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https://www.readbyqxmd.com/read/29229895/prevalence-and-predictors-of-myocardial-ischemia-by-preoperative-myocardial-perfusion-single-photon-emission-computedtomography-in-patients-undergoing-noncardiac-surgery
#1
Abdelkareem Saleh Al-Oweidi, Hesham Albabtain, Suleiman M Kharabsheh, Peter Kimme, Mahmoud Almustafa, Samer Seder, Mohamed Shoukri, Ahmed L Fathala
BACKGROUND: The prevalence and predictors of myocardial ischemia before noncardiac surgery are unknown. In addition the predictive value of myocardial perfusion single-photon emission computed tomography (SPECT) before noncardiac in individual patients is uncertain. OBJECTIVE: Evaluate the prevalence and predictors of myocardial ischemia before noncardiac surgery, and determine the postoperative cardiac outcome based on results of myocardial perfusion SPECT. DESIGN: Retrospective...
November 2017: Annals of Saudi Medicine
https://www.readbyqxmd.com/read/29228310/concomitant-atrial-fibrillation-surgery-worth-the-effort
#2
Samer A M Nashef, Yasir Abu-Omar
Concomitant surgery for atrial fibrillation is a conceptually and clinically difficult area of cardiac surgical decision making. This review introduces the pathophysiological background, provides insight and guidance for cardiac surgeons on some of the conflicting evidence and claims, and explores the fields in which further research may help elucidate a cardiac surgical clinical strategy for tackling this common and potentially lethal form of arrhythmia.
December 8, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29226914/longitudinal-deformation-bench-testing-using-a-coronary-artery-model-a-new-standard
#3
COMMENT
Tawfiq R Choudhury, Salwan Al-Saigh, Steve Burley, Lin Li, Nizar Shakhshir, Nazanin Mirhosseini, Tao Wang, Samer Arnous, Muhammad A Khan, Mamas A Mamas, Douglas G W Fraser
Objectives: To compare susceptibility of five different stent platforms with longitudinal stent deformation (LSD) using a clinically relevant bench testing model simulating both short and long malapposed lengths. Background: Recent data suggest that design modifications to the Promus Element stent which led to the Promus Premier stent has reduced susceptibility to LSD. However, susceptibility to LSD at long malapposed lengths has not been tested. Furthermore, the mechanisms behind susceptibility to LSD are as yet unclear...
2017: Open Heart
https://www.readbyqxmd.com/read/29223452/antimicrobial-activity-of-bulbothrix-setschwanensis-zahlbr-hale-lichen-by-cell-wall-disruption-of-staphylococcus-aureus-and-cryptococcus-neoformans
#4
Indresh K Maurya, Samer Singh, Rupinder Tewari, Manish Tripathi, Shashi Upadhyay, Yogesh Joshi
In the present study, antimicrobial activity of a common Himalayan lichen viz. Bulbothrix setschwanensis (Zahlbr.) Hale extract in three common solvents (acetone, chloroform and methanol) was evaluated against six bacterial and seven fungal clinical strains. The acetone extract showed promising antimicrobial activity against S. aureus (1.56 mg/mL) and C. neoformans (6.25 mg/mL). Further, GC-MS analysis revealed 2,3-bis(2-methylpentanoyloxy)propyl 2-methylpentanoate and Ethyl 2-[(2R,3R,4aR,8aS)-3-hydroxy-2,3,4,4a,6,7,8,8a-octahydropyrano [3,2-b]pyran-2-yl]acetate as the predominant compounds...
December 6, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29218836/model-based-evaluation-of-radiation-and-radiosensitizing-agents-in-oncology
#5
Tim Cardilin, Joachim Almquist, Mats Jirstrand, Astrid Zimmermann, Samer El Bawab, Johan Gabrielsson
Radiation therapy is one of the major therapy form in oncology, and combination therapies involving radiation and chemical compounds can yield highly effective tumor eradication. In this paper, we develop a tumor growth inhibition model for combination therapy with radiation and radiosensitizing agents. Moreover, we extend previous analyses of drug combinations by introducing the Tumor Static Exposure (TSE) curve. The TSE curve for radiation and radiosensitizer visualizes exposure combinations sufficient for tumor regression...
