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Gupta D, Das A, Mitra S. Role of modeling and artificial intelligence in process parameter optimization of biochar: A review. Bioresour Technol 2023; 390:129792. [PMID: 37820969 DOI: 10.1016/j.biortech.2023.129792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/10/2023] [Accepted: 09/17/2023] [Indexed: 10/13/2023]
Abstract
Enhancement of crop yield, conservation and quality upgradation of soil, and efficient water management are the main objectives of sustainable agriculture and mitigating climate change's impact on agriculture. In recent days, biochar, obtained via thermochemical alteration of biomass is becoming a powerful agent for soil and water quality improvement, carbon sequestration, greenhouse gas emission reduction, and heavy metal adsorption. The present study predominantly focuses on various process parameters related to biochar preparation through pyrolysis, their impact on biochar production as well as physicochemical characteristics, and the optimization of such process parameters. Different designs of the experiment (DOE) and optimization techniques including traditional and non-traditional optimizations are discussed in the current review, along with their applicability and shortcomings. Since the biochar preparation process is tedious and energy-consuming, the present review will help to understand the importance of optimization in preparing biochar, thereby leading to a better way to prepare biochar.
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Affiliation(s)
- Debaditya Gupta
- Agro-ecotechnology Laboratory, School of Agro & Rural Technology, Indian Institute of Technology Guwahati, Assam 781039, India
| | - Ashmita Das
- Agro-ecotechnology Laboratory, School of Agro & Rural Technology, Indian Institute of Technology Guwahati, Assam 781039, India
| | - Sudip Mitra
- Agro-ecotechnology Laboratory, School of Agro & Rural Technology, Indian Institute of Technology Guwahati, Assam 781039, India.
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2
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Ghose A, Gupta D, Nuzelu V, Rangan L, Mitra S. Optimization of laccase enzyme extraction from spent mushroom waste of Pleurotus florida through ANN-PSO modeling: An ecofriendly and economical approach. Environ Res 2023; 222:115345. [PMID: 36706899 DOI: 10.1016/j.envres.2023.115345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 12/18/2022] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
The cardinal focus of this study is to optimize the best reaction conditions for maximizing laccase activity from spent mushroom waste (SMW) of Pleurotus florida. Optimization process parameters were studied by the modeling techniques, artificial neural networking (ANN) embedded in particle swarm optimization (PSO), and response surface model (RSM). The best topology of ANN-PSO architecture was obtained on 4-10-1. The R2, IOA, MSE, and MAE values of the ANN model were obtained as 0.98785, 0.9939, 0.0023, and 0.0251 while, that of the RSM model were obtained as 0.74290, 0.9210, 0.0244, and 0.1110 respectively. The higher values of R2, IOA, and lower values of MSE and MAE of the ANN-PSO model depict that ANN-PSO outperformed compared to RSM and also verified the effectiveness of the ANN-PSO model. The ANN-PSO model performance demonstrates the robustness of the technique in optimizing laccase activity in SMW of P. florida. The optimization results revealed that pH 4.5, time 3 h, solid: solution ratio 1:5, and ABTS concentration of 1 mM was optimal for achieving maximum laccase activity at temperature 30 °C. The enzymatic activity of crude laccase enzyme was obtained as 1.185 U ml-1 without loss of enzyme activity. Additionally, crude laccase enzyme was 1.74 fold partially purified, and 83.54% of the enzyme was yielded. Out of all the independent process variables, ABTS and pH had an influence on laccase activity. Therefore, we anticipate that the findings of this investigation will reduce the ambiguity in maximizing laccase activity and ease the screening process. This study also highlights the comparative cost evaluation of crude laccase enzyme extracted from P. florida and commercial enzymes. There is a great potential for the utilization of the laccase enzyme extracted from SMW and using it for the degradation of recalcitrant micropollutants. Thus, SMW promises a cost-effective and sustainable approach leading towards circular economy.
