Publications by authors named "Iskander M"

Article Synopsis
  • The meta-analysis compares long-term outcomes of transcatheter aortic valve replacement (TAVR) and surgical aortic valve replacement (SAVR) in low-surgical risk patients with severe aortic stenosis.
  • TAVR showed lower all-cause mortality risk within 30 days and up to one year compared to SAVR, but risks were similar after one year.
  • Additionally, TAVR had lower rates of cardiovascular mortality, disabling strokes, rehospitalizations, and new-onset atrial fibrillation, but a higher chance of needing a permanent pacemaker, especially in the first 30 days.
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We present the case of a 36-year-old female with Factor V Leiden mutation taking warfarin, who presented to the emergency department with swelling in the abdominal and bilateral lower extremities. Initial assessment revealed an international normalized ratio (INR) of 5.0.

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An 86-year-old female with history of surgical aortic valve replacement presented with clinical signs of heart failure. Echocardiography revealed a reduction in left ventricular systolic function and severe bioprosthetic aortic valve dysfunction. This is the first reported case of valve-in-valve transcatheter aortic valve replacement with concomitant undermining iatrogenic coronary obstruction with radiofrequency needle procedure in a surgical bioprosthetic valve.

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Background: Acute kidney injury (AKI) is one of the preventable complications of percutaneous coronary intervention (PCI). This study aimed to develop machine learning (ML) models to predict AKI after PCI in patients with acute coronary syndrome (ACS).

Methods: This study was conducted at Tehran Heart Center from 2015 to 2020.

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Prcis: Residence in a middle-class neighborhood correlated with lower follow-up compared with residence in more affluent neighborhoods. The most common explanations for not following up were the process of making an appointment and lack of symptoms.

Purpose: To explore which individual-level and neighborhood-level factors influence follow-up as recommended after positive ophthalmic and primary care screening in a vulnerable population using novel methodologies.

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Structural health monitoring of civil infrastructure is a crucial component of assuring the serviceability and integrity of the built environment. A primary material used in the construction of civil infrastructure is concrete, a material that is susceptible to cracking due to a variety of causes, such as shrinkage, creep, overloading, and temperature change. Cracking reduces the durability of concrete structures, as it allows deleterious environmental agents to penetrate the surface, causing such damage as corrosion of steel reinforcement and delamination of the concrete itself.

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Pericardiocentesis (PC) in patients with pulmonary hypertension (PH) and pericardial effusions has unclear benefits because it has been associated with acute hemodynamic collapse and increased mortality. Data on in-hospital outcomes in this population are limited. The National Inpatient Sample database was used to identify adult patients who underwent PC during hospitalizations between 2016 and 2020.

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Article Synopsis
  • Transcatheter aortic valve replacement (TAVR) is now a viable treatment for patients with severe aortic stenosis, including those at lower surgical risk, due to improved technology and experience, which has reduced complications.
  • A significant concern with TAVR is the risk of stroke, which many patients view as more severe than death, prompting the need for strategies to prevent it.
  • The paper will explore the causes and predictors of stroke after TAVR, review existing cerebral embolic protection devices, their design, and clinical studies, and provide recommendations for their use in patients undergoing the procedure.
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Purpose: Cost-effectiveness analyses (CEAs) quantify and compare both costs and measures of efficacy for different interventions. As the costs of glaucoma management to patients, payers, and physicians are increasing, we seek to investigate the role of CEAs in the field of glaucoma and how such studies impact clinical management.

Methods: We adhered to the "Preferred Reporting Items for Systematic Reviews and Meta-analyses" guidelines for our systematic review structure.

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Background: Environmental factors have been implicated in various eye pathologies. The purpose of this review is to synthesise the published research on environmental effects on eye disease.

Methods: Four databases were searched for terms relating to environmental exposures and ophthalmic disease.

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Purpose: To validate and assess user satisfaction and usability of the New York University (NYU) Langone Eye Test application, a smartphone-based visual acuity (VA) test.

Design: Mixed-methods cross-sectional cohort study.

Participants: Two hundred forty-four eyes of 125 participants were included.

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Aim: Filifactor alocis has recently emerged as a periodontal pathobiont that appears to thrive in the oral cavity of smokers. We hypothesized that identification of smoke-responsive F. alocis genes would provide insight into adaptive strategies and that cigarette smoke would enhance F.

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Management of large right heart thrombi and vegetations is challenging. Medical management may be insufficient to prevent embolization or treat infection. Surgery carries a high mortality and is often not an option for these patients with multiple comorbidities.

