420 results on '"Ibrahim, Md"'
Search Results
2. Dual Threats in RIS-Aided RF-UOWC Mixed Networks: Secrecy Performance Analysis under Simultaneous RF and UOWC Eavesdropping
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Rakib, Md. Abdur, Ibrahim, Md., Badrudduza, A. S. M., and Ansari, Imran Shafique
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Computer Science - Information Theory - Abstract
In the dynamic realm of 6G technology, emphasizing security is essential, particularly for optimizing high-performance communication. A notable strategy involves the use of reconfigurable intelligent surfaces (RISs), an emerging and cost-efficient technology aimed at fortifying incoming signals, broadening coverage, and ultimately improving the overall performance of systems. In this paper, we introduce a comprehensive framework to analyze the secrecy performance of an RIS-assisted mixed radio frequency (RF) - underwater optical wireless communication (UOWC) network. Here, all the RF links undergo alpha-mu fading distribution, whereas the UOWC links experience a mixture of Exponential Generalized Gamma distribution. Specifically, we examine three potential eavesdropping situations: 1) eavesdropping on the RF link, 2) eavesdropping on the UOWC link, and 3) a simultaneous eavesdropping attack affecting both RF and UOWC links. To achieve this, we derive novel mathematical expressions such as average secrecy capacity, secrecy outage probability, strictly positive secrecy capacity, and effective secrecy throughput in closed form. Using these derived expressions, we carry out an investigation to assess the influences of fading parameters, pointing errors, receiver detection technique, underwater turbulence severity, and water salinity on the system. Furthermore, our study investigates the significance of RIS in improving secrecy performance due to the proposed model. To provide deeper insights, we also perform asymptotic analysis for the high signal-to-noise region. Finally, to verify our analytical results, we conduct Monte Carlo simulation using a computer-based technique.
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- 2024
3. RIS-Aided Free-Space Optics Communications in A2G Networks over Inverted Gamma-Gamma Turbulent Channels
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Rakib, Md. Abdur, Ibrahim, Md., Badrudduza, A. S. M., Ansari, Imran Shafique, Zaman, Md. Shahid Uz, and Yu, Heejung
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Computer Science - Information Theory ,Electrical Engineering and Systems Science - Signal Processing - Abstract
With the advent of sixth-generation networks, reconfigurable intelligent surfaces (RISs) have revolutionized wireless communications through dynamic electromagnetic wave manipulation, thereby facilitating the adaptability and unparalleled control of real-time performance evaluations. This study proposed a framework to analyze the performance of RIS-assisted free-space optics (FSO) communication over doubly inverted Gamma-Gamma (IGGG) distributions with pointing error impairments. Furthermore, a special scenario addressing secure communication in the potential presence of an eavesdropper. Consequently, we derived closed-form expressions for the outage probability, average bit error rate, average channel capacity, average secrecy capacity, and secrecy outage probability by employing an asymptotic analysis to provide deeper insights into the influence of various system parameters. Finally, we verified our analytical results through appropriate numerical simulations.
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- 2024
4. Secrecy Performance Analysis of Integrated RF-UWOC IoT Networks Enabled by UAV and Underwater-RIS
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Sarawar, Abrar Bin, Badrudduza, A. S. M., Ibrahim, Md., Ansari, Imran Shafique, and Yu, Heejung
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Computer Science - Information Theory ,Electrical Engineering and Systems Science - Signal Processing - Abstract
In the sixth-generation (6G) Internet of Things (IoT) networks, the use of UAV-mounted base stations and reconfigurable intelligent surfaces (RIS) has been considered to enhance coverage, flexibility, and security in non-terrestrial networks (NTNs). In addition to aerial networks enabled by NTN technologies, the integration of underwater networks with 6G IoT can be considered one of the most innovative challenges in future IoT. Along with such trends in IoT, this study investigates the secrecy performance of IoT networks that integrate radio frequency (RF) UAV-based NTNs and underwater optical wireless communication (UOWC) links with an RIS. Considering three potential eavesdropping scenarios (RF signal, UOWC signal, and both), we derive closed-form expressions for secrecy performance metrics, including average secrecy capacity, secrecy outage probability, probability of strictly positive secrecy capacity, and effective secrecy throughput. Extensive numerical analyses and Monte Carlo simulations elucidate the impact of system parameters such as fading severity, the number of RIS reflecting elements, underwater turbulence, pointing errors, and detection techniques on system security. The findings offer comprehensive design guidelines for developing such a network aiming to enhance secrecy performance and ensure secure communication in diverse and challenging environments.
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- 2024
5. The Challenges of Aortic Valve Management After Left Ventricular Assist Device Implantation
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Fotios Pitoulis, MD, PhD, Karissa Tauber, MD, Pavan Atluri, MD, Wilson Szeto, MD, Saif Anwarruddin, MD, Taisei Kobayashi, MD, Nimesh Desai, MD, Marisa Cevasco, MD, Christian Bermudez, MD, Michael Acker, MD, Matthew Williams, MD, and Michael Ibrahim, MD, PhD
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Surgery ,RD1-811 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background: Continuous retrograde flow across the aortic valve from left ventricular assist device (LVAD) therapy can result in cusp damage and progressive aortic regurgitation, potentially triggering recurrent heart and multiorgan failure. The management of aortic regurgitation after LVAD implantation has not been well defined. Methods: This study retrospectively reviewed the investigators’ experience with the management of de novo aortic regurgitation requiring intervention in patients with continuous-flow LVAD. Results: Six patients who had undergone LVAD implantation and who required intervention were identified. Two patients underwent redo sternotomy with bioprosthetic aortic valve replacement, and 4 patients underwent percutaneous management, including Amplatzer device (Abbott) placement and transcatheter aortic valve replacement. All patients had resolution of aortic regurgitation with improved hemodynamics and relief from heart failure. One early and 2 late deaths occurred. Valve function was intact, with all valves opening intermittently without greater than trivial aortic regurgitation. Conclusions: Multiple treatment modalities exist for LVAD-induced aortic valve regurgitation, including open surgical and percutaneous strategies. With a tailored risk-adjusted approach, acceptable results may be achieved.
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- 2024
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6. RIS-aided Mixed RF-FSO Wireless Networks: Secrecy Performance Analysis with Simultaneous Eavesdropping
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Rahman, Md. Mijanur, Badrudduza, A. S. M., Sarker, Noor Ahmad, Ibrahim, Md., and Ansari, Imran Shafique
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Computer Science - Information Theory ,Electrical Engineering and Systems Science - Signal Processing - Abstract
The appearance of sixth-generation networks has resulted in the proposal of several solutions to tackle signal loss. One of these solutions is the utilization of reconfigurable intelligent surfaces (RIS), which can reflect or refract signals as required. This integration offers significant potential to improve the coverage area from the sender to the receiver. In this paper, we present a comprehensive framework for analyzing the secrecy performance of a RIS-aided mixed radio frequency (RF)-free space optics (FSO) system, for the first time. Our study assumes that a secure message is transmitted from a RF transmitter to a FSO receiver through an intermediate relay. The RF link experiences Rician fading while the FSO link experiences M\'alaga distributed turbulence with pointing errors. We examine three scenarios: 1) RF-link eavesdropping, 2) FSO-link eavesdropping, and 3) a simultaneous eavesdropping attack on both RF and FSO links. We evaluate the secrecy performance using analytical expressions to compute secrecy metrics such as the average secrecy capacity, secrecy outage probability, strictly positive secrecy capacity, effective secrecy throughput, and intercept probability. Our results are confirmed via Monte-Carlo simulations and demonstrate that fading parameters, atmospheric turbulence conditions, pointing errors, and detection techniques play a crucial role in enhancing secrecy performance., Comment: No comments
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- 2023
7. Effects of Co-channel Interference on RIS Empowered Wireless Networks amid Multiple Eavesdropping Attempts
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Ruku, Md. Roisul Ajom, Ibrahim, Md., Badrudduza, A. S. M., and Ansari, Imran Shafique
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Computer Science - Information Theory - Abstract
This letter is concerned with the secrecy performance of reconfigurable intelligent surfaces (RIS)-aided wireless networks in the existence of multiple interferers towards the destination. To be more precise, we analyze three critical issues in the design of secure RIS-assisted networks: 1) How do interferers affect the performance of secure wireless networks? 2) Which of the two groups of eavesdroppers (i.e., colluding and non-colluding) is more severe? 3) How can RIS improve network confidentiality? To do so, we develop the analytical expression of secrecy outage probability in closed-form, along with asymptotic analysis at high signal-to-noise ratio regime to better understand the impacts of different system parameters on secrecy performance. Finally, we validate our analytical results using a computer based Monte-Carlo simulation., Comment: No
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- 2023
8. Secrecy Outage Analysis of Energy Harvesting Relay-based Mixed UOWC-RF Network with Multiple Eavesdroppers
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Ghosh, Moloy Kumar, Kundu, Milton Kumar, Ibrahim, Md, Badrudduza, A. S. M., Anower, Md. Shamim, Ansari, Imran Shafique, Shaikhi, Ali A., and Mohandes, Mohammed A.