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Affiliation(s)
- Anamika Ghose
- Agro-ecotechnology Laboratory, School of Agro and Rural Technology (SART), Indian Institute of Technology Guwahati (IITG), Assam, 781039, India
| | - Debaditya Gupta
- Agro-ecotechnology Laboratory, School of Agro and Rural Technology (SART), Indian Institute of Technology Guwahati (IITG), Assam, 781039, India
| | - V Nuzelu
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Assam, 781039, India
| | - Latha Rangan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Assam, 781039, India
| | - Sudip Mitra
- Agro-ecotechnology Laboratory, School of Agro and Rural Technology (SART), Indian Institute of Technology Guwahati (IITG), Assam, 781039, India.
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Alvarez A, Killian M, Pietra B, Ahmed M, Peek G, Jacobs J, Bleiweis M, Fricker F, Gupta D. Impact of Donor Hypernatremia on Outcomes after Heart Transplantation in Adult and Pediatric Patients. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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4
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Magua W, Okoh A, Pranav P, Wang J, Karadkhele G, Cole R, Daneshmand M, Gupta D, Larsen C, Morris A. Belatacept-Based Immunosuppression in Heart Transplant Recipients: National Trends with Outcomes from a Single Center. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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5
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Eichenberger E, Satola S, Gupta D, Pouch S. Bloodstream Infection in Pre-Heart Transplant Patients on Temporary Mechanical Circulatory Support. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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6
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Patel K, Yadalam A, DeStefano R, Almuwaqqat Z, Desai S, Alkhoder A, Ejaz K, Alvi Z, Book W, Gupta D, Quyyumi A. Lipoprotein(a) Levels Predict Development of Cardiac Allograft Vasculopathy. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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7
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Killian M, Schelbe L, Lustria M, Gupta D. In-App Messaging by Adolescent Heart Transplant Patients During Mobile App-Based Video Directly Observed Therapy. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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8
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McLendon L, Kaufmann E, Killian M, Beckwith S, Coppola J, Martin E, Rackley J, Coleman L, Blanchette H, Shih R, Pietra B, Fricker F, Gupta D. Pediatric Psychosocial Assessment Tool: An Initial Risk Assessment Tool for Pediatric Heart Transplant Candidates. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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9
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Killian M, Tian S, Xing A, Gupta D, He Z. Predicting Health Outcomes Using Machine Learning in Pediatric Heart Transplantation Using UNOS Data. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Granstedt EM, Osin D, Gupta D, Kinley J, Knapp K, Muñoz-Burgos JM. Helium line ratio imaging in the C-2W divertor. Rev Sci Instrum 2022; 93:113533. [PMID: 36461464 DOI: 10.1063/5.0101822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 10/10/2022] [Indexed: 06/17/2023]
Abstract
A 2D imaging instrument has been designed and deployed on C-2W ("Norman") [H. Gota et al., Nucl. Fusion 61, 106039 (2021)] to study the plasma in the expander divertor by simultaneously measuring three neutral helium spectral lines. Ratios of these images, in conjunction with a collisional-radiative model, yield 2D maps of electron temperature and density. Almost the entire radial plasma cross-section (∼60 cm) can be mapped with a spatial resolution ≲1 cm. These data can, in principle, be acquired at 3 kHz. The neutral helium target is provided by a custom-built supersonic gas injector located inside the divertor vessel, which injects helium toward the magnetic axis and perpendicular to the camera sight-cone. Images of helium emission and reconstructed electron density and temperature profiles of the plasma produced from an end gun are presented. Voltages applied to concentric annular electrodes located in the divertors are used to stabilize beam-driven field reversed configuration plasmas. Magnetic field expansion is also employed to thermally isolate electrons from the end electrodes. Measurements of electron temperature and density in the divertor are important in order to study the effects of both the electrostatic biasing and the divertor magnetic field on electron confinement, neutral gas transport, and the overall machine performance.