December 8, 2017: CPT: Pharmacometrics & Systems Pharmacology
https://www.readbyqxmd.com/read/29218003/eye-drops-for-activation-of-dreadds
#6
William T Keenan, Diego C Fernandez, Lukas J Shumway, Haiqing Zhao, Samer Hattar
Designer Receptors Exclusively Activated by Designer Drugs (DREADDs) are an important tool for modulating and understanding neural circuits. Depending on the DREADD system used, DREADD-targeted neurons can be activated or repressed in vivo following a dose of the DREADD agonist clozapine-N-oxide (CNO). Because DREADD experiments often involve behavioral assays, the method of CNO delivery is important. Currently, the most common delivery method is intraperitoneal (IP) injection. IP injection is both a fast and reliable technique, but it is painful and stressful particularly when many injections are required...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/29212867/dysphagia-lusoria-presenting-as-epigastric-pain
#7
Hoda Daher, Samer Al Hadidi
No abstract text is available yet for this article.
December 5, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29207361/patient-factors-but-not-the-use-of-novel-anticoagulants-or-warfarin-are-associated-with-internal-jugular-vein-access-site-hematoma-after-right-heart-catheterization
#8
Osama Dasa, Qaiser Shafiq, Mohammed Ruzieh, Luai Alhazmi, Maen Al-Dabbas, Zaid Ammari, Samer Khouri, George Moukarbel
INTRODUCTION: Right heart catheterization (RHC) is routinely performed to assess hemodynamics. Generally, anticoagulants are held prior to the procedure. At our center, anticoagulants are continued and ultrasound guidance is always used for internal jugular vein access. A micropuncture access kit is used to place a 5 or 6 Fr sheath using the modified Seldinger technique. Manual compression is applied for 10-15 min and the patient is observed for at least 2 hours after the procedure. In a retrospective analysis, we investigated the risk of bleeding complications associated with RHC via the internal jugular vein in patients with and without full anticoagulation...
December 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/29204205/a-giant-occipital-encephalocele-in-neonate-with-spontaneous-hemorrhage-into-the-encephalocele-sac-surgical-management
#9
Guru Dutta Satyarthee, Luis Rafael Moscote-Salazar, Nidia Escobar-Hernandez, Jose Aquino-Matus, Paulo Cesar Puac-Polanco, Samer S Hoz, Willem Guillermo Calderon-Miranda
The presence of giant occipital encephalocele represents a surgical challenge. However, preoperative magnetic resonance imaging with venography can help in delineating relation of venous sinus, content of the sac and help classify occipital encephalocele into infra-torcular and torcular depending on the relation with position of torcula. However, the presence of old hemorrhage into encephalocele sac is extremely rare and in the detailed PubMed search, the authors could find one such case, reported by Nath et al...
July 2017: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/29201484/intracranial-myeloid-sarcoma-metastasis-mimicking-acute-subdural-hematoma
#10
Amandip S Gill, Rabina Gill, Paul Kaloostian, Dina Elias, John S Roufail, Aurora S Cruz, Panayiotis E Pelargos, Frank P K Hsu, Ronald C Kim, Robert E Ayer, Samer Ghostine
Myeloid sarcoma, a rare consequence of myeloproliferative disorders, is rarely seen in the central nervous system, most commonly in the pediatric population. Although there are a handful of case reports detailing initial presentation of CNS myeloid sarcoma in the adult population, we have been unable to find any reports of CNS myeloid sarcoma presenting as a large mass lesion in a herniating patient. Here, we present the case of a patient transferred to our facility for a very large subdural hematoma. Based on imaging characteristics, it was felt to be a spontaneous hematoma secondary to coagulopathy...
2017: Case Reports in Surgery
https://www.readbyqxmd.com/read/29198986/australian-trends-in-procedural-characteristics-and-outcomes-in-patients-undergoing-percutaneous-coronary-intervention-for-st-elevation-myocardial-infarction
#11
Sinjini Biswas, Stephen J Duffy, Jeffrey Lefkovits, Nick Andrianopoulos, Angela Brennan, Antony Walton, William Chan, Samer Noaman, James A Shaw, Luke Dawson, Andrew Ajani, David J Clark, Melanie Freeman, Chin Hiew, Ernesto Oqueli, Christopher M Reid, Dion Stub
Over the last decade, systems of care for ST-elevation myocardial infarction (STEMI) have evolved to try to improve outcomes and timely access to percutaneous coronary intervention (PCI). There have also been advances in PCI techniques and adjunctive pharmacotherapies. In this study, we sought to determine temporal changes in practices and clinical outcomes of PCI in patients with STEMI. We prospectively collected data on 8,412 consecutive patients undergoing PCI for STEMI between 2005 and 2016 in the multicenter Melbourne Interventional Group registry...