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Computer Science - Information Theory ,Electrical Engineering and Systems Science - Signal Processing - Abstract
This work deals with the physical layer security performance of a dual-hop underwater optical communication (UOWC)-radio frequency (RF) network under the intruding attempts of multiple eavesdroppers via RF links. The intermediate decode and forward relay node between the underwater source and the destination transforms the optical signal into electrical form and re-transmits it to the destination node with the help of harvested energy by the relay from an integrated power beacon within the system. The source-to-relay link (UOWC) follows a mixture exponential generalized Gamma turbulence with pointing error impairments whereas all the remaining links (RF) undergo $\kappa-\mu$ shadowed fading. With regards to the types of intruders, herein two scenarios are considered, i.e., colluding (\textit{Scenario-I}) and non-colluding (\textit{Scenario-II}) eavesdroppers and the analytical expressions of secure outage probability, probability of strictly positive secrecy capacity, and effective secrecy throughput are derived in closed form for each scenario. Furthermore, the impacts of UOWC and RF channel parameters as well as detection techniques on secrecy capacity are demonstrated, and following this a comparison between the two considered scenarios is demonstrated that reveals the collusion between the eavesdroppers imposes the most harmful threat on secrecy throughput but a better secrecy level can be attained adopting diversity at the destination and power beacon nodes along with heterodyne detection rather than intensity modulation and direct detection technique. Finally, all the derived expressions are corroborated via Monte Carlo simulations., Comment: No
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- 2023
9. Comparing students' performance in self-directed and directed self-learning in College of Medicine, University of Bisha
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Karimeldin M. Salih, MD, Jaber Al-Faifi, MD, Mohannad M. Alamri, MD, Osama A. Mohamed, MD, Sameer M. Khan, MD, Vijaya Marakala, MD, Nahid A. Mohammed, MD, Suaad E. Mohamed, MD, Abdullah A. Hashish, MD, Hany M.A. Sonpol, MD, Tarig B.A. Khalid, MD, Wafa I. Elhag, MD, Ahmed Y. Alameer, MD, Ashraf S. Metwally, MD, Amar I.O. Yahia, MD, Mutasim E. Ibrahim, MD, Magaji G. Taura, MD, and Ayman M. El-Ashkar, MD
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Difficulty index ,Directed self-learning ,Point biserial ,Problem-based learning ,Self-directed learning ,Team-based learning ,Medicine (General) ,R5-920 - Abstract
الملخص: أهداف البحث: تزيد استراتيجية التعلم المرتكز على الطالب من احتمالية تخريج أطباء أكفاء ومعتمدين على أنفسهم وقادرين على حل المشكلات. اعتمدت كلية الطب بجامعة بيشة التعلم الموجه ذاتيا ممثلا بالتعلم القائم على حل المشكلات، والتعلم الذاتي الموجه ممثلا بالتعلم القائم على الفريق. طريقة البحث: تم جمع ما مجموعه 502 سؤالا من أسئلة متعددة الخيارات من اختبارات منتصف المقرر والامتحانات النهائية من قبل خبراء المواد ذات الصلة من تسع دورات خلال الفترة من سبتمبر 2020 حتى يونيو 2023 والتي اعتمدت التعلم القائم على حل المشكلات والتعلم القائم على الفريق؛ 247 سؤالا متعدد الأسئلة تتعلق بالتعلم القائم على حل المشكلات و255 سؤالا يتعلق بالتعلم القائم على الفريق. تم استخدام التحليل السيكومتري لتحديد الأسئلة الصعبة والسهلة والأمثل. نقطة ثنائية حيث تشير إلى نقطة ثنائية ضعيفة وهامشية وجيدة وممتازة على التوالي. وأخيرا، تمت محاولة عدد المشتتات الوظيفية بنسبة تزيد عن 5% من المرشحين. النتائج: لا توجد فروق ذات دلالة إحصائية في أداء الطلاب في الاسئلة متعددة الاختيارات المتعلقة بالتعلم المبني على المشكلات (يمثل أداة التعلم الموجه ذاتيا للمجموعات الصغيرة)، والتعلم المبني على الفريق (يمثل أداة التعلم الموجه ذاتيا للمجموعات الكبيرة) فيما يتعلق بمؤشر الصعوبة، ووظائف تشتيت الانتباه. الاستنتاجات: لوحظ أنه لا يوجد فرق في أداء الطلاب سواء تم استخدام التعلم القائم على حل المشكلات أو التعلم القائم على الفريق لتعلم مقررات العلوم الطبية الأساسية. يحتاج التعلم في مجموعات صغيرة مثل التعلم القائم على حل المشكلات إلى موارد أكثر مقارنة بالتعلم في مجموعات كبيرة كما هو الحال في التعلم القائم على الفريق، وبالتالي يمكن لأي كلية أن تقرر استراتيجية التعلم المعتمدة على مواردها وعدد طلابها. Abstract: Background: Student-centered learning strategy increases the likelihood of graduation of competent, self-dependent, and problem-solving physicians. The University of Bisha, College of Medicine (UBCOM) adopted self-directed learning (SDL) represented by problem-based learning (PBL), and directed self-learning (DSL) represented by team-based learning (TBL). Aim: To compare the students’ performance in SDL and DSL among UBCOM students. Methodology: A total of 502 multiple choice questions (MCQs) from the mid-course and final exams were collected by the relevant subject experts from nine courses during the period from September 2020 till June 2023 that adopted PBL and TBL; 247 MCQs related to PBL and 255 related to TBL. Psychometric analysis was used to determine difficult, easy, and optimum questions (≤25%, ≥90%, and 26–89%, respectively). Point biserial as 0.40 which indicate poor, marginal, good, and excellent point biserial, respectively. Finally, the number of functional distractors was attempted by >5% of the candidates. Results: No significant differences were noted for the students’ performance in MCQs related to PBL (representing self-directed, small group learning tool), and TBL (representing directed-self, large group learning tool) regarding difficulty index (DI), point biserial, and distractors functionality. Conclusion: It has been observed that there is no difference in students’ performance whether PBL or TBL is used for learning Basic Medical Science courses. Small group learning such as PBL needs more resources in comparison to large group learning as in TBL, therefore any institute can decide on the adopted learning strategy depending on its resources and the number of students.