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Affiliation(s)
- E M Granstedt
- TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA
| | - D Osin
- TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA
| | - D Gupta
- TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA
| | - J Kinley
- TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA
| | - K Knapp
- TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA
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Gupta D, Gujre N, Singha S, Mitra S. Role of existing and emerging technologies in advancing climate-smart agriculture through modeling: A review. ECOL INFORM 2022. [DOI: 10.1016/j.ecoinf.2022.101805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Charan K, Sharma N, Baksi A, Banerjee N, Rodha M, Gupta D. OC-003 PORT POSITIONS IN TEP FOR SHORT PATIENTS: OUR EXPERIENCE. Br J Surg 2022. [DOI: 10.1093/bjs/znac308.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Introduction
Totally extraperitoneal repair (TEP) is a popular technique for repair of inguinal hernia. One common technique of TEP involves placement of one 10 mm port 1–2 cm below the umbilicus just off the midline, one 5 mm port 2–3 cm above the pubic symphysis, and a third 5 mm port between these 2 ports in the midline (Figure 1a). In case the distance from the superior border of the symphysis pubis to the inferior edge of the umbilicus is less than 15 cm, this leads to crowding of instruments and results in ergonomic problems during the operation. Daes has popularized eTEP for this indication. The aim is to shift the first 10 mm port to a position 5 cm superior and 4 cm lateral to the umbilicus (Figure 1b). eTEP has also found application in the repair of ventral hernias. However, for most inguinal hernias, we feel that eTEP is an overkill.
Methods
We place the first 10 mm port at the level of the superior border of the umbilicus and just lateral to it (Figure 1c). The two 5 mm ports are placed in the midline. Initial dissection is performed telescopically.
Results
This technique provides 2–3 cm of extra working space, which improves ergonomics while operating on patients with a short pubo-umbilical distance. Other parameters like operating time, postoperative pain and other complications remain the same.
Conclusion
We recommend placement of the 10 mm port at the superior border of the umbilicus, particularly in short patients.
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Affiliation(s)
- K Charan
- General Surgery , AIIMS Jodhpur, Jodhpur , India
| | - N Sharma
- General Surgery , AIIMS Jodhpur, Jodhpur , India
| | - A Baksi
- General Surgery , AIIMS Jodhpur, Jodhpur , India
| | - N Banerjee
- General Surgery , AIIMS Jodhpur, Jodhpur , India
| | - M Rodha
- General Surgery , AIIMS Jodhpur, Jodhpur , India
| | - D Gupta
- General Surgery , AIIMS Jodhpur, Jodhpur , India
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Rodha MS, Gupta D. P-011 FEASIBILITY OF VENTRAL-TAPP FOR VENTRAL HERNIA REPAIR IN A LOW INCOME COUNTRY LIKE INDIA. Br J Surg 2022. [DOI: 10.1093/bjs/znac308.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Aim
Minimal invasive repair is now the established procedure for ventral hernia. Surgeons are now validating newer techniques each year to deal with the ventral hernia. It becomes difficult to choose, best fit technique from this large armamentarium. For a low income country like India, ventral- trans abdominal preperitoneal (TAPP) technique is cost effective and uses simple polyester or polypropylene mesh.
Methods
For this article we used our experience with ventral-TAPP performed from July 1, 2021 to May 31, 2022. Patients were followed up for 6 months.
Results
In the above time period, we had performed 10 ventral-TAPP. Out of these, 3 had completed the follow up. Median age was 45.0 years, BMI was 26.56 kg/m2. One patient was male (33.33%). All patients were presented to surgery due to bulge or pain in the anterior abdominal wall.
The median hernia defect measured 80 mm, median mesh diameter was 15 cm and median operative time was 125 min. No intraoperative complications occurred.
Postoperatively, none of the patients developed complications. Length of hospital stay was 3.0 days. Six months after surgery, neither recurrence nor chronic pain were recorded.
Conclusion
We have concluded that mesh used in repair with ventral-TAPP costs one fourth to one-fifth to that of composite mesh used in intraperitoneal onlay mesh (IPOM) repair with the comparable results. So in a low income country like India, ventral TAPP should be a preferred approach.