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As of 2020, it is estimated that 43.3 million people are blind, and an additional 553 million have mild to severe vision impairment. At least 1 billion worldwide have a vision impairment that could have been prevented or has yet to be addressed.

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Protection from waves and providing an appropriate calmness ratio are vital requirements in the designing phase of a harbor. Another crucial issue is guaranteeing sufficient water circulation as a key indicator for water quality and avoiding the associated environmental problems of poor water quality conditions. In a coastal harbor, the interior basin's water quality largely depends on the harbor's natural/self-ability to flush out different existing pollutants.

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Elevated plasma lipid levels, especially low-density lipoprotein, are correlated with atherosclerotic cardiovascular disease (ASCVD) and increased risk of ischemic heart disease and stroke. Statins are first-line agents for reducing low-density lipoprotein cholesterol (LDL-C) and the risk of major cardiovascular events, but patients with a genetic susceptibility or established ASCVD oftentimes remain subtherapeutic on statin therapy alone. Biotechnological advancements in medication therapy have led to the development of inclisiran, a recently approved twice-yearly injectable agent to help patients with heterozygous familial hypercholesterolemia and clinical ASCVD on a maximally tolerated statin to reach LDL-C targets.

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Background: Delirium is the most common postoperative complication in older adults, though anesthesiologist awareness of delirium prevention guidelines-and associated practice trends-remains unknown.

Methods: This was a convergent mixed-methods study, which simultaneously analyzed quantitative and qualitative data to determine delirium guideline awareness among anesthesiologists and practice patterns based on guideline recommendations. Quantitative data were abstracted from the Multicenter Perioperative Outcomes Group database for noncardiac surgery patients (2009-2020) aged 65 years and older.

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Background: Post-procedural hospital length of stay (P-LOS) is an important determinant of cost-related outcomes. In the present study, we aimed to assess the impact of P-LOS on short-term outcomes after transcatheter aortic valve replacement (TAVR) and MitraClip.

Methods: We performed a retrospective cohort study, retrieving data from the National Readmissions Database (NRD) for patients who underwent transfemoral TAVR and MitraClip between January 2014 and December 2017.

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This article compares measurements of particle shape parameters from three-dimensional (3D) X-ray micro-computed tomography (μCT) and two-dimensional (2D) dynamic image analysis (DIA) from the optical microscopy of a coastal bioclastic calcareous sand from Western Australia. This biogenic sand from a high energy environment consists largely of the shells and tests of marine organisms and their clasts. A significant difference was observed between the two imaging techniques for measurements of aspect ratio, convexity, and sphericity.

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Pore scale analysis of flow through porous media is of interest because it is essential for understanding internal erosion and piping, among other applications. Past studies have mainly focused on exploring macroscopic flow to infer microscopic phenomena. An innovative method is introduced in this study which permits visualization of interstitial fluid flow through the pores of a saturated synthetic transparent granular medium at the microscale.

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Objective: To characterise the clinical course of delirium for patients with COVID-19 in the intensive care unit, including postdischarge neuropsychological outcomes.

Design: Retrospective chart review and prospective survey study.

Setting: Intensive care units, large academic tertiary-care centre (USA).

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Purpose: Most published systematic reviews have focused on the use of virtual reality (VR)/augmented reality (AR) technology in ophthalmology as it relates to surgical training. To date, this is the first review that investigates the current state of VR/AR technology applied more broadly to the entire field of ophthalmology.

Methods: PubMed, Embase, and CINAHL databases were searched systematically from January 2014 through December 1, 2020.

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Background: Data on the diagnostic and prognostic value of subtle abnormalities on myocardial perfusion imaging (MPI) are limited.

Methods And Results: In a retrospective single-center cohort of patients who underwent regadenoson SPECT-MPI, near-normal MPI was defined as normal left ventricular ejection fraction (LVEF ≥ 50%) and a summed stress score (SSS) of 1-3 vs SSS = 0 in normal MPI. Borderline ischemia was defined as normal LVEF, SSS = 1-3, and a summed difference score (SDS) of 1 vs SDS = 0 in the absence of ischemia.

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Background: There are limited data on the prognostic utility of regadenoson SPECT myocardial perfusion imaging (MPI) in patients with end-stage renal disease (ESRD).

Methods And Results: In a single-center, retrospective study, we analyzed consecutive ESRD patients who underwent regadenoson SPECT-MPI. The severity of MPI abnormalities and ischemic burden were determined quantitatively.

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