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- 2024
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10. Subclinical hypothyroidism and clinical outcomes after cardiac surgery: A systematic review and meta-analysisCentral MessagePerspective
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Michele Dell’Aquila, BS, Camilla S. Rossi, MD, Tulio Caldonazo, MD, Gianmarco Cancelli, MD, Lamia Harik, MD, Giovanni J. Soletti, MD, Kevin R. An, MD, Jordan Leith, BS, Hristo Kirov, MD, Mudathir Ibrahim, MD, Michelle Demetres, MLIS, Arnaldo Dimagli, MD, Mohamed Rahouma, MD, PhD, and Mario Gaudino, MD
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subclinical hypothyroidism ,thyroid dysfunction ,cardiac surgery ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 ,Surgery ,RD1-811 - Abstract
Background: Subclinical hypothyroidism (SCH) is associated with major adverse cardiovascular events. Despite the recognized negative impact of SCH on cardiovascular health, research on cardiac postoperative outcomes with SCH has yielded conflicting results, and patients are not currently treated for SCH before cardiac surgery procedures. Methods: We performed a study-level meta-analysis on the impact of SCH on patients undergoing nonurgent cardiac surgery, including coronary artery bypass grafting and valve and aortic surgery. The primary outcome was operative mortality. Secondary outcomes were hospital length of stay (LOS), intensive care unit (ICU) stay, postoperative atrial fibrillation (POAF), intra-aortic balloon pump (IABP) use, renal complications, and long-term all-cause mortality. Results: Seven observational studies, with a total of 3445 patients, including 851 [24.7%] diagnosed with SCH and 2594 [75.3%] euthyroid patients) were identified. Compared to euthyroid patients, the patients with SCH had higher rates of operative mortality (odds ratio [OR], 2.57; 95% confidence interval [CI], 1.09-6.04; P = .03), prolonged hospital LOS (standardized mean difference, 0.32; 95% CI, 0.02-0.62; P = .04), a higher rate of renal complications (OR, 2.53; 95% CI, 1.74-3.69; P
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- 2024
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11. Comparison of Oncological and Aesthetic Outcomes between Tissue Rearrangement Technique and Pedicled Latissimus Dorsi Flap Reconstruction in Cases of Upper Outer Quadrant Breast Cancer
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Ahmed S. Ahmed, MD, Mohamed A.K. Mohamed, MD, Hesham S. Mostafa, MD, Abdel Naser M.E. El Naggar, MD, Abdel Halim M.A. Ali, MSc, Ahmed Safaa Ahmed, MD, and Mostafa F. Ibrahim, MD
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Surgery ,RD1-811 - Abstract
Background:. Emerging as an adjunct to breast-conserving surgery, oncoplastic breast surgery seeks to improve the cosmetic and functional outcomes for breast cancer surgery. The objective was to assess the potential advantages of using the latissimus dorsi (LD) flap, in comparison with local tissue rearrangement, in terms of aesthetic results and postoperative problems. Methods:. This study compared the outcomes of patients with a malignant tumor removed from the upper outer quadrant of the breast using a comparative nonrandomized control approach. Participants were split into two groups: reconstruction using local tissue rearrangement was performed on 20 patients (group A), and a pedicled LD flap was used to treat the same number of patients (group B). All patients were examined in the clinics’ outpatient setting. Every 3 months, the medical oncology team would do a thorough clinical assessment. Results:. Better aesthetic outcomes were significantly higher among patients with an LD flap. The LD flap was able to maintain breast shape in 90%, breast volume in 85%, and the nipple-areola complex direction in 90% of patients. Surgeons’ evaluation of both techniques reported significantly higher satisfaction for LD flap than local tissue replacement. Patient satisfaction was significantly higher among patients with an LD flap. With regard to the postoperative complications, there were no significant differences between either group. Conclusions:. Oncoplastic breast surgery with reconstruction using the pedicled LD flap provides maintenance of the shape of female breasts with better aesthetic outcomes and patient and surgeon satisfaction than reconstruction using local tissue rearrangement, with a comparable complication rate.
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- 2024
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12. Use of Dermal Substitute Matrices for Coverage of Exposed Limb Vascular Repairs: A Literature Review
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Kareem W. Makkawi, MD, Paul T. Beaineh, MD, Natasha T. Habr, MD, and Amir E. Ibrahim, MD
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Surgery ,RD1-811 - Abstract
Background:. Prompt coverage of vascular repairs in the extremities is needed to protect from desiccation and trauma. In the absence of local soft tissues to provide early coverage pending demarcation of the tissues and the zone of injury, there is no clear data in the literature on the ideal coverage method. This article is the first to review the use of dermal substitutes for temporary coverage of extremity vascular repairs pending definitive coverage. Methods:. We conducted a review of the literature to identify previous articles indexed in PubMed and Ovid using these search terms: [(skin) OR (artificial skin) OR (Integra) OR (dermal substitute) OR (dermal substitute matrix) OR (dermal regeneration) OR (dermal regeneration matrix) OR (dermal regeneration template)] AND [(bypass) OR (graft) OR (vascular surgery) OR (revascularization) OR (salvage) OR (limb salvage) OR (vascular repair) OR (artery repair) OR (arterial repair)] AND [(limb) OR (extremity) OR (leg) OR (arm) OR (vascular injury) OR (amputation)]. Results:. Of the 32 articles retrieved for initial review, five case reports with six patients of dermal substitute use for direct coverage of extremity repairs were identified. In all cases, the dermal substitute was able to provide stable coverage pending definitive coverage or was allowed to heal secondarily. Conclusions:. Dermal substitute matrices are a potential means of temporary coverage of exposed extremity vascular repairs when there is a paucity of local soft tissues pending more definitive coverage.
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- 2024
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13. Heart Transplantation for Uhl Anomaly in an Adult
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Omar Toubat, MD, PhD, Jason J. Han, MD, Jarrod D. Predina, MD, MTR, Lee R. Goldberg, MD, and Michael E. Ibrahim, MD, PhD
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cardiac transplantation ,heart failure ,Uhl anomaly ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Uhl anomaly is characterized by the morphologic absence of right ventricular myocardium and is an exceedingly rare cause of nonischemic cardiomyopathy. We report the first case of a successful heart transplantation in a 41-year-old patient who presented in cardiogenic shock from Uhl anomaly causing decompensated right ventricular failure.
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- 2024
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14. Kikuchi-Fujimoto Disease: A Case Report of Prolonged Fever and Lymphadenopathy in a Young Girl
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Ezat Mohammed Anini MD, Taha Mahmoud AlBaik MD, Ahmed Tayseer Ibrahim MD, Nasim Afif AbuKaresh MD, Maram Albandak MD, Rafat Alshalaldeh MD, Motaz Natsheh MD, and Fawzy M. Abunejma MD
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Medicine (General) ,R5-920 ,Pathology ,RB1-214 - Abstract
Kikuchi-Fujimoto disease (KFD) is a benign and self-limited disorder that usually presents with regional cervical lymphadenopathy and fever. We report a case of a 12-year-old female who complained of fever, night sweating, significant weight loss, and tender right cervical lymph node enlargement for 2 months. A full workup including laboratory tests and imaging studies, an excisional biopsy, and histopathological analysis were done, and the diagnosis of KFD was confirmed. The patient was treated with analgesia and oral prednisolone, resulting in good improvement. A high degree of clinical suspicion is imperative for physicians, given the rarity of the disease and the associated diagnostic challenges.
