled trial, 493 adults with TRD and ≥4 adequate but unsuccessful antidepressant treatment trials (current episode) were randomized to active (n = 249) or sham (n = 244) VNS (plus treatment as usual) over a 12-month observation period.

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Background: Oral anticoagulation is recommended after ablation for atrial fibrillation among patients at high risk for stroke. Left atrial appendage closure is a mechanical alternative to anticoagulation, but data regarding its use after atrial fibrillation ablation are lacking.

Methods: We conducted an international randomized trial involving 1600 patients with atrial fibrillation who had an elevated score (≥2 in men and ≥3 in women) on the CHADS-VASc scale (range, 0 to 9, with higher scores indicating a greater risk of stroke) and who underwent catheter ablation.

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Restoring motor function after stroke necessitates involvement of numerous cognitive systems. However, the impact of damage to motor and cognitive network organization on recovery is not well understood. To discover correlates of successful recovery, we explored imaging characteristics in chronic stroke subjects by combining noninvasive brain stimulation and fMRI.

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Non-invasive ultrasound neuromodulation has experienced exponential growth in the neuroscientific literature, recently also including clinical studies and applications. However, clinical recommendations for the secure and effective application of ultrasound neuromodulation in pathological brains are currently lacking. Here, clinical experts with neuroscientific expertise in clinical brain stimulation and ultrasound neuromodulation present initial clinical recommendations for ultrasound neuromodulation with relevance for all ultrasound neuromodulation techniques.

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All definitions of treatment-resistant depression (TRD) require that patients have experienced insufficient benefit from one or more adequate antidepressant trials. Thus, identifying "failed, adequate trials" is key to the assessment of TRD. The Antidepressant Treatment History Form (ATHF) was one of the first and most widely used instruments that provided objective criteria in making these assessments.

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  • The study investigates how aerobic exercise (AEx), especially high-intensity AEx (HI), may improve neuroplasticity, which is often reduced in individuals with depression.
  • Sixteen people with depression and 13 without underwent three different exercise conditions: low-intensity AEx, high-intensity AEx, and a control (sitting).
  • Results showed that HI AEx significantly increased neuroplasticity compared to the other conditions, suggesting it could enhance treatments that focus on improving brain adaptability in depression.
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Objective: This study aims to determine if pretreating with enteral N-acetylcysteine (NAC) improves CNS oxidative stress and facilitates improvement in oromotor skills during transcutaneous auricular nerve stimulation (taVNS) paired with oral feedings in infants of diabetic mothers (IDMs) who are failing oral feeds.

Methods: We treated 10 IDMs who were gastrostomy tube candidates in an open-label trial of NAC and taVNS paired with oral feeding. NAC (75 or 100 mg/kg/dose) was given by nasogastric (NG) administration every 6 h for 4 days, then combined with taVNS paired with 2 daily feeds for another 14 days.

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This chapter covers how repetitive transcranial magnetic stimulation (rTMS) or transcranial direct current stimulation (tDCS) presently affects smoking cessation. 14 human studies have examined the efficacy of rTMS on cue craving, cigarette consumption, or smoking cessation using a variety of different coils, locations, and treatment parameters. These studies included 7 randomized-controlled trials (RCT) and 7 experimental studies.

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  • Transcranial magnetic stimulation (TMS) and deep brain stimulation (DBS) show potential in treating anxiety but lack a standardized method for identifying new targets.
  • Researchers found a common brain circuit linked to anxiety through various experiments, revealing that specific TMS and lesion sites influenced anxiety levels.
  • The study indicates that different brain circuit connections can predict changes in anxiety and highlights a new method for finding targeted treatments across various neuropsychiatric disorders.
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  • Left atrial appendage (LAA) occluder embolization is a rare but critical complication occurring mostly within the first 24 hours after the procedure, with data collected from 67 centers on 108 patients.
  • The management strategies included attempting percutaneous retrieval in 75% of cases, while 21.3% of patients underwent surgery without prior attempts, highlighting significant mortality rates associated with multiple retrieval attempts.
  • Overall, a major adverse event rate of 43.5% was observed, underscoring the serious risks, including death, particularly following unsuccessful retrievals.
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In this study we combined non-invasive transcutaneous auricular vagal nerve stimulation (taVNS) with 40 h of constraint induced movement therapy (CIMT) in infants. All infants completed the full intervention with no adverse events. Therapists were able to maintain high treatment fidelity and reported high ratings for ease of use and child tolerance.

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Stroke is one of the most common and debilitating neurological conditions worldwide. Those who survive experience motor, sensory, speech, vision, and/or cognitive deficits that severely limit remaining quality of life. While rehabilitation programs can help improve patients' symptoms, recovery is often limited, and patients frequently continue to experience impairments in functional status.

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Transcranial magnetic stimulation (TMS) is a non-invasive FDA-approved therapy for major depressive disorder (MDD), specifically for treatment-resistant depression (TRD). Though offering promise for those with TRD, its effectiveness is less than one in two patients (i.e.

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Background: Language impairment (aphasia) is a common neurological deficit after strokes. For individuals with chronic aphasia (beyond 6 months after the stroke), language improvements with speech therapy (ST) are often limited. Transcranial direct current stimulation (tDCS) is a promising approach to complement language recovery but interindividual variability in treatment response is common after tDCS, suggesting a possible relationship between tDCS and type of linguistic impairment (aphasia type).

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Aim: Total pelvic exenteration (TPE) can achieve an R0 resection in locally advanced and recurrent rectal cancer (LARC and RRC) and remains the only curative option. The resultant high morbidity creates prolonged complex recoveries, rendering patients unfit for adjuvant chemotherapy. This study aims to evaluate the impact of this on overall survival (OS) and disease-free survival (DFS) as it has not been studied previously.

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Background: Synchronizing a TMS pulse with a person's underlying EEG rhythm can modify the brain's response. It is unclear if synchronizing rTMS trains might boost the antidepressant effect of TMS. In this first-in-human trial, we demonstrated that a single TMS pulse over the prefrontal cortex produces larger effects in the anterior cingulate depending on when it is fired relative to the individual's EEG alpha phase.

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Background: Cannabis use disorder (CUD) is a common and consequential disorder. When applied to the dorsolateral prefrontal cortex (DLPFC), repetitive transcranial magnetic stimulation (rTMS) reduces craving across substance use disorders and may have therapeutic clinical effects when applied in serial-sessions. The present study sought to preliminarily determine whether serial-sessions of rTMS applied to the DLPFC had a therapeutic effect in CUD.

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