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Affiliation(s)
- M S Rodha
- Of General Surgery, All India Institute Of Medical Sciences , Jodhpur , India
| | - D Gupta
- Of General Surgery, All India Institute Of Medical Sciences , Jodhpur , India
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Spevack E, Gupta D, Moran A, Watkins K, Seeley N. The impact of an integrative medicine program on ERAS-compliant pancreaticoduodenectomies. Clin Nutr ESPEN 2022. [DOI: 10.1016/j.clnesp.2022.06.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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15
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Yap T, Konstantinopoulos P, Grisham R, Gupta D, Wilkinson G, Cao A, Jeffers M, Sharma N. 494TiP Phase Ib study of elimusertib (ATRi; BAY 1895344) in combination with niraparib (PARPi) in patients with advanced solid tumors. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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16
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Ali SM, Gupta D, Kundalia K, Saha SK, Tengblad O, Ovejas JD, Perea A, Martel I, Cederkall J, Park J, Szwec S. Resonance Excitations in ^{7}Be(d,p)^{8}Be^{*} to Address the Cosmological Lithium Problem. Phys Rev Lett 2022; 128:252701. [PMID: 35802450 DOI: 10.1103/physrevlett.128.252701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 04/26/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
The anomaly in lithium abundance is a well-known unresolved problem in nuclear astrophysics. A recent revisit to the problem tried the avenue of resonance enhancement to account for the primordial ^{7}Li abundance in standard big-bang nucleosynthesis. Prior measurements of the ^{7}Be(d,p)^{8}Be^{*} reaction could not account for the individual contributions of the different excited states involved, particularly at higher energies close to the Q value of the reaction. We carried out an experiment at HIE-ISOLDE, CERN to study this reaction at E_{c.m.}=7.8 MeV, populating excitations up to 22 MeV in ^{8}Be for the first time. The angular distributions of the several excited states have been measured and the contributions of the higher excited states in the total cross section at the relevant big-bang energies were obtained by extrapolation to the Gamow window using the talys code. The results show that by including the contribution of the 16.63 MeV state, the maximum value of the total S factor inside the Gamow window comes out to be 167 MeV b as compared to earlier estimate of 100 MeV b. However, this still does not account for the lithium discrepancy.
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Affiliation(s)
- Sk M Ali
- Department of Physics, Bose Institute, 93/1 APC Road, Kolkata 700009, India
| | - D Gupta
- Department of Physics, Bose Institute, 93/1 APC Road, Kolkata 700009, India
| | - K Kundalia
- Department of Physics, Bose Institute, 93/1 APC Road, Kolkata 700009, India
| | - Swapan K Saha
- Department of Physics, Bose Institute, 93/1 APC Road, Kolkata 700009, India
| | - O Tengblad
- Instituto de Estructura de la Materia-CSIC, Serrano 113 bis, ES-28006 Madrid, Spain
| | - J D Ovejas
- Instituto de Estructura de la Materia-CSIC, Serrano 113 bis, ES-28006 Madrid, Spain
| | - A Perea
- Instituto de Estructura de la Materia-CSIC, Serrano 113 bis, ES-28006 Madrid, Spain
| | - I Martel
- University of Huelva, Avenida Fuerzas Armadas sin numero Campus "El Carmen", 21007 Huelva, Spain
| | - J Cederkall
- Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden
| | - J Park
- Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden
| | - S Szwec
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, FI-40014 Jyväskylä, Finland
- Helsinki Institute of Physics, University of Helsinki, FIN-00014 Helsinki, Finland
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Khanra D, Calvert P, Wright P, Hughes S, Mahida S, Hall M, Todd D, Gupta D, Luther V. Differentiating border-zone tissue from post-infarct scar using ripple mapping during VT ablation. Europace 2022. [DOI: 10.1093/europace/euac053.352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background
Areas of post-infarct ventricular scar and border-zone slow conduction are often highlighted on a bipolar voltage map with generalized values 0.5mV–1.5mV. The true voltage that differentiates regions of conducting from non-conducting tissue is unknown. Ripple Mapping (RM)displays allows conducting tissue to be seen as areas supporting Ripple activation, and non-conducting tissue as areas devoid of Ripple activation.
Purpose
We describe application of Ripple Maps to differentiate areas of scar from conducting tissue during ischemic VT ablation.