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- 2024
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15. Insights from a computational analysis of the SARS-CoV-2 Omicron variant: Host-pathogen interaction, pathogenicity and possible therapeutics
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Parvez, Md Sorwer Alam, Saha, Manash Kumar, Ibrahim, Md., Araf, Yusha, Islam, Md. Taufiqul, Ohtsuki, Gen, and Hosen, Mohammad Jakir
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Quantitative Biology - Other Quantitative Biology - Abstract
Prominently accountable for the upsurge of COVID-19 cases as the world attempts to recover from the previous two waves, Omicron has further threatened the conventional therapeutic approaches. Omicron is the fifth variant of concern (VOC), which comprises more than 10 mutations in the receptor-binding domain (RBD) of the spike protein. However, the lack of extensive research regarding Omicron has raised the need to establish correlations to understand this variant by structural comparisons. Here, we evaluate, correlate, and compare its genomic sequences through an immunoinformatic approach with wild and mutant RBD forms of the spike protein to understand its epidemiological characteristics and responses towards existing drugs for better patient management. Our computational analyses provided insights into infectious and pathogenic trails of the Omicron variant. In addition, while the analysis represented South Africa's Omicron variant being similar to the highly-infectious B.1.620 variant, mutations within the prominent proteins are hypothesized to alter its pathogenicity. Moreover, docking evaluations revealed significant differences in binding affinity with human receptors, ACE2 and NRP1. Owing to its characteristics of rendering existing treatments ineffective, we evaluated the drug efficacy against their target protein encoded in the Omicron through molecular docking approach. Most of the tested drugs were proven to be effective. Nirmatrelvir (Paxlovid), MPro 13b, and Lopinavir displayed increased effectiveness and efficacy, while Ivermectin showed the best result against Omicron., Comment: 30 pages, 5 figures
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- 2022
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16. Rationale and Design of the Randomized Bayesian Multicenter COME-TAVI Trial in Patients With a New Onset Left Bundle Branch Block
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Lena Rivard, MD, MSc, Isabelle Nault, MD, Andrew D. Krahn, MD, Benoit Daneault, MD, Jean-Francois Roux, MD, Madhu Natarajan, MD, Jeffrey S. Healey, MD, MSc, Kenneth Quadros, MD, Roopinder K. Sandhu, MD, MPH, Remi Kouz, MD, Isabelle Greiss, MD, Peter Leong-Sit, MD, Jean Baptiste Gourraud, MD, Walid Ben Ali, MD, PhD, Anita Asgar, MD, Msc, Martin Aguilar, MD, PhD, Raoul Bonan, MD, Julia Cadrin-Tourigny, MD, PhD, Raymond Cartier, MD, Jean-Francois Dorval, MD, Marc Dubuc, MD, Nicolas Dürrleman, MD, MSc, Katia Dyrda, MD, Peter Guerra, MD, Marina Ibrahim, MD, MSc, Reda Ibrahim, MD, Laurent Macle, MD, Blandine Mondesert, MD, Emmanuel Moss, MD, MSc, Alexandre Raymond-Paquin, MD, Denis Roy, MD, Rafik Tadros, MD, PhD, Bernard Thibault, MD, Mario Talajic, MD, Anna Nozza, MSc, Marie-Claude Guertin, PhD, and Paul Khairy, MD, PhD
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Patients with new-onset left bundle branch block (LBBB) after transcatheter aortic valve implantation (TAVI) are at risk of developing delayed high-degree atrioventricular block. Management of new-onset LBBB post-TAVI remains controversial. In the Comparison of a Clinical Monitoring Strategy Versus Electrophysiology-Guided Algorithmic Approach in Patients With a New LBBB After TAVI (COME-TAVI) trial, consenting patients with new-onset LBBB that persists on day 2 after TAVI, meeting exclusion/inclusion criteria, are randomized to an electrophysiological study (EPS)-guided approach or 30-day electrocardiographic monitoring. In the EPS-guided approach, patients with a His to ventricle (HV) interval ≥ 65 ms undergo permanent pacemaker implantation. Patients randomized to noninvasive monitoring receive a wearable continuous electrocardiographic recording and transmitting device for 30 days. Follow-up will be performed at 3, 6, and 12 months. The primary endpoint is a composite outcome designed to capture net clinical benefit. The endpoint incorporates major consequences of both strategies in patients with new-onset LBBB after TAVI, as follows: (i) sudden cardiac death; (ii) syncope; (iii) atrioventricular conduction disorder requiring a pacemaker (for a class I or IIa indication); and (iv) complications related to the pacemaker or EPS. The trial incorporates a Bayesian design with a noninformative prior, outcome-adaptive randomization (initially 1:1), and 2 prespecified interim analyses once 25% and 50% of the anticipated number of primary endpoints are reached. The trial is event-driven, with an anticipated upper limit of 452 patients required to reach 77 primary outcome events over 12 months of follow-up. In summary, the aim of this Bayesian multicentre randomized trial is to compare 2 management strategies in patients with new-onset LBBB post-TAVI—an EPS-guided approach vs noninvasive 30-day monitoring. Trial registration number: NCT03303612. Résumé: Les patients chez qui un bloc de branche gauche (BBG) est récemment apparu à la suite de l’implantation valvulaire aortique par cathéter (IVAC) présentent un risque de bloc auriculoventriculaire de haut degré tardif. La prise en charge d’un BBG récemment apparu après une IVAC demeure controversée. Dans le cadre de l’essai COME-TAVI (Comparison of a Clinical Monitoring Strategy Versus Electrophysiology-Guided Algorithmic Approach in Patients With a New LBBB After TAVI, ou comparaison d’une stratégie de surveillance clinique, par rapport à une approche guidée par étude électrophysiologique et fondée sur un algorithme, chez des patients présentant un BBG d’apparition récente à la suite d’une IVAC), des patients qui présentent un BBG d’apparition récente persistant le 2e jour après une IVAC, qui répondent aux critères d’admissibilité et qui ont donné leur consentement sont répartis aléatoirement pour être suivis à l’aide d’une approche guidée par une étude électrophysiologique (EEP) ou faire l’objet d’une surveillance électrocardiographique d’une durée de 30 jours. Un stimulateur cardiaque est implanté chez les patients du groupe de l’EEP dont l’intervalle HV (temps de conduction dans le tronc du faisceau de His jusqu’aux ventricules) est ≥ 65 ms. Les patients du groupe de surveillance non invasive reçoivent un dispositif portable d’enregistrement et de transmission continue de données électrocardiographiques pour une période de 30 jours. Le suivi sera réalisé aux 3e, 6e et 12e mois. Le critère d’évaluation principal est un paramètre composite conçu afin de saisir le bienfait clinique net. Il comprend les conséquences majeures des deux stratégies chez les patients présentant un BBG d’apparition récente après une IVAC, comme suit : (i) mort subite d’origine cardiaque; (ii) syncope; (iii) trouble de la conduction auriculoventriculaire nécessitant la pose d’un stimulateur cardiaque (pour une indication de classe I ou IIa); et (iv) complications relatives au stimulateur cardiaque ou à l’EEP. L’essai intègre une conception bayésienne avec une répartition aléatoire (dans un rapport initial de 1:1) antérieure non informative adaptée aux résultats et deux analyses intermédiaires définies au préalable lorsque 25 % et 50 % du nombre anticipé des critères d’évaluation principaux seront atteints. L’essai est axé sur les événements, et la limite supérieure anticipée pour atteindre 77 événements relatifs aux critères d’évaluation principaux sur 12 mois de suivi est de 452 patients. En résumé, l’objectif de cet essai bayésien multicentrique à répartition aléatoire est de comparer deux stratégies de prise en charge de patients présentant un BBG d’apparition récente après une IVAC, soit une approche guidée par une EEP, par rapport à une surveillance non invasive de 30 jours. Trial registration number: NCT03303612.
