15 results on '"Khir F"'
Search Results
2. Impact of high-intensity statin therapy on glycemic control post-acute coronary syndrome using real-world data
- Author
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Rahhal, A, primary, Mahfouz, A, additional, Khir, F, additional, Abdelghani, M, additional, Alkhalaila, O, additional, Aljundi, A, additional, Ashour, A, additional, Alahmad, Y, additional, Alyafei, S, additional, and Arabi, A, additional
- Published
- 2022
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3. Sizing verification of a 4kWp retrofitted grid-connected photovoltaic system: a case study in Shah Alam, Malaysia
- Author
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Shukor, F.A.M., primary, Zainuddin, H., additional, Manja, A., additional, and Khir, F. L. M., additional
- Published
- 2020
- Full Text
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4. Nitrate ion detection using AlGaN/GaN heterostructure-based devices without a reference electrode
- Author
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Myers, M, Khir, F, Podolska, Anna, Umana-Membreno, G, Nener, B, Baker, M, Parish, G, Myers, M, Khir, F, Podolska, Anna, Umana-Membreno, G, Nener, B, Baker, M, and Parish, G
- Abstract
AlGaN/GaN heterostructure-based devices can be engineered through heterostructure design to have a high transconductance near zero gate–drain voltage, potentially enabling high sensitivity, reference electrode free, ion sensing. As a proof of concept, these devices were coated with a PVC-based membrane containing a plasticizer and an ionophore to detect nitrate ions in solution. The sensor response is measured as a change in conductivity across two contacts using a Kelvin probe (or four-contact) geometry, with the current between the two outer contacts kept constant. We show that this sensor for nitrate is sensitive and stable with a rapid response time (i.e. less than 60 s). The detection limit remains consistently low over multiple runs/days. In a 0.1 M KH2PO4 ion buffer, a detection limit of less than 1 × 10-6 M and a linear response range of 10-6–10-3 M were achieved. Furthermore, detection limits of approximately 10-6 M and 10-4 M in 0.1 M K2SO4 and 0.1 M KCl ion buffers, respectively, were demonstrated. In a 0.1 M KH2PO4 ion buffer, there was minimal change in sensor response upon addition of KOH increasing the pH from approximately 4–11. As a control, devices without a PVC membrane coating were tested under identical conditions and exhibited negligible response to nitrate ion exposure. Furthermore, using transistor theory, we show that the apparent gate response is near-Nenrstian under a variety of conditions. The success of this study paves the way for extending this technology to selectively sensing multiple ions in water through incorporation of the appropriate polymer based membranes on arrays of devices.
- Published
- 2013
5. 8.1.5 Nitrate-selective gallium nitride transistor-based ion sensors with low detection limit
- Author
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Myers, M., primary, Podolska, A., additional, Pope, T., additional, Khir, F. M. L., additional, Nener, B. D., additional, Baker, M. V., additional, and Parish, G., additional
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- 2012
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6. Effect of Pb and Cr Substitutions on Phase Formation and Excess Conductivity of Bi-2212 Superconductor
- Author
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Khir, F. L. M., primary, Mohamed, Z., additional, Yusuf, A. A., additional, Yusof, M. I. M., additional, Yahya, A. K., additional, and Alam, Shah, additional
- Published
- 2010
- Full Text
- View/download PDF
7. Optimisation Studies for AlGaN/GaN-based Nitrate Sensor
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Muhammad Khir, F. L., Matthew Myers, Podolska, A., Murray Baker, Brett Nener, and Giacinta Parish
8. Cardiovascular Outcomes and Readmissions of Atrial Fibrillation Among Patent Foramen Ovale Occluder Device Recipients: A Propensity Matched National Readmission Study.