Methods
Dense bipolar voltage maps were created (Pentaray catheter, pacing 80-100bpm) and presented as a single value (e.g. 0.5mV-0.5mV) to binarize the color display (red and purple). RMs were superimposed on the voltage map and played above a pre-set noise threshold (>0.05mV). The voltage map mV limit was sequentially reduced ("border-zone threshold") until only those areas devoid of Ripple bars appeared red. The surrounding border-zone supporting ripple activation thus appeared purple. We performed off-line analysis of border-zone voltage thresholds from a series of RM guided VT ablations.
Results
10 consecutive patients (LVEF 32.3±7.5%) with remote myocardial infarction underwent VT ablation (median 19days (IQR 8-33) since last VT). Bipolar voltage mapping (5873±2841 points, median shell area 224cm2), revealed voltages<0.5mV covered a median 11% (IQR 7-17%) of the shell. The border-zone voltage threshold was median 0.2mV (range 0.12mV - 0.3mV). Non-conducting tissue below this value covered only median 5% (IQR 3-7%) of the entire shell. VT was mappable in 4 patients, and the isthmus was bordered by tissue below the same border-zone threshold as found in normal rhythm. The border-zone was homogenized with ablation(40-50W, median 29 mins (IQR 22-33), and clinical VT was non-inducible in all, and 9 pts (91%) remain sustained VT-free at median 90-day follow-up (IQR 23-139), 2-weeks blanking period).
Picture 1 presents an infero-lateral LV infarct collected in an RV paced rhythm (7340points) and displayed at conventional bipolar voltage settings 0.5-1.5mV. Tissue with voltages<0.5mV appear red and cover 30% of the total area. In this case, this border-zone voltage threshold was defined as 0.25mV. Non-conducting tissue, seen as areas devoid of ripple bars below this value, now appeared as red, and covered only 11% of the total area. Picture 2 demonstrates the morphologies of 4 poorly tolerated induced VTs during this case. Each had near perfect pacemaps to the exit sites of border-zone tissue defined using this approach, and were targets for ablation resulting in complete non-inducibility and no VT recurrence in early follow-up.
Conclusion
The bipolar voltage that differentiates putative scar from bordering conducting tissue is unique to each patient, and far lower than 0.5mV-1.5mV. RM presents a practical approach to visualize the border-zone activation to guide ablation.
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Affiliation(s)
- D Khanra
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - P Calvert
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - P Wright
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - S Hughes
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - S Mahida
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - M Hall
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - D Todd
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - D Gupta
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - V Luther
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
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Bost J, Gupta D, El Andaloussi S, Saher O. Exosomes/EVs: GROWTH MEDIA CONDITIONS INFLUENCE THE SECRETION ROUTE AND RELEASE LEVELS OF ENGINEERED EXTRACELLULAR VESICLES. Cytotherapy 2022. [DOI: 10.1016/s1465-3249(22)00276-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Patel P, Bhatia-Patel S, Sykalo C, Thigpen C, Adams A, Egolum U, Howard B, Gupta D. Warfarin Discontinuation in Patients with HeartMate3 Left Ventricular Assist Device. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Gupta D, Clifford S, Skivington G, Kimbro A, Rackley J, Martin E, Pietra B, Fricker F, Killian M. Acceptability of Mobile Directly Observed Therapy for Immunosuppression Medication Adherence in Adolescent Heart Transplant Recipients. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Yadalam A, Yoo B, Bhatia-Patel S, Patel P, Laskar S, Bhatt K, Gupta D. Successful Pregnancy with HeartMate 3 (Abbott) Left Ventricular Assist Device. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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22