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- 2023
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17. Treatment of acne keloidalis nuchae and dissecting cellulitis of the scalp with diclofenac sodium gel: a case series
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Eduardo A. Michelen-Gómez, MD, Zelma C. Chiesa Fuxench, MD, MSCE, Karina J. Cancel-Artau, MD, Amara Guerrero, MD, Omer Ibrahim, MD, Luis E. Santaliz-Ruiz, IV, MD, and Francisco Colon-Fontanez, MD
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Acne keloidalis nuchae ,dissecting cellulitis of the scalp ,cicatricial alopecia ,diclofenac ,Dermatology ,RL1-803 - Published
- 2023
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18. On Effective Secrecy Throughput of Underlay Spectrum Sharing $\alpha$-$\mu$/ M\'alaga Hybrid Model under Interference-and-Transmit Power Constraints
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Ibrahim, Md., Badrudduza, A. S. M., Hossen, Md. Shakhawat, Kundu, M. K., and Ansari, Imran Shafique
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Computer Science - Information Theory ,Electrical Engineering and Systems Science - Signal Processing - Abstract
The underlay cognitive radio-based hybrid radio frequency / free-space optical (RF / FSO) systems have been emerged as a promising technology due to its ability to eliminate spectrum scarcity and spectrum under-utilization problems. Consequently, this work analyzes the physical layer security aspects of a cognitive RF / FSO hybrid network that includes a primary user, a secondary source, a secondary receiver, and an eavesdropper where the secret communication takes place between two legitimate secondary peers over the RF and FSO links simultaneously, and the eavesdropper can overhear the RF link only. In particular, the maximum transmit power limitation at the secondary user as well as the permissible interference power restriction at the primary user are also taken into consideration. All the RF links are modeled with $\alpha$-$\mu$ fading whereas the FSO link undergoes M\'alaga (M) turbulence with link blockage and pointing error impairments. At the receiver, the selection combining diversity technique is utilized to select the signal with the best electrical signal-to-ratio (SNR). Moreover, the closed-form expressions for the secrecy outage probability, probability of strictly positive secrecy capacity, and effective secrecy throughput are derived to analyze the secrecy performance. Besides, the impacts of fading, primary-secondary interference, detection techniques, link blockage probability, atmospheric turbulence, and pointing error are examined. Finally, Monte-Carlo simulations are performed to corroborate the derived expressions.
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- 2021
19. Expert deep learning techniques for remaining useful life prediction of diverse energy storage Systems: Recent Advances, execution Features, issues and future outlooks
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Ansari, Shaheer, Ammirrul Atiqi Mohd Zainuri, Muhammad, Ayob, Afida, Hossain Lipu, M.S., Siddikur Rahman, Md., Ibrahim, Md, and Hannan, M.A.
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- 2024
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20. Detailed modelling and performance analysis of power flow topology in a hybrid electric vehicle having series-parallel architecture
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Fareed Mohammad, Sheikh, Ilahi Bakhsh, Farhad, Ibrahim, Md, Mumtaz, Naiyer, and Hameed, Salman
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- 2024
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21. Effects of co-channel interference on RIS empowered wireless networks amid multiple eavesdropping attempts
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Ruku, Md. Roisul Ajom, Ibrahim, Md., Badrudduza, A.S.M., Ansari, Imran Shafique, Khalid, Waqas, and Yu, Heejung
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- 2024
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22. Comparative Study between Gluteal Artery Perforator Flaps and Local Fasciocutaneous Flaps in Reconstruction of Gluteal Pressure Ulcers
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Abdel Nasser Mohamed El Naggar, MD, PhD, Mostafa Fathy Ibrahim, MD, PhD, Khaled Mohamed Abdel Azeem, MD, PhD, Ahmed Hamdy Mahmoud Ibrahim, MSC, MRCS, and Emad Mohamed Hawas, MD, PhD
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Surgery ,RD1-811 - Abstract
Background:. Gluteal pressure ulcers are a common problem, associated with great morbidity and cost, and their surgical treatment includes debridement with complete bursectomy, followed by soft tissue coverage. Gluteal artery perforator flaps and gluteal fasciocutaneous flaps are commonly preferred for reconstruction because they preserve the gluteal muscle, allowing for revision in recurrent cases. The aim of this study was to evaluate the differences between these two flaps in the reconstruction of gluteal pressure ulcers regarding operative time, postoperative hospital stay, postoperative complications, and recurrence. Methods:. This prospective comparative study was conducted on 30 patients who presented with stage IV gluteal pressure ulcers. Patients were randomly allocated into two equal groups: each group consisted of 15 patients. Cases in group A were reconstructed using gluteal artery perforator flaps, and those in group B were reconstructed using local fasciocutaneous flaps. Results:. There was statistically significant long operative time and short postoperative hospital stay in gluteal artery perforator flaps when compared with local fasciocutaneous flaps. Also, the fasciocutaneous group reported a higher nonsignificant complication rate when compared with the gluteal perforator group. No recurrent cases were reported, and most patients had satisfactory outcomes in both groups. Conclusion:. Both techniques are safe, reliable, and effective and can be considered as a first-line option in the reconstruction of gluteal pressure ulcers.
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- 2024
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23. Localized Calcific Constrictive Pericarditis with Apical Bi-ventricular Outpouching Mimicking Aneurysm Formation
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Sherif Nabil, MD, Rana Khafagy, MD, Sara Tantawy, MD, PhD, Marwa Ali Gamal, MD, Ghada Samir, Shaimaa Salah, MD, and Ahmed Samir Ibrahim, MD, PhD
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2024
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24. Solid as a Rock, but Sly as a Fox: Not All Tricuspid Valve Related Masses Are Bland Vegetations in SLE
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Sara Tantawy, MD, PhD, Ghada Samir, MD, Rana Khafagy, MD, Marwa Ali Gamal, MD, Sherif Nabil, MD, Shaimaa Salah, MD, Mariam kamal, MD, Basant Raief, MD, Sarah Elsharkawy, MD, Mahmoud Shaaban, MD, PhD, FSCMR, and Ahmed Samir Ibrahim, MD, PhD
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2024
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25. Decreased Right-to-left Ventricular Blood Pool T2 Ratio on Cardiac MRI Is Associated with Adverse Cardiac Events and Impaired Cardiopulmonary Exercise Function
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Moran Drucker Iarovich, MD, Fadi Ibrahim, MD, Joao Francisco Matos, MD, Nilushi De Silva, BSc, William Holden Lowes, BSc, Yas Moayedi, MD, Dinesh Thavendiranathan, MD, and Kate Hanneman, MD, MPH
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2024
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26. Abbreviated Cardiac MRI Protocol with Post-contrast Cine SSFP: Reproducibility, Contrast-to-noise Ratio, and Energy Savings
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Fadi Ibrahim, MD, BSc, Farah Cadour, MD, MSc, Dinesh Thavendiranathan, MD, Bradley Allen, MD, MSc, FSCMR, and Kate Hanneman, MD, MPH
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2024
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27. CMR Differentiation of Hypertensive Cardiomyopathy and Cardiac Amyloidosis in Hypertensive Patients Using Histology as the Gold Standard
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Katarzyna Gil, MD, PhD, Vien Truong, MD, Chuanfen Liu, Dalia Ibrahim, MD, Katarzyna Mikrut, MD, Anjali Satoskar, MD, Rami Kahwash, MD, and Yuchi Han, MD, FSCMR
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2024
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28. Transaortic TAVR and Mitral Repair Under Deep Hypothermic Circulatory Arrest in a Porcelain Aorta Patient
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Fotios Pitoulis, MD, PhD, Blanca Pamias-Lopez, MD, Charlie Fraser, MD, Akhil Rao, BSc, Lisa Mangino-Blanchard, NP, William Vernick, MD, Ronak Shah, MD, Jeremy Kukafka, MD, Audrey Spelde, MD, Michael Acker, MD, Wilson Szeto, MD, and Michael Ibrahim, MD, PhD
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deep hypothermic circulatory arrest ,mitral annulus calcification ,mitral repair ,porcelain aorta ,TAVR ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Vascular and valvular calcifications, commonly seen in renal patients, increase operative mortality and can preclude conventional valvular management. We show a novel approach to treat aortic stenosis and degenerative mitral regurgitation under hypothermic circulatory arrest in a hemodialysis patient with aortic, mitral disease and porcelain aorta with surgical and transcatheter contraindications.