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Taha A, Ali S, Atti L, Duhan S, Elseidy S, Khir F, Keisham B, Aziz S, Spaseski M, Erdem S, ElJack A, Almas T, Uppal D, Ali S, and Alraies MC
- Subjects
- Humans, Patient Readmission, Cardiac Catheterization adverse effects, Treatment Outcome, Foramen Ovale, Patent complications, Foramen Ovale, Patent epidemiology, Foramen Ovale, Patent surgery, Atrial Fibrillation complications, Stroke epidemiology, Stroke etiology, Ischemic Stroke complications, Acute Kidney Injury etiology
- Abstract
Patent foramen ovale (PFO) occluder devices are increasingly utilized in minimally invasive procedures used to treat cryptogenic stroke. Data on the impact of Atrial Fibrillation (AF) among PFO occluder device recipients are limited. The Nationwide Readmissions Database was queried between 2016 and 2019 to identify PFO patients with and without AF. The 2 groups were compared using propensity score matching (PSM) and multivariate regression models. The outcomes included in-hospital mortality, acute kidney injury (AKI), Mechanical circulatory support use (MCS), Cardiogenic shock (CS), acute ischemic stroke, bleeding, and other cardiovascular outcomes. Statistical analysis was performed using STATA v. 17. Out of 6508 Weighted hospitalizations for PFO occluder device procedure over the study period, 877 (13.4%) had AF compared to 5631 (86.6%) who did not. On adjusted analysis, PFO with AF group had higher rates of MCS (PSM, 4.5% vs 2.2 %, P value = 0.011) and SCA (PSM, 7.6% vs 4.6 %, P value = 0.015) compared to PFO with no AF. There was no statistically significant difference in the rate of in-hospital mortality (PSM, 5.4% vs 6.4 %, P value = 0.39), CS (PSM, 8.3% vs 5.9 %, P value = 0.075), AKI (PSM, 32.4% vs 32.3 %, P value = 0.96), bleeding (PSM, 2.08% vs 1.3%, P value = 0.235) or the readmission rates among both cohorts. Additionally, AF was associated with higher hospital length of stay (9.5 ± 13.2 vs 8.2 ± 24.3 days, P-value = 0.012) and total cost ($66,513 ± $80,922 vs $52,013±$125,136, 0.025, P-value = 0.025) compared to PFO without AF. AF among PFO occluder device recipients is associated with increased adverse outcomes, including MCS use and SCA, with no difference in mortality and readmission rates among both cohorts. Long-term follow-up needs further studies., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Inc. All rights reserved.)
- Published
- 2024
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9. A Comparative Study of High-intensity Rosuvastatin Versus Atorvastatin Therapy Post-acute Coronary Syndrome Using Real-world Data.
- Author
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Rahhal A, Khir F, Orabi B, Chbib S, Al-Khalaila O, Abdelghani MS, Osman O, Ashour AA, Al-Awad M, Mahfouz A, Awaisu A, Aljundi AH, Alahmad Y, Alyafei S, and Arabi AR
- Subjects
- Aftercare, Atorvastatin adverse effects, Humans, Patient Discharge, Retrospective Studies, Rosuvastatin Calcium adverse effects, Treatment Outcome, Acute Coronary Syndrome diagnosis, Acute Coronary Syndrome drug therapy, Hydroxymethylglutaryl-CoA Reductase Inhibitors therapeutic use
- Abstract
A high-intensity statin is recommended for the secondary prevention of cardiovascular diseases (CVD). However, real-world evidence of the effectiveness of rosuvastatin following acute coronary syndrome (ACS) is scarce. This retrospective cohort study included patients diagnosed with ACS to compare between the 2 high-intensity statin therapies (rosuvastatin vs atorvastatin) in terms of a primary composite outcome of CVD-associated death, non-fatal ACS, and non-fatal stroke at 1 month and 12 months post discharge. The primary effectiveness outcome did not differ between the 2 groups at 1 month (1.3% vs 1%; aHR = 1.64, 95% CI 0.55-4.94, P= 0.379) and at 12 months (4.8% vs 3.5%; aHR = 1.48, 95% CI 0.82-2.67, P= 0.199). Similarly, the 2 groups had comparable safety outcomes. In conclusion, the use of high-intensity rosuvastatin compared to high-intensity atorvastatin therapy in patients with ACS had resulted in comparable cardiovascular effectiveness and safety outcomes., (Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2022
- Full Text
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10. Prevalence and clinical significance of antiphospholipid antibodies in patients with coronavirus disease 2019 admitted to intensive care units: a prospective observational study.
