Publications by authors named "Khaled A Shams"

Article Synopsis
  • The study focused on elderly patients (70+) undergoing primary percutaneous coronary intervention (pPCI) for ST-elevation myocardial infarction (STEMI) at a tertiary center in Upper Egypt, highlighting a growing concern for cardiovascular disease in aging populations.
  • The research included data from 3,627 patients, finding that 15.9% were elderly, with significantly higher in-hospital mortality rates, particularly among octogenarians (23.3%) compared to younger patients (4%).
  • Elderly patients showed distinct clinical characteristics, such as higher rates of hypertension and chronic kidney disease, and were more likely to have severe complications post-procedure, emphasizing the need for tailored strategies in managing this demographic in cardiovascular care.
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Late coronary complications after an arterial switch operation (ASO) may occur due to vessel kinking, compression resulting from growth of the great vessels, ostial fibro-intimal thickening after reimplantation or possibly secondary to accelerated atherosclerosis. Given that many of these patients are asymptomatic, adult ASO survivors require special attention and an individualised approach to the early detection of coronary artery disease. Most previously reported cases of coronary artery disease after an ASO have been managed surgically.

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Background: Children with ventricular septal defect (VSD) and large systemic-to-pulmonary shunts eventually develop pulmonary hypertension (PH). The perioperative management of patients with VSD and PH is quite troublesome and still debatable, especially in developing countries where the different management options and standardization of treatment is not available. Oral phosphodiesterase type 5 (PDE-5) inhibitors are good treatment options being widely available, cheap, easy administration and do not require extensive monitoring.

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Background: Casuarina equisetifolia belongs to the Casuarina species with the most extensive natural distribution, which contain various phytochemicals with potential health benefits. This study aimed to investigate the chemical composition and biological activities of different extracts of Casuarina equisetifolia.

Methods: The n-hexane extract was analyzed for its unsaponifiable and fatty acid methyl esters fractions, while chloroform, ethyl acetate, and butanol extracts were studied for their phenolic components.

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is a genus compromising over 250 herbaceous flowering species and is used traditionally to treat several ailments. Among the Egyptian species, was reported to be cytotoxic against multidrug-resistant cancer cells. In this context, we aimed to explore the metabolome of and compare it to other members of the genus in pursuance of identifying its bioactive principles.

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Aim: To assess knowledge and practices of some Egyptian pediatric dentists and pediatric cardiologists/cardiac surgeons regarding prevention of infective endocarditis (IE) from oral origin in children.

Materials And Methods: Pediatric dentists or pediatric cardiologists/cardiac surgeons having their practice in Egypt were conveniently selected. An online questionnaire was constructed for each specialty practitioner in English using a web-based platform.

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Background: In the pharmaceutical sector, tissue culture techniques for large-scale production of natural chemicals can be a less expensive alternative to large-scale synthesis. Although recent biotransformation research have used plant cell cultures to target a wide range of bioactive compounds, more compiled information and synopses are needed to better understand metabolic pathways and improve biotransformation efficiencies.

Purpose: This report reviews the biochemical transformation of phenolic natural products by plant cell cultures in order to identify potential novel biotechnological approaches for ensuring more homogeneous and stable phenolic production year-round under controlled environmental conditions.

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The genus is recognized in folk medicine for anti-inflammatory, anti-itch, antitussive, purgative, astringent, and tonic activities. To study the chemical determinant for antimicrobial activity essential oils (EOs), five species were analyzed including: , , , and . Conventional hydro-distillation (HD) and microwave-assisted extraction (MAE), as new green technologies, were compared for the extraction of essential oils.

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Background: Congenital left atrium (LA) aneurysms are extremely rare entities in clinical practice and most frequently involve the atrial appendage and rarely arise from the body of LA, We report a case of giant LA aneurysm compressing heart and presenting in a very late stage.

Case Summary: A 31-year-old male, who was diagnosed to have dextrocardia, rheumatic heart disease, and atrial fibrillation and was kept on medical treatment long time ago, presented with congestive heart failure symptoms and cardiogenic shock. Emergency transthoracic echocardiography was done revealing situs solitus with aneurysmally dilated LA pushing heart to the right side (dextro-posed heart), moderate mitral regurgitation, and severe pulmonary hypertension, however, pulmonary artery anatomy could not be properly visualized so computed tomography (CT) was preformed confirming diagnosis and revealing compressed pulmonary arterial tree by the dilated LA, unfortunately patient died before proceeding to surgical intervention.

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Structurally diverse natural products are valued for their targeted biological activity. The challenge of working with such metabolites is their low natural abundance and complex structure, often with multiple stereocenters, precludes large-scale or unsophisticated chemical synthesis. Since select plants contain the enzymatic machinery necessary to produce specialized compounds, tissue cultures can be used to achieve key transformations for large-scale chemical and/or pharmaceutical applications.

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is widely used in traditional medicines for the treatment of several diseases. From the aerial parts organic extract of , two new compounds, 1,3,8-trihydroxyeudesm-4-en-7,11H-12,6-olide () and 5--​-​glucopyranosyloxy​-​7-methoxy-​6H-​benzopyran-​2-​one (), respectively, together with five known metabolites: 3,8-dihydroxygermacr-4(15),9(10)-dien-7,11H,12,6-olide (), 1,8-dihydroxy-11,13-dihydrobalchanin (), 11-epiartapshin (), tomenin () and benzoic acid, -​(-​-​glucopyranosyloxy)​-​methyl ester (), were isolated and identified. The chemical structures were proven depending upon spectroscopic analysis, including 1 D/2D NMR as and ESI-MS.

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Background: The multidrug resistance (MDR) phenotype encounters a major challenge to the success of established chemotherapy in cancer patients. We hypothesized that cytotoxic medicinal plants with novel phytochemicals can overcome MDR and kill MDR-cells with similar efficacy as drug sensitive cells.

Purpose: We evaluated plant extracts from an unexplored ecosystem in Egypt with unusual climate and nutrient conditions for their activity against sensitive and multidrug-resistant cancer cell lines.

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Aim: To assess the effect of balloon mitral valvuloplasty (BMV) on global and regional ventricular functions using 2D strain.

Methods And Results: Thirty-two patients with mitral stenosis (MS) and 30 healthy subjects underwent full echocardiographic examinations, including left ventricle (LV) and right ventricle (RV) regional and global longitudinal strain (GLS) measurements. In MS patients, measurements were repeated within 24 h and 3 months after BMV.

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Background: Hydrodistillation (HD) and steam-distillation, or solvent extraction methods of essential oils have some disadvantages like thermal decomposition of extracts, its contamination with solvent or solvent residues and the pollution of residual vegetal material with solvent which can be also an environmental problem. Thus, new green techniques, such as supercritical fluid extraction and microwave assisted techniques, are potential solutions to overcome these disadvantages.

Materials And Methods: The aim of this study was to evaluate the essential oil of Foeniculum vulgare subsp.

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Rumex dentatus L. and Rumex vesicarius L., of the family Polygonaceae, are edible herbs growing wild in Egypt.

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Vinblastine and vincristine (the antileukemic agents) were isolated, in a pure form, from Catharanthus roseus L. Don., cultivated in Egypt, by several chromatographic techniques.

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The lipid fraction constituents as well as evaluation of anti-anaphylactic activity of Prunus mahaleb L. kernels were studied. Prunus mahaleb L.

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The roots of Alkanna orientalis (L.) Boiss yielded alpha-methyl-n-butyl alkannin (compound 1) and alkannin acetate (compound 2). The compounds were identified by UV, MS, (1)H NMR and (13)C NMR.

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