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- 2024
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29. Enhancing Security of TAS/MRC Based Mixed RF-UOWC System with Induced Underwater Turbulence Effect
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Ibrahim, Md., Badrudduza, A. S. M., Hossen, Md. Shakhawat, Kundu, Milton Kumar, and Ansari, Imran Shafique
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Computer Science - Information Theory ,Electrical Engineering and Systems Science - Signal Processing - Abstract
Post commercial deployment of fifth-generation (5G) technologies, the consideration of sixth-generation (6G) networks is drawing remarkable attention from research communities. Researchers suggest that similar to 5G, 6G technology must be human-centric where high secrecy together with high data rate will be the key features. These challenges can be easily overcome utilizing PHY security techniques over high-frequency free-space or underwater optical wireless communication (UOWC) technologies. But in long-distance communication, turbulence components drastically affect the optical signals, leading to the invention of the combination of radio-frequency (RF) links with optical links. This work deals with the secrecy performance analysis of a mixed RF-UOWC system where an eavesdropper tries to intercept RF communications. RF and optical links undergo $\eta-\mu$ and mixture exponential generalized Gamma distributions, respectively. To keep pace with the high data rate of optical technologies, we exploit the antenna selection scheme at the source and maximal ratio combining diversity at the relay and eavesdropper, while the eavesdropper is unaware of the antenna selection scheme. We derive closed-form expressions of average secrecy capacity, secrecy outage probability, and strictly positive secrecy capacity to demonstrate the impacts of the system parameters on the secrecy behavior. Finally, the expressions are corroborated via Monte-Carlo simulations.
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- 2021
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30. Predictors of outcomes in patients with obesity following mitral valve surgeryCentral MessagePerspective
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Ahmed Alnajar, MD, MSPH, Kelley N. Benck, BS, Tawseef Dar, MD, Sameer A. Hirji, MD, MPH, Walid Ibrahim, MD, Brian Detweiler, MS, Venkat Vuddanda, MD, MS, Raymond Balise, PhD, J. Sunil Rao, PhD, Min Lu, PhD, and Joseph Lamelas, MD
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adult cardiac ,obesity ,mitral valve ,mortality ,machine learning ,random forest ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 ,Surgery ,RD1-811 - Abstract
Objective: Few studies have assessed the outcomes of mitral valve surgery in patients with obesity. We sought to study factors that determine the in-hospital outcomes of this population to help clinicians provide optimal care. Methods: A retrospective analysis of adult patients with obesity who underwent open mitral valve replacement or repair between January 1, 2012, and December 31, 2020, was conducted using the National Inpatient Sample. Weighted logistic regression and random forest analyses were performed to assess factors associated with mortality and the interaction of each variable. Results: Of the 48,775 patients with obesity, 34% had morbid obesity (body mass index ≥40), 55% were women, 66% underwent elective surgery, and 55% received isolated open mitral valve replacement or repair. In-hospital mortality was 5.0% (n = 2430). After adjusting for important covariates, a greater risk of mortality was associated with older patients (adjusted odds ratio [aOR], 1.24; 95% CI, 1.08-1.43), higher Elixhauser comorbidity score (aOR, 2.10; 95% CI, 1.87-2.36), prior valve surgery (aOR, 1.63; 95% CI, 1.01-2.63), and more than 2 concomitant procedures (aOR, 2.83; 95% CI, 2.07-3.85). Lower mortality was associated with elective admissions (aOR, 0.70; 95% CI, 0.56-0.87) and valve repair (aOR, 0.58; 95% CI, 0.46-0.73). Machine learning identified several interactions associated with early mortality, such as Elixhauser score, female sex, body mass index ≥40, and kidney failure. Conclusions: The complexity of presentation, comorbidities in older and female patients, and morbid obesity are independently associated with an increased risk of mortality in patients undergoing open mitral valve replacement or repair. Morbid obesity and sex disparity should be recognized in this population, and physicians should consider older patients and females with multiple comorbidities for earlier and more opportune treatment windows.
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- 2023
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31. Patterns of acute pediatric intoxication in Aljouf Province, KSA
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Mahrous A. Ibrahim, MD, Khaled N. Alfahd, Abdulaziz T. Alruwaili, Naif A. Alruwaili, Bashar H. Alanazi, and Enas M.A. Mostafa, MD
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Acute toxicity ,Aljouf ,Child health ,Pediatric toxicity ,Toxic agent ,Medicine (General) ,R5-920 - Abstract
الملخص: أهداف البحث: على الرغم من أن تسمم الأطفال يمكن تجنبه ، إلا أنه لا يزال سببًا رئيسيًا للمراضة والوفيات في كل من البلدان النامية والمتقدمة. الهدف من هذه الدراسة هو تقييم نمط ونتائج تسمم الأطفال الحاد في الجوف ، المملكة العربية السعودية. طرق البحث: أجريت دراسة وصفية بأثر رجعي في كل من مستشفيات الأمير متعب بن عبد العزيز ، ومستشفيات الولادة والأطفال في الجوف بالمملكة العربية السعودية. تم تضمين جميع حالات التسمم الحاد لدى الأطفال الذين تقل أعمارهم عن 18 عامًا من 1 يناير 2015 إلى 31 ديسمبر 2021 في الدراسة. تضمن تحليل البيانات الخصائص الديموغرافية ، سنة وشهر التسمم ، مكان ، وقت ، شكل وطريق التعرض للعامل السام ، طريقة التسمم ، العامل / العوامل السامة المعنية ، حالة الطفل المتسمم عند وصوله إلى المستشفى ، العرض السريري ، تلقي العلاج وتاريخ القبول والمصير. النتائج: بلغ العدد الإجمالي للحالات المبلغ عنها 540 حالة. وكانت معظم حالات التسمم الحاد لدى الأطفال في الفئة العمرية 1 - أقل من 6 سنوات (79٪). كان أعلى معدل لتسمم الأطفال الحاد المبلغ عنه في عام 2017 (23.9٪). كانت العقاقير الدوائية مسؤولة عن معظم الحالات المبلغ عنها (41٪). كانت معظم الحالات بدون أعراض (84٪) وقت الدخول. فيما يتعلق بحالات الأعراض ، كانت المظاهر السريرية للجهاز الهضمي هي أكثر الأعراض التي تم الإبلاغ عنها. تم قبول أربعين في المائة من الحالات المدروسة بالقسم الداخلي. ومن المثير للاهتمام ، أن 29.4٪ تم تسريحهم ضد الاستشارة الطبية. أظهر حوالي 43 ٪ من الحالات المبلغ عنها الشفاء التام. أظهر نموذج الانحدار اللوجستي للتنبؤ بالطريقة العرضية للتسمم أن العمر والإقامة فقط لهما علاقة ذات دلالة إحصائية. الاستنتاجات: يعتبر تسمم الأطفال الحاد مشكلة حقيقية في الجوف بالمملكة العربية السعودية. يجب إثارة المخاوف لتعزيز وعي مقدمي الرعاية بالعوامل السامة الخطرة وعوامل الخطر لتسمم الأطفال وتنفيذ استراتيجيات وقائية فعالة لتقليل حدوث تسمم الأطفال. Abstract: Objectives: Although childhood intoxication is avoidable, it remains a leading cause of morbidity and mortality in both developing and developed countries. The aim of this study was to assess the patterns and outcomes of acute pediatric intoxication in Aljouf, KSA. Methods: A retrospective record-based descriptive study was conducted at the Prince Mutaib bin Abdulaziz hospital, and the Maternity and Children's hospital in Aljouf, KSA. All cases of acute intoxication in children younger than 18 years of age from January 1, 2015 to December 31, 2021 were included. Data analysis included demographic characteristics; year and month of intoxication; place, time, form, and route of toxic agent exposure; manner of intoxication; toxic agent/agents involved; intoxicated child's status upon arrival at the hospital; clinical presentation; treatment; admission history; and outcome. Results: A total of 540 cases were reported. Most (79%) acutely intoxicated children were in 1 to
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- 2023
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32. Advancement of Nonlife Insurance in Both Public and Private Sectors in Bangladesh
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Ibrahim, Md, primary and Roy, Sunil Kumar, additional
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- 2023
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33. Blood Loss in Primary Unilateral Total Knee Arthroplasty with Limited Tourniquet Application
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Doried Diri, MD, Hakam Alasaad, MD, Sedra Abou Ali Mhana, MD, Hussain Muhammed, MD, and Jaber Ibrahim, MD, PhD
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Orthopedic surgery ,RD701-811 - Abstract
Background:. Tourniquet application in total knee arthroplasty (TKA) has many benefits and may have a role in the incidence of perioperative complications. Our aims were to examine the safety of applying a tourniquet for a limited amount of time during primary unilateral TKA (specifically, during cementation and final component fixation only) and to compare perioperative complications between the limited-application group and the full-application group. Methods:. We conducted a randomized controlled study of 62 patients undergoing primary unilateral TKA. Patients were randomly allocated to either the limited or full tourniquet application. The follow-up period was 6 months. We evaluated intraoperative, postoperative, total, and hidden blood loss as the primary outcome measures and clearance of the surgical field, operative duration, and perioperative complications as the secondary outcome measures. Results:. We found a significant difference in surgical field clearance between the groups. There was no significant difference in total, hidden, or postoperative blood loss between the groups. Mean intraoperative blood loss was significantly lower in the full-application group than in the limited-application group (171.742 ± 19.710 versus 226.258 ± 50.290 mL; p = 0.001). Perioperative complications, including allogeneic blood transfusion rates, did not significantly differ between the groups. Conclusions:. Limited tourniquet application is safe to use in primary unilateral TKA and does not increase the incidence of perioperative complications or total blood loss when compared with a standard, full-time tourniquet application. Level of Evidence:. Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.