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Gupta D, Cantor R, Zhao H, Clifford S, Bansal N, Hope K, Albers E, Prada-Ruiz A, Reinhardt Z, Sorabella R, Kirklin J, Ramakrishnan K. Use of Donor Hearts with Low Ejection Fraction in Pediatric Heart Transplantation: A PHTS Analysis. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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BhatiaPatel S, Raj L, Yoo B, Patel P, Nicholson W, Daneshmand M, Abdou M, Gupta D. Cardiogenic Shock Following Successful CTO Revascularization. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Tadros H, Saidi A, Black E, Cattier C, Rackley J, Kimbro A, Clifford S, Martin E, Pietra B, Fricker F, Gupta D. End-of-life Decision Making In Pediatric Heart Transplant Families: A Study Analyzing The Parental Perspective. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Coppola J, Gupta D, Lopez-Colon D, DeGroff C, Vyas H. Elevated Aortic Stiffness After Pediatric Heart Transplantation. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Krishnamurti L, Gupta D. Hematopoietic stem cell transplantation for hemoglobinopathies: Progress and prospects. Indian J Med Paediatr Oncol 2022. [DOI: 10.4103/0971-5851.51444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
AbstractAllogeneic bone marrow transplantation from an HLA-identical donor is currently the only means of curing thalassemia . Transplant outcome depends upon the presence of risk factors (hepatomegaly, portal fibrosis and poor quality of chelation). patients are defined to have class I - if no risk factor, class II with one or two and class III - if all three risk factors are present. For patients under 16 years of age, for class I, class II and III the probabilities of survival are approximately 95%, >80% and 60-70%, respectively. The risk of transplant related morbidity& mortality is low when transplant is done at an early age. Currently, busulfan, cyclophospahmide and antithymocyte globulin based combination is used for conditioning. More than 200 patients with sickle cell disease (SCD) have undergone allogeneic SCT with long term survival in >80% of patients. Results are better if donor is an HLA-identical sibling and if transplant is done early in the course of disease. Presently, experience with reduced intensity SCT and matched unrelated donor transplant is limited to recommend their routine use.
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Affiliation(s)
- Lakshmanan Krishnamurti
- Department of Comprehensive Hemoglobinopathies Program Division of Hematology/Oncology/BMT Children′s Hospital of Pittsburgh 3705 Fifth Avenue, Pittsburgh, PA 15213, India
| | - D Gupta
- Department of Comprehensive Hemoglobinopathies Program Division of Hematology/Oncology/BMT Children′s Hospital of Pittsburgh 3705 Fifth Avenue, Pittsburgh, PA 15213, India
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Gujre N, Mitra S, Agnihotri R, Sharma MP, Gupta D. Novel agrotechnological intervention for soil amendment through areca nut husk biochar in conjunction with vetiver grass. Chemosphere 2022; 287:132443. [PMID: 34606895 DOI: 10.1016/j.chemosphere.2021.132443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 09/19/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Soil quality management through effective utilization of agricultural residue is the cynosure of intense global research. Therefore, we have explored the pyrolytic conversion of a locally available agricultural residue, the areca nut husk (AH), into biochar (BC) as a sustainable option towards residue management. The AH was carbonized at 250-400 °C, and residence times of 30-90 min. Subsequent detailed analysis revealed areca nut husk biochar (AHBC) formed at 250 °C with 60 min residence time, had the highest soil organic matter yield index (SOMYI), the lowest H/C and O/C ratio, and an average particle size of 1191.6 nm. Further characterization exposed the highly porous structure of prepared AHBC with oxygenated functional groups attached to its surface. The application of AHBC in conjunction with vetiver (Chrysopogon zizanioides L.) was used as a novel agrotechnological approach to assess soil quality improvement. Various doses of AHBC (5 t ha-1, 10 t ha-1, and 15 t ha-1) were applied in the experimental soils, and the principal component analysis (PCA) revealed that the 15 t ha-1 dose was optimum for the growth of the vetiver. AHBC amendment in soil resulted in increase of plant height and relative water content. This could be attributed to the increase in organic carbon, cation exchange capacity, and nutrients in the soil. Application of AHBC along with vetiver could be a simple, yet effective option, for sustainable agricultural residue and soil management.
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Affiliation(s)
- Nihal Gujre
- Agro-ecotechnology Lab, School of Agro and Rural Technology, Indian Institute of Technology Guwahati (IITG), Assam, 781039, India
| | - Sudip Mitra
- Agro-ecotechnology Lab, School of Agro and Rural Technology, Indian Institute of Technology Guwahati (IITG), Assam, 781039, India.