October 31, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29182762/cognitive-function-among-antiretroviral-treatment-na%C3%A3-ve-individuals-infected-with-hiv-1-subtype-g-versus-crf02_ag-in-nigeria
#12
Jibreel Jumare, Nicaise Ndembi, Samer S El-Kamary, Laurence Magder, Laura Hungerford, Tricia Burdo, Lindsay M Eyzaguirre, Patrick Dakum, Anya Umlauf, Mariana Cherner, Alash'le Abimiku, Man Charurat, William A Blattner, Walter Royal
Background: HIV-1 subtype has been shown to be associated with disease progression. We compared cognitive function between individuals infected with HIV-1 subtype G and CRF02_AG in Nigeria. Methods: For this cross-sectional study, samples were analyzed from 146 antiretroviral naïve participants. Genotypic analysis of plasma HIV RNA was performed by nested PCR of protease and reverse transcriptase genes, and sequences aligned with curated HIV-1 subtype references...
November 22, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29176450/corneal-cross-linking-with-verteporfin-and-nonthermal-laser-therapy
#13
Saleh A Alageel, Samer N Arafat, Borja Salvador-Culla, Paraskevi E Kolovou, Khadijeh Jahanseir, Adam Kozak, Gavin J C Braithwaite, Joseph B Ciolino
PURPOSE: To test whether verteporfin with a nonthermal laser increases corneal mechanical stiffness and resistance to enzymatic degradation ex vivo. METHODS: Thirty human corneas (n = 5 per group) were treated with verteporfin alone (V), irradiated with nonthermal laser therapy (689 nm) alone (NTL), or received combined treatment of verteporfin with nonthermal laser therapy for 1 sequence (V+NTL1) or 6 sequences (V+NTL6) of 1 minute of NTL exposure. Positive controls were pretreated with 0...
November 22, 2017: Cornea
https://www.readbyqxmd.com/read/29176310/urinary-disorders-and-marfan-syndrome-a-series-of-4-cases
#14
Claire Hentzen, Nicolas Turmel, Camille Chesnel, Frederique Le Breton, Samer Sheikh Ismael, Gérard Amarenco
Marfan syndrome is a genetic disease responsible for causing cardiovascular, eye and musculoskeletal damages. Urinary disorders are not common. We present 4 cases of chronic urinary tract symptoms, with 2 different pathophysiological processes. Three patients presented with spinal cord infarct following aortic dissection surgery. They were affected by an overactive bladder with detrusor overactivity and detrusor-sphincter dyssynergia. One patient complained of voiding dysfunction, possibly related to dural ectasia...
November 24, 2017: Urologia Internationalis
https://www.readbyqxmd.com/read/29175139/in-vitro-in-vivo-correlations-for-nicotine-transdermal-delivery-systems-evaluated-by-both-in-vitro-skin-permeation-ivpt-and-in-vivo-serum-pharmacokinetics-under-the-influence-of-transient-heat-application
#15
Soo Hyeon Shin, Sherin Thomas, Sam G Raney, Priyanka Ghosh, Dana C Hammell, Samer S El-Kamary, Wilbur H Chen, M Melissa Billington, Hazem E Hassan, Audra L Stinchcomb
The in vitro permeation test (IVPT) has been widely used to characterize the bioavailability (BA) of compounds applied on the skin. In this study, we performed IVPT studies using excised human skin (in vitro) and harmonized in vivo human serum pharmacokinetic (PK) studies to evaluate the potential in vitro-in vivo correlation (IVIVC) of nicotine BA from two, matrix-type, nicotine transdermal delivery systems (TDS). The study designs used for both in vitro and in vivo studies included 1h of transient heat (42±2°C) application during early or late time periods post-dosing...