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- 2023
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34. The Impact of Living With Chronic Hepatitis B on Quality of Life: Implications for Clinical Management
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Yasmin Ibrahim MD, PhD, Madeleine Umstead, Su Wang MD, MPH, and Chari Cohen DrPH, MPH
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Medicine (General) ,R5-920 - Abstract
Living with chronic hepatitis B (CHB) has physical, social, and emotional impacts that often negatively affect patients’ quality of life. These impacts are not usually captured during routine care. This article presents information on the impact of living with CHB and the importance of integrating health-related quality-of-life assessment into CHB care. Using a global online survey, people ages ≥18 living with CHB were asked about physical, social, and worry impacts. Of 1707 respondents, most were male (67%),
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- 2023
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35. Determination of Appropriate Umbilicus Position during Abdominoplasty in Male Patients
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Bishara S. Atiyeh, MD, Saif E. Emsieh, MD, Amir E. Ibrahim, MD, Romeu R. Fadul, MD, Christopher R.A. Hakim, MD, Anika G. Gnaedinger, MD, Ahmad K. Oneisi, MD, Rawad S. Chalhoub, MD, and Paul T. Beaineh, MD
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Surgery ,RD1-811 - Abstract
Background:. Abdominoplasty techniques are well documented. The ideal position of the umbilicus has, however, received limited attention. Unfortunately, umbilicus position is not universally agreed upon in male cosmetic abdominoplasty. This study was conducted to determine the ideal umbilicus anthropometric measurements in young men, and the relationships between umbilical position and anterior trunk and torso reference points that may be applicable to intraoperative positioning. It is aimed also at investigating whether umbilicus position would be more accurately determined by considering nipple position instead of the abdominal crease, as recently proposed. Methods:. Several anthropometric measurements of various anterior abdominal and thoracic landmarks were conducted on 60 young and middle-aged male volunteers and 30 cadavers at São Paulo city. All statistical analysis was completed using Stata software. Results:. Of all the measured reference points, a much stronger correlation (0.513) was demonstrated between umbilicus-anterior axillary fold (U-AX) and inter-nipple (N-N) distances with a constant golden number ratio relationship (N-N = U-AX × 0.618) compared with the weak correlation of 0.034 between umbilicus-xiphisternum and umbilicus-abdominal crease. In 75% of volunteers, the calculated U-AX was within ±3 cm of actual measurement, and in 33.33% within ±1 cm. Conclusions:. U-AX = 1.618 × N-N equation is more predictive of adequate umbilicus repositioning during abdominoplasty in male patients. Chest and abdomen of men are a single aesthetic unit. Proper positioning of the nipples and umbilicus, as well as harmonious abdominal and torso proportions are critical for an optimal final aesthetic outcome.
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- 2023
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36. The Study of Carotid Artery Intima-Media Thickness in Children With Epilepsy on Anti-Epileptic Drugs
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Khaled Amin Nasef MD, Moustafa Kotb Elmala MD, Alsayed Mohamed Sayed Ahmed MD, Ashraf Hamed Al-shokary MD, Asmaa Obada Ibrahim MD, Naglaa M. Kamal MD, Hany Abdelaziz Suliman MD, Nageh Shehata Ismail MD, Ahmed Sobhi MD, Hatem Hamed Elshorbagy MD, Ahmed Maher Abdelnasser MD, Ahmed Abdallah Torky MD, and Waleed Elsayed Abdelghani MD
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Pediatrics ,RJ1-570 - Abstract
Objectives . To evaluate carotid artery intima-media thickness (CIMT) and lipid profile in children with epilepsy on long-term antiepileptic drug (AED) monotherapy. Methods . We included 60 children with epilepsy receiving valproate, carbamazepine, or levetiracetam monotherapy and 60 controls. A high-resolution B-mode ultrasound was used to measure (CIMT). Measurement of serum lipids was done. Results . Patients on valproate (0.44 ± 0.03, P ≤ .001), carbamazepine (0.43 ± 0.03with P ≤ .001), and levetiracetam (0.44 ± 0.02 with P ≤ .001) monotherapy showed significantly higher CIMT compared to controls. CIMT was correlated with age ( P = .041, r = .112) AEDs{valproate ( P = .005, r = .731), carbamazepine ( P = .038, r = .365), and levetiracetam ( P = .036, r = .155)}, duration of treatment ( P = .001, r = .313), TC( P = .001, r = .192), TG ( P = .014, r = .018), and LDL ( P = .001, r = .219). HDL ( P = .003, r = −.126). Seizure severity and Apo A1 were insignificantly involved. Conclusion . Long-term monotherapy with valproate, carbamazepine, and levetiracetam in epileptic children was associated with significant abnormalities in CIMT.
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- 2023
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37. Very Late Sinus of Valsalva Sequestration After Transcatheter Aortic Valve Implantation in Native Aortic Annuli
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Homam Ibrahim, MD, Adib Chaus, MD, Cezar Staniloae, MD, Hasan Jilaihawi, MD, Alan Vainrib, MD, Ahmad Alkhalil, MD, Peter Neuberger, MD, Muhammad Saric, MD, and Mathew Williams, MD
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coronary obstruction ,sinus sequestration ,TAVI ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Coronary artery obstruction caused by sinus sequestration is well described after transcatheter aortic valve implantation in failed bioprosthetic valves, which usually occurs during or shortly after the transcatheter aortic valve implantation procedure. We report the presentation, management, and outcomes of 2 cases of very late sinus sequestration in native aortic annuli, which has not been described before to our knowledge. (Level of Difficulty: Advanced.)
- Published
- 2023
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38. A Dual Source 13 Level Inverter with Reduced Component Count for Renewable Energy Applications
- Author
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Iqbal, Hasan, Ibrahim, Md, Tayyab, Mohammad, Sarwar, Adil, Tariq, Mohd, and Sarfraz, Mohammad
- Published
- 2023
- Full Text
- View/download PDF
39. Topical imiquimod in combination with brachytherapy for unresectable cutaneous melanoma scalp metastases
- Author
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Jennifer E. Yeh, MD, PhD, Marilyn T. Wan, MBChB, Allireza Alloo, MD, Nageatte Ibrahim, MD, Ivan Buzurovic, PhD, Jeffrey M. Cohen, MD, Patrick A. Ott, MD, PhD, Alvaro C. Laga, MD, Phillip M. Devlin, MD, and Jennifer Y. Lin, MD
- Subjects
brachytherapy ,imiquimod ,immunomodulation ,melanoma ,radiation ,Dermatology ,RL1-803 - Published
- 2023
- Full Text
- View/download PDF
40. Antopol Goldman lesion: A case report
- Author
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Ala’ Y. Ibrahim, MD, Mohammed Aloqaily, MD, Ahmad Saadeh, MD, Tasneem Aloqaili, and Ali Al-Smair, MD
- Subjects
Antopol goldman lesion ,Hematuria ,Case report ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Antopol Goldman lesion is a renal pelvis subepithelial hematoma or hemorrhage, a sporadic disease. Although the causes are not well established yet, multiple factors were linked. Radiology is the cornerstone for the diagnosis. However, it may be mistaken for renal tumors. Herein we present a case of a 17-year-old male who presented with recurrent flank pain and gross hematuria and was diagnosed with an Antopol Goldman lesion.