| | - Richa Agnihotri
- ICAR- Indian Institute of Soybean Research, Khandwa Road, Indore, Madhya Pradesh, 452001, India
| | - Mahaveer P Sharma
- ICAR- Indian Institute of Soybean Research, Khandwa Road, Indore, Madhya Pradesh, 452001, India
| | - Debaditya Gupta
- Agro-ecotechnology Lab, School of Agro and Rural Technology, Indian Institute of Technology Guwahati (IITG), Assam, 781039, India
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Koyyala V, Chandra S, Goel V, Pasricha S, Gupta M, Muppalla B, Vanapala K, Gupta S, Gupta D, Sen S, Srinivasulu V, Medisetty P, Patnaik R. 76P Need for awareness about immune-related adverse events (iRAEs) among community physicians in India. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.10.094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Pandey R, Batra R, Dhaigude P, Gupta D. Primitive neuroectodermal tumor of the kidney: a rare case. Afr J Urol 2021. [DOI: 10.1186/s12301-021-00138-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Primitive neuroectodermal tumor commonly occurs in bones and is equivalent to Ewing’s sarcoma. Very few cases have been reported in the literature and they had a very different presentation and very aggressive behavior.
Case presentation
We present a case of a young 23-year-old male who presented with complaints of pain in left lumbar region of abdomen since 8 months and hematuria off and on. CT scan of the abdomen was done which revealed a large heterogeneously enhancing mass lesion in the left lumbar region arising from the superior and mid-pole of left kidney showing multiple non-enhancing necrotic areas. A diagnosis of left renal cell carcinoma was kept. Through the transperitoneal approach, the left kidney was approached and a left radical nephrectomy was done. The histopathology report revealed the tumor cells to be positive for CD99 and focally positive for Vimentin and negative for cytokeratin thereby making a diagnosis of primary neuroectodermal tumor (PNET).
Conclusions
Renal PNET is a rare renal malignancy that should be kept in the differential diagnosis of a renal SOL especially when it is a presenting feature in adolescent and young adult. It has a very aggressive course and multimodal therapy has to be considered in its treatment
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Ramaswami A, Sahu AK, Kumar A, Suresh S, Nair A, Gupta D, Chouhan R, Bhat R, Mathew R, Majeed JA, Aggarwal P, Nayer J, Ekka M, Thakar A, Singh G, Xess I, Wig N. COVID-19-associated mucormycosis presenting to the Emergency Department-an observational study of 70 patients. QJM 2021; 114:464-470. [PMID: 34254132 PMCID: PMC8420631 DOI: 10.1093/qjmed/hcab190] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Mucormycosis (MM) is a deadly opportunistic fungal infection and a large surge in COVID-19-associated mucormycosis (CAM) is occurring in India. AIM Our aim was to delineate the clinico-epidemiological profile and identify risk factors of CAM patients presenting to the Emergency Department (ED). DESIGN This was a retrospective, single-centre, observational study. METHODS We included patients who presented with clinical features or diagnosed MM and who were previously treated for COVID-19 in last 3 months of presentation (recent COVID-19) or currently being treated for COVID-19 (active COVID-19). Information regarding clinical features of CAM, possible risk factors, examination findings, diagnostic workup including imaging and treatment details were collected. RESULTS Seventy CAM patients (median age: 44.5 years, 60% males) with active (75.7%) or recent COVID-19 (24.3%) who presented to the ED in between 6 May 2021 and 1 June 2021, were included. A median duration of 20 days (interquartile range: 13.5-25) was present between the onset of COVID-19 symptoms and the onset of CAM symptoms. Ninety-three percent patients had at least one risk factor. Most common risk factors were diabetes mellitus (70%) and steroid use for COVID-19 disease (70%). After clinical, microbiological and radiological workup, final diagnosis of rhino-orbital CAM was made in most patients (68.6%). Systemic antifungals were started in the ED and urgent surgical debridement was planned. CONCLUSION COVID-19 infection along with its medical management have increased patient susceptibility to MM.