- Author
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Najim M, Rahhal A, Khir F, Aljundi AH, Abu Yousef S, Ibrahim F, Amer A, Mohamed AS, Saleh S, Alfaridi D, Mahfouz A, Alyafei S, Howady F, Khatib M, and Alemadi SA
- Subjects
- Adult, Aged, C-Reactive Protein analysis, Critical Illness, Female, Humans, Intensive Care Units, Logistic Models, Male, Middle Aged, Prevalence, Prospective Studies, Thrombosis etiology, Antibodies, Antiphospholipid blood, COVID-19 complications, SARS-CoV-2
- Abstract
Coronavirus disease 2019 (COVID-19) increases the risk of coagulopathy. Although the presence of antiphospholipid antibodies (aPLs) has been proposed as a possible mechanism of COVID-19-induced coagulopathy, its clinical significance remains uncertain. Therefore, this study aimed to evaluate the prevalence and clinical significance of aPLs among critically ill patients with COVID-19. This prospective observational study included 60 patients with COVID-19 admitted to intensive care units (ICU). The study outcomes included prevalence of aPLs, and a primary composite outcome of all-cause mortality and arterial or venous thrombosis between antiphospholipid-positive and antiphospholipid-negative patients during their ICU stay. Multiple logistic regression was used to assess the influence of aPLs on the primary composite outcome of mortality and thrombosis. A total of 60 critically ill patients were enrolled. Among them, 57 (95%) were men, with a mean age of 52.8 ± 12.2 years, and the majority were from Asia (68%). Twenty-two patients (37%) were found be antiphospholipid-positive; 21 of them were positive for lupus anticoagulant, whereas one patient was positive for anti-β2-glycoprotein IgG/IgM. The composite outcome of mortality and thrombosis during their ICU stay did not differ between antiphospholipid-positive and antiphospholipid-negative patients (4 [18%] vs. 6 [16%], adjusted odds ratio 0.98, 95% confidence interval 0.1-6.7; p value = 0.986). The presence of aPLs does not seem to affect the outcomes of critically ill patients with COVID-19 in terms of all-cause mortality and thrombosis. Therefore, clinicians may not screen critically ill patients with COVID-19 for aPLs unless deemed clinically appropriate.
- Published
- 2021
- Full Text
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11. Neuropsychiatric Lupus: A Challenging Journey of a Patient With Pulmonary Tuberculosis.
- Author
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Chapra AF, Khir F, Alamami A, Salem KM, and Yusof A
- Abstract
Systemic lupus erythematosus (SLE) is a disease that affects multiple systems in the body. Due to its variable manifestations, it can at times pose challenges for physicians to hold SLE as the culprit behind an affected system. This is most true when encountering patients with neuropsychiatric manifestations of SLE. We present a case of a 38-year-old female with known SLE limited to skin involvement and on treatment for active pulmonary tuberculosis (TB), yet otherwise healthy, who presented with acute fever associated with generalized tonic-clonic seizures. She was investigated for meningoencephalitis with a cerebrospinal fluid (CSF) analysis not being fully conclusive and with imaging features suggestive of viral encephalitis. However, despite receiving optimal care for causes of bacterial, viral, and tuberculous meningitis the patient continued to deteriorate and started to develop predominant psychiatric symptoms in the form of confusion and combative behavior requiring pharmacological restraint. Hence a trial of immunosuppressives was given with a presumptive diagnosis of neuropsychiatric lupus with IV methylprednisolone followed by a course of IV cyclophosphamide. However, this treatment proceeded with caution due to the fear of disseminated tuberculosis for which she did not show any sign of in the subsequent weeks. The patient showed modest clinical and radiological improvement and hence the treatment was continued. The case highlights the uncertainty that may precede a diagnosis of neuropsychiatric lupus and the challenges in treating it in patients with active mycobacterial infection., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2021, Chapra et al.)