November 21, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29174078/acute-pancreatitis-admission-trends-a-national-estimate-through-the-kids-inpatient-database
#16
Maisam Abu-El-Haija, Samer El-Dika, Alice Hinton, Darwin L Conwell
OBJECTIVES: To evaluate national health care use and costs for pediatric acute pancreatitis. STUDY DESIGN: The Kids' Inpatient Database for 2006, 2009, and 2012 was queried for patients with a principal diagnosis of acute pancreatitis. Cases were grouped by age: preschool (<5 years of age), school age (5-14 years of age), and adolescents (>14 years of age). RESULTS: A total of 27 983 discharges for acute pancreatitis were found. The number of admissions increased with age: young n = 1279, middle n = 8012, and older n = 18 692...
November 21, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/29173601/autologous-bone-marrow-stem-cell-therapy-in-patients-with-st-elevation-myocardial-infarction-a-systematic-review-and-meta-analysis
#17
REVIEW
Maya M Jeyaraman, Rasheda Rabbani, Leslie Copstein, Wasan Sulaiman, Farnaz Farshidfar, Hessam H Kashani, Sheikh M Z Qadar, Qingdong Guan, Becky Skidmore, Elissavet Kardami, John Ducas, Samer Mansour, Ryan Zarychanski, Ahmed M Abou-Setta
BACKGROUND: Randomized controlled trials (RCTs) on bone marrow stem cell (BMSC) therapy in ST-elevation myocardial infarction (STEMI) patients have reported conflicting results. Our main objective was to critically appraise and meta-analyze best-available evidence on efficacy and safety of intracoronary administration of autologous BMSC therapy in STEMI patients after primary percutaneous coronary intervention. METHODS: We conducted a search of MEDLINE, PubMed, EMBASE, CENTRAL, Global Health, CINAHL, and conference proceedings in February 2017...
December 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/29166306/the-surgical-management-of-nerve-gaps-present-and-future
#18
Samer Bassilios Habre, Grant Bond, Xi Lin Jing, Epameinondas Kostopoulos, Robert D Wallace, Petros Konofaos
Peripheral nerve injuries can result in significant morbidity, including motor and/or sensory loss, which can affect significantly the life of the patient. Nowadays, the gold standard for the treatment of nerve section is end-to-end neurorrhaphy. Unfortunately, in some cases, there is segmental loss of the nerve trunk. Nerve mobilization allows primary repair of the sectioned nerve by end-to-end neurorrhaphy if the gap is less than 1 cm. When the nerve gap exceeds 1 cm, autologous nerve grafting is the gold standard of treatment...
November 21, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29163736/association-of-glycosylated-hemoglobin-levels-with-vitamin-d-status
#19
Badurudeen Mahmood Buhary, Ohoud Almohareb, Naji Aljohani, Saleh Alrajhi, Samer Elkaissi, Suphia Sherbeeni, Abdulrahman Almaghamsi, Shawana Abdulhamid Khan, Mussa H Almalki
Background: The discovery of vitamin D is one of medicine's great achievements. Despite all the positive evidence emerging about the beneficial effect of vitamin D, we still find many are vitamin D deficient. The purposes of this study were to examine the association between serum 25-hydroxyvitamin D (25(OH)D) and glycosylated hemoglobin (HbA1c) levels, to test the hypothesis that lower 25(OH)D levels are associated with poorer glucose control in diabetes mellitus (DM) patients and to investigate the effect of vitamin D supplementation on HbA1c levels...
December 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/29158062/effect-of-change-in-fluid-status-evaluated-by-bioimpedance-techniques-on-body-composition-in-hemodialysis-patients
#20
Samer R Abbas, Stephan Thijssen, Erik L Penne, Jochen G Raimann, Li Liu, Murat H Sipahioglu, Eric Seibert, Yuedong Wang, Yuqi Chen, Qingqing Xiao, Nathan W Levin, Peter Kotanko, Fansan Zhu
OBJECTIVE: This prospective study uses calf bioimpedance spectroscopy (cBIS) to guide the attainment of dry weight (DWcBIS) in chronic hemodialysis (HD) patients. The primary aim of this study was to evaluate whether body composition is altered when fluid status is reduced to DWcBIS. METHODS: Target post-HD weight was gradually reduced from baseline (BL) until DWcBIS was achieved. DWcBIS was defined as the presence of both flattening of the curve of extracellular resistance and the attainment calf normalized resistivity in the normal range during the dialysis treatment...
November 18, 2017: Journal of Renal Nutrition
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