- Published
- 2023
- Full Text
- View/download PDF
41. Supercharged Intestinal Interposition for Reconstruction after Complicated Esophagectomy
- Author
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Harrison D. Davis, BS, Stephanie E. Honig, MD, Theodore E. Habarth-Morales, BS, 1LT, Chris Amro, MD, Robyn B. Broach, PhD, Kareem Ibrahim, MD, Michael J. Walker, MD, Ned Z. Carp, MD, Joseph M. Serletti, MD, and Pedro S. Piccinini, M.D.
- Subjects
Surgery ,RD1-811 - Published
- 2024
- Full Text
- View/download PDF
42. CT-Guided Pericardiocentesis in a Case of Tension Pneumopericardium and Tamponade Secondary to an Enteropericardial Fistula
- Author
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Ali O. Ibrahim, MD, Fouad Jaber, MD, Moh’d Alghizzawi, MD, Mark Metzinger, MD, and Talal Asif, MD
- Subjects
cardiac tamponade ,purulent pericarditis ,tension pneumopericardium ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Tension pneumopericardium is most commonly traumatic. Nontraumatic etiologies are rare, but have been reported with gastropericardial and esophagopericardial fistulas. We present the case of a 54-year-old patient who developed a tension pneumopericardium with tamponade secondary to a perforated marginal ulcer in the proximal jejunum with an enteropericardial fistula. (Level of Difficulty: Intermediate.)
- Published
- 2023
- Full Text
- View/download PDF
43. Rice: Role and Responses Under Abiotic Stress
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Rahman, Mohammad Mahfujur, Ibrahim, Md., Muktadir, Md Abdul, Sadeque, Abdus, Abdel Latef, Arafat Abdel Hamed, Ashrafuzzaman, Md, and Abdel Latef, Arafat Abdel Hamed, editor
- Published
- 2022
- Full Text
- View/download PDF
44. Battery materials for electric vehicle – A comprehensive review
- Author
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Kumar Saraogi, Avishek, Ibrahim, Md, Sangeethkumar, E., Ramanathan, V., Jaikumar, M., and Venkatesan, H.
- Published
- 2023
- Full Text
- View/download PDF
45. Topical imiquimod and cryotherapy in combination with systemic immunotherapy in unresectable stage IIIC melanoma
- Author
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Jennifer E. Yeh, MD, PhD, Marilyn T. Wan, MBChB, MPH, Allireza Alloo, MD, Nageatte Ibrahim, MD, Patrick A. Ott, MD, PhD, Elizabeth I. Buchbinder, MD, and Jennifer Y. Lin, MD
- Subjects
cryotherapy ,imiquimod ,immunotherapy ,in-transit metastases ,melanoma ,Dermatology ,RL1-803 - Published
- 2022
- Full Text
- View/download PDF
46. Point of Care Ultrasound Utility in the Setting of Chest Pain: A Case of Takotsubo Cardiomyopathy
- Author
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Ramzi Ibrahim MD, Chelsea Takamatsu MD, and João Paulo Ferreira MD
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pocus ,ultrasound ,takotsubo ,stemi ,acs ,chest pain ,diagnosis ,takotsubo cardiomyopathy ,acute coronary syndrome ,bedside ultrasound ,General works ,R5-130.5 ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Chest pain is a frequently encountered chief complaint in the Emergency Department and entails a broad differential. Point-of-care ultrasound (POCUS) can be utilized to guide diagnostic decision making and initial triaging. Takotsubo cardiomyopathy presents similarly to acute coronary syndrome and has characteristic findings on echocardiogram. This case presentation details a scenario of ST segment elevation on electrocardiogram and elevated high sensitivity troponin levels, worrisome for a ST elevation myocardial infarction (STEMI). Apical hypokinesis to akinesis and apical ballooning were appreciated on echocardiogram, raising suspicion for Takotsubo cardiomyopathy, subsequently confirmed by coronary angiogram. A cardiac focused point-of-care ultrasound assessment can provide valuable information to aid in diagnostic accuracy.
- Published
- 2022
- Full Text
- View/download PDF
47. Magnetic resonance imaging of a temporal lobe cerebral amyloidoma
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Jack Ogilvie, MD, Raymond Zhao, BS, Sandra Camelo-Piragua, MD, Mohannad Ibrahim, MD, Remy Lobo, MD, and John Kim, MD
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Amyloidoma ,Cerebral ,Brain ,Intracranial ,Temporal lobe ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Amyloidomas are focal solitary amyloid masses without systemic involvement that have been observed to occur in various body locations. When presenting intracranially, they pose a challenging diagnostic and therapeutic course given their location and rarity. We report a case of a 62-year-old man with a 4-year history of seizure and headaches. Magnetic resonance imaging was initially inconclusive but revealed an ill-defined right temporal lobe lesion. Biopsy later confirmed a cerebral amyloidoma. We also review the current literature on the pathogenesis, imaging findings, prognosis, and treatment of cerebral amyloidomas.
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- 2022
- Full Text
- View/download PDF
48. Non-shunt Management of Communicating Hydrocephalus in an Immunocompetent Host With Disseminated Central Nervous System Coccidioidomycosis
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Sanjay V. Menghani PhD, Chelsea L. Takamatsu MD, Ramzi Ibrahim MD, Lupita Molina BS, Neha Jaswal MD, and Fariba M. Donovan MD, PhD
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Medicine (General) ,R5-920 ,Pathology ,RB1-214 - Abstract
Disseminated coccidioidomycosis is associated with significant morbidity and mortality. Involvement of the meninges is often fatal if untreated, typically requiring lifelong antifungal therapy and neurosurgical intervention. We present the case of a young male without any known immunocompromising conditions who opted exclusively for medical management of newly diagnosed coccidioidomycosis meningitis with communicating hydrocephalus and discuss the controversy associated with this approach. This case highlights the importance of shared decision-making between patient and clinician, even if the plan diverges from available guidelines. Furthermore, we discuss clinical considerations in approaching the close outpatient monitoring of patients with central nervous system coccidioidomycosis with hydrocephalus.
- Published
- 2023
- Full Text
- View/download PDF
49. Obstruction of the Inferior Vena Cava Following Coronary Artery Bypass Grafting
- Author
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Abdisamad M. Ibrahim, MD, Bellony Nzemenoh, MD, Ranjit John, MD, Dante Dali, DO, Jeremy Markowitz, MD, and Andrea Elliott, MD
- Subjects
cardiogenic shock ,ECMO ,IVC outflow obstruction ,IVC thrombus ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Obstruction of the inferior vena cava (IVC) following coronary artery bypass grafting (CABG) is a rare complication. We describe a case of IVC outflow obstruction secondary to inferior cavoatrial junction injury during CABG. The diagnostic and management approaches used to care for this patient are discussed. (Level of Difficulty: Intermediate.)
- Published
- 2023
- Full Text
- View/download PDF
50. Abstract B005: Regulation of replication-induced PARP1/PARP2 activation by base excision repair: Implications for PARP and PARG inhibitor resistance
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Ibrahim, Md, primary, Khan, Md Maruf, additional, Roos, Wynand P., additional, Al-Rahaleh, Rasha Q., additional, Hayat, Faisal, additional, Migaud, Marie E., additional, and Sobol, Robert W., additional
- Published
- 2024
- Full Text
- View/download PDF
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