- Published
- 2021
- Full Text
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12. Medications adherence post-primary percutaneous coronary intervention in acute myocardial infarction: A population-based cohort study.
- Author
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Rahhal A, Mahfouz A, Khir F, Okleh N, Aljundi AH, AlKhalaila O, Hamid Y, Al-Amri M, Al-Yafei SA, Al Suwaidi J, Al-Qahtani A, Arafa S, and Arabi AR
- Subjects
- Age Factors, Aged, Comorbidity, Female, Humans, Male, Middle Aged, Qatar, Retrospective Studies, Risk Factors, Sex Factors, Cardiovascular Agents administration & dosage, Percutaneous Coronary Intervention, Secondary Prevention methods, Assessment of Medication Adherence
- Abstract
What Is Known and Objective: The use of medications for secondary prevention is the cornerstone in the treatment of coronary artery disease (CAD). However, adherence to these medications is still suboptimal worldwide. This retrospective observational study aimed to assess the adherence to post-percutaneous coronary intervention (PCI) medications, along with predictors of non-adherence., Methods: We conducted a retrospective observational cohort study to assess the adherence to post-PCI medications by determining the rate of prescription refills for 12 months after discharge among STEMI patients, as well as predictors of non-adherence. Adherence was assessed by medication availability 80% of the time monitored by the prescription refills rate for 1 year post-discharge., Results and Discussion: A total of 1334 patients who presented with STEMI and underwent primary PCI were included in our retrospective analysis. The majority of patients included were male (96%) with a mean age of 51 ± 10.2 years. The overall adherence rate for all medications was only 28.4%, with an individual adherence rate of 50.5% for aspirin, 49.9% for P
2 Y12 inhibitors, 48.1% for statins, 39.6% for beta-blockers and 42.9% for angiotensin-converting enzyme (ACE) inhibitors/angiotensin II receptor blockers (ARB). Factors that increased the likelihood of non-adherence were prolonged hospital length of stay and getting the medications with charge (aOR = 1.94, 95% CI 1.1-3.3; p-value = 0.017, aOR = 1.87, 95% CI 1.1-3.3; p-value = 0.029, respectively), while having a regular follow-up after discharge and attending the first clinic appointment were significantly associated with decreased likelihood of non-adherence (aOR = 0.01, 95% CI 0.004-0.04; p-value < 0.001, aOR = 0.06, 95% CI 0.03-0.1; p-value < 0.001, respectively)., What Is New and Conclusion: The adherence rate to post-PCI medications among patients with STEMI was relatively low; however, attending the first outpatient clinic appointment and having a regular follow-up reduced the likelihood of non-adherence., (© 2020 John Wiley & Sons Ltd.)- Published
- 2021
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13. Clinical outcomes of high-intensity doses of atorvastatin in patients with acute coronary syndrome: A retrospective cohort study using real-world data.
- Author
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Rahhal A, Khir F, Aljundi AH, AlAhmad Y, Alzaeem H, Habra M, Al-Shekh I, Mahfouz A, Awaisu A, Al-Yafei S, and Arabi AR
- Subjects
- Aftercare, Atorvastatin adverse effects, Humans, Male, Middle Aged, Patient Discharge, Retrospective Studies, Acute Coronary Syndrome drug therapy
- Abstract
Aims: To compare the effectiveness and safety of 2 high-intensity atorvastatin doses (40 mg vs 80 mg) among acute coronary syndrome (ACS) patients., Methods: This retrospective observational cohort study using real-world data included patients admitted with ACS to the Heart Hospital in Qatar between 1 January 2017 and 31 December 2018. The primary endpoint was a composite of cardiovascular disease-associated death, nonfatal ACS and nonfatal stroke. Cox proportional hazard regression analysis was used to determine the association between the 2 high-intensity atorvastatin dosing regimens and the primary outcome at 1 month and 12 months postdischarge., Results: Of the 626 patients included in the analyses, 475 (75.9%) received atorvastatin 40 mg, while 151 (24.1%) received atorvastatin 80 mg following ACS. Most of the patients were Asian (73%), male (97%) with a mean age of 50 years and presented with ST-elevation myocardial infarction (60%). The incidence of the primary effectiveness outcome did not differ between the atorvastatin 40-and 80-mg groups at 1 month (0.8 vs 1.3%; adjusted hazard ratio = 0.59, 95% confidence interval 0.04-8.13, P = .690) and at 12 months (3.2 vs 4%; adjusted hazard ratio = 0.57, 95% confidence interval 0.18-1.80, P = .340). Similarly, the use of the 2 doses of atorvastatin resulted in comparable safety outcomes, including liver toxicity, myopathy and rhabdomyolysis with an event rate of <1% in both groups., Conclusion: The use of atorvastatin 40 mg in comparison to atorvastatin 80 mg in patients with ACS resulted in similar cardiovascular effectiveness and safety outcomes., (© 2020 British Pharmacological Society.)
