Publications by authors named "Arash Nayeri"

Immune checkpoint inhibitor therapy has revolutionized the treatment of advanced malignancies in recent years. Numerous reports have detailed the myriad of possible adverse inflammatory effects of immune checkpoint therapies, including within the cardiovascular system. However, these reports have been largely limited to myocarditis.

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Since 2007, the electronic cigarette (EC), with its increasingly diverse array of device options, has gained popularity both among long-term tobacco cigarette (TC) smokers and among never-smoking youth. The absence of a number of known toxic by-products of TC smoking has helped cultivate the perception that ECs are healthy. However, an expanding literature has provided concerning evidence that a number of EC constituents, including nicotine, and their thermal degradation by-products may have adverse effects, including cardiovascular effects.

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Takotsubo cardiomyopathy (TC) is associated with significant short-term morbidity and mortality. Several risk factors for poor outcomes have been identified; however, the prognostic implications of pre-existing comorbidity in TC are poorly delineated. We sought to assess the association of aggregate pre-existing comorbidity with short-term outcomes in TC.

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Background: There is significant interindividual variability in the rate of aortic stenosis (AS) progression that is not accounted for in the current surveillance algorithms. We sought to examine the association between changes in peak aortic jet velocity (Vmax) and mean gradient (MG) among patients with mild or moderate AS and risk of progression to severe disease.

Methods: Adult subjects referred for echocardiography at a single academic referral center with a diagnosis of mild or moderate AS and ≥2 additional surveillance echocardiograms were included in the study.

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Background: Takotsubo cardiomyopathy (TC), also known as stress-induced cardiomyopathy, has been increasingly described in relation to psychiatric illness.

Methods: We performed a literature review to identify the key findings related to psychiatric illness in TC that may be relevant to the practice of mental health and other health care providers.

Results: The association of psychiatric illness with TC in addition to the spectrum of psychiatric illness found in TC, the role of exacerbation or treatment of psychiatric illness in triggering TC, different modes of presentation, prognostic implications, and long-term management of psychiatric illness in TC are discussed.

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Objective: We compared the angiographic and clinical outcomes of heparin and bivalirudin in patients who underwent orbital atherectomy for severely calcified coronary lesions.

Background: Severely calcified coronary lesions are associated with increased ischemic complications. Orbital atherectomy modifies calcified plaque, thereby facilitating stent delivery and stent expansion.

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Objective: We assess the angiographic and clinical outcomes of patients with a history of coronary artery bypass graft (CABG) surgery who underwent orbital atherectomy for the treatment of severely calcified coronary lesions.

Background: The presence of severe coronary artery calcification (CAC) increases the complexity of percutaneous coronary intervention (PCI) and is associated with worse clinical outcomes. Patients with a history of CABG who undergo PCI often have comorbidities and are at higher risk for ischemic complications.

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Hypokalemia has been consistently reported as a common occurrence during targeted temperature management (TTM) in comatose survivors of cardiac arrest. We sought to better describe changes in serum potassium throughout the different stages of TTM and to assess for any prognostic significance. We analyzed a prospectively collected cohort of 240 patients treated with TTM following cardiac arrest at a tertiary care hospital between 2007 and 2014.

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Background: The increased prevalence of psychiatric illness among patients with takotsubo cardiomyopathy (TC) has been previously described.

Objectives: We sought to assess the effect of pre-existing psychiatric illness on clinical outcomes following the diagnosis of TC.

Methods: Adults diagnosed with TC at Vanderbilt University Medical Center between 1999 and 2015 were included in the study.

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The prognostic significance of chronic medical illness in comatose survivors of cardiac arrest who undergo targeted temperature management (TTM) remains largely unknown. We sought to assess the association between overall burden of pre-existing medical comorbidity and neurological outcomes in survivors of cardiac arrest undergoing TTM. We analyzed a prospectively collected cohort of 314 patients treated with TTM following cardiac arrest at a tertiary care hospital between 2007 and 2014.

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Short-term complications, particularly rehospitalization, after a diagnosis of takotsubo cardiomyopathy (TTC) are poorly described. We sought to characterize the rates, causes, clinical associations, and prognostic implications of early rehospitalization in this patient population. We performed a retrospective observational study of all adult subjects diagnosed with TTC at an academic tertiary care hospital from 2005 to 2015.

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Introduction: Recent studies on comatose survivors of cardiac arrest undergoing targeted temperature management (TTM) have shown similar outcomes at multiple target temperatures. However, details regarding core temperature variability during TTM and its prognostic implications remain largely unknown. We sought to assess the association between core temperature variability and neurological outcomes in patients undergoing TTM following cardiac arrest.

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Objectives: In recent years, there has been increased recognition of the relationship between type 2 diabetes mellitus (DM) and poor outcomes following a variety of surgical procedures. We sought to study the role of type 2 DM as a prognostic factor affecting the long-term survival of patients undergoing surgical resection of a WHO Grade I meningioma.

Methods: We conducted a retrospective cohort study on 196 patients who had a WHO Grade I meningioma resected at our institution between 2001 and 2013.

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Objectives To quantify the rates of loss of follow-up after meningioma resection and to identify any key demographical associations. Design Retrospective cohort. Setting Vanderbilt University Medical Center, 2001-2013.

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The optimal timing and frequency of postoperative imaging surveillance after a meningioma resection are not well-established. The low recurrence rates and slow growth of World Health Organization (WHO) Grade I meningiomas in particular have raised doubts about the utility of postoperative imaging surveillance. We sought to analyze the cost and utility of asymptomatic surveillance imaging in elderly patients after the resection of a WHO Grade I meningioma.

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Previous authors have identified a number of factors that predict morbidity, mortality, and recurrence in patients undergoing resection of a meningioma. We sought to study a novel potential prognostic indicator: early postoperative visit to the emergency department (ED). We conducted a retrospective cohort study on 239 patients who underwent a meningioma resection at our institution between 2001 and 2013 with over 3 months of follow-up postoperatively.

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Objectives To determine the cost of annual magnetic resonance imaging (MRI) surveillance after resection of nonfunctioning pituitary adenomas (NFPAs) and its effectiveness in reducing visual compromise due to tumor recurrence. Design Retrospective case series. Setting Vanderbilt University Medical Center (2003-2011).

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OBJECT Misrepresentation of scholarly achievements is a recognized phenomenon, well documented in numerous fields, yet the accuracy of reporting remains dependent on the honor principle. Therefore, honest self-reporting is of paramount importance to maintain scientific integrity in neurosurgery. The authors had observed a trend toward increasing numbers of publications among applicants for neurosurgery residency at Vanderbilt University and undertook this study to determine whether this change was a result of increased academic productivity, inflated reporting, or both.

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Article Synopsis
  • * Researchers used affinity purification and mass spectrometry to discover over 80 potential actin-binding proteins in Giardia, some of which resemble known actin-associated proteins.
  • * The study validated the localization and interaction of seven proteins, suggesting that Giardia, despite lacking typical actin-binding proteins, retains a crucial set of actin-interacting proteins that may reflect early evolutionary functions of the actin cytoskeleton.
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