- Published
- 2021
- Full Text
- View/download PDF
14. Low dose combined oral contraceptives induced thrombotic anterior wall myocardial infarction: a case report.
- Author
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Rahhal A, Khir F, Adam M, Aljundi A, Mohsen MK, and Al-Suwaidi J
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- Adult, Anterior Wall Myocardial Infarction diagnostic imaging, Anterior Wall Myocardial Infarction drug therapy, Anticoagulants therapeutic use, Contraceptives, Oral, Combined administration & dosage, Contraceptives, Oral, Hormonal administration & dosage, Contraceptives, Oral, Synthetic administration & dosage, Desogestrel administration & dosage, Enoxaparin therapeutic use, Female, Humans, Risk Factors, Thrombosis diagnostic imaging, Thrombosis drug therapy, Treatment Outcome, Anterior Wall Myocardial Infarction chemically induced, Contraceptives, Oral, Combined adverse effects, Contraceptives, Oral, Hormonal adverse effects, Contraceptives, Oral, Synthetic adverse effects, Desogestrel adverse effects, Thrombosis chemically induced
- Abstract
Background: Combined oral contraceptive pills are associated with an established risk for venous thrombosis; however, their risk for arterial thrombosis remains uncertain, especially with the development of low dose new generations of combined oral contraceptive. Arterial thrombosis is less likely to occur with the use of oral contraceptive pills in the absence of cardiovascular risk factors., Case Presentation: We report a 35-year old female with no cardiovascular risk factors who presented with thrombotic anterior wall myocardial infarction 6 months after using a third generation low dose combined oral contraceptive pills (Marvelon; ethinylestradiol 30 mcg and desogestrel 150 mcg)., Conclusion: Third generation low dose combined oral contraceptives may lead to myocardial infarction in young women, even in the absence of other cardiovascular risk factors.
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- 2020
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15. [Emergence of glycopeptide resistant Enterococcus faecium in Algeria: a case report].
- Author
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Hamidi M, Ammari H, Ghaffor M, Benamrouche N, Tali-Maamar H, Tala-Khir F, Younsi M, and Rahal K
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- Algeria, Anti-Bacterial Agents therapeutic use, Communicable Diseases, Emerging microbiology, Enterococcus faecium drug effects, Enterococcus faecium physiology, Gram-Positive Bacterial Infections microbiology, Humans, Male, Microbial Sensitivity Tests, Young Adult, Communicable Diseases, Emerging diagnosis, Drug Resistance, Bacterial, Enterococcus faecium isolation & purification, Glycopeptides therapeutic use, Gram-Positive Bacterial Infections diagnosis
- Abstract
A glycopeptide-resistant Enterococcus faecium (EFRG) was isolated from a wound in a patient hospitalized in a university hospital in Algiers. This strain was resistant to several antibiotics. This patient was carrying this strain in the digestive tract which may partly explain its origin. Genotypic comparison of the two strains by pulsed field gel electrophoresis showed that it was the same strain. Glycopeptide resistance was due to the presence of the vanA gene. Vigilance is required facing the emergence of strains of EFRG in our hospitals.
- Published
- 2013
- Full Text
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