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Affiliation(s)
- A Ramaswami
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - A K Sahu
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - A Kumar
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - S Suresh
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - A Nair
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - D Gupta
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - R Chouhan
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - R Bhat
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - R Mathew
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - J A Majeed
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - P Aggarwal
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - J Nayer
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - M Ekka
- Department of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - A Thakar
- Department of Otorhinolaryngology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - G Singh
- Department of Microbiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - I Xess
- Department of Microbiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
| | - N Wig
- Department of Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India
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Hermans ANL, Gawalko M, Van Der Velden RMJ, Verhaert DVM, Betz K, Hemels MEW, Steven D, Duncker D, Gupta D, Manninger M, Lodzinski P, Crijns HJGM, Pluymaekers NAHA, Hendriks JM, Linz D. Evaluation of the feasibility and accuracy of remote mobile app-based self-reported atrial fibrillation risk factor assessment in patients with atrial fibrillation: TeleCheck-AF results. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.3095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Previously, we introduced the TeleCheck-AF approach, which is an on-demand mobile health (mHealth) infrastructure incorporating mobile app-based heart rate and rhythm monitoring as well as mobile app-based self-reported atrial fibrillation (AF) risk factor assessment to allow comprehensive remote AF management through teleconsultation. Herein, we evaluated the feasibility and accuracy of remote mobile app-based self-reported AF risk factor assessment in AF patients.
Methods
In our University Medical Center, 545 patients were managed within the TeleCheck-AF project by an on-demand heart rate and rhythm mHealth infrastructure through teleconsultation. Patients were asked to fill in a short mobile app-based 10-item questionnaire related to AF risk factors. A reminder to complete the questionnaire automatically popped-up after the following four heart rate and rhythm recordings. Furthermore, patient's medical history was retrieved from the electronic health records (EHRs).
Results
Out of 545 patients, 542 (99.4%) patients (217 female, age 67 (59–72) years) completed the mobile app-based 10-item questionnaire and were included in this analysis. The number of patients with diabetes mellitus was similar in the EHRs and mobile app-based questionnaire (both 11.3%, p=1.000). There was no significant difference in the number of patients who had a medical history of transient ischemic attack (TIA)/cerebrovascular accident (CVA) and artery disease (coronary artery disease and peripheral artery disease) in the EHRs and mobile app-based questionnaire (11.4% vs 12.2%, p=0.608 and 14.8% vs 13.3%, p=0.366, respectively). Heart failure was more frequently reported in the mobile app-based questionnaire compared to the EHRs (33.4% vs 14.0%, p<0.001). A total of 260 (48.0%) patients had a diagnosis of hypertension verified in EHRs and only 239 (44.1%) patients reported hypertension in the mobile app-based questionnaire (p=0.044). There was no significant difference in number of patients with CHA2DS2-VASc-score ≥2 between the EHRs and mobile app-based questionnaire (64.2% vs 66.1%, p=0.275). The accuracy of mobile app-based assessment of diabetes mellitus was 85.4%, of TIA/CVA 78.9%, of artery disease 60.9%, of heart failure 78.8%, and of hypertension 89.3%.
Conclusion
Patient self-reported AF risk factors by a remote mobile app-based assessment is feasible and may be useful for future digital trials and comprehensive remote AF management through teleconsultation.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- A N L Hermans
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - M Gawalko
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | | | - D V M Verhaert
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - K Betz
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | | | - D Steven
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - D Duncker
- Hannover Heart Center, Hannover, Germany
| | - D Gupta
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom
| | | | - P Lodzinski
- Medical University of Warsaw, Warsaw, Poland
| | - H J G M Crijns
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | | | | | - D Linz
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
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Chase D, Perhanidis J, Gupta D, Kalilani L, Lechpammer S, Woodward T, González-Martín A. 742P Survival in patients (pts) with advanced ovarian cancer (AOC) changes with cumulative number of risk factors (RFs): A US real-world (RW) analysis. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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33
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Nations M, Gupta D, Sweeney J, Frausto L, Tobin M. Publisher's Note: "Measurements of impurity ion temperature and velocity distributions via active charge-exchange recombination spectroscopy in C-2W" [Rev. Sci. Instrum. 92, 053512 (2021)]. Rev Sci Instrum 2021; 92:069901. [PMID: 34243518 DOI: 10.1063/5.0056405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Indexed: 06/13/2023]
Affiliation(s)
- M Nations
- TAE Technologies, Rancho Santa Margarita, California 92688, USA
| | - D Gupta
- TAE Technologies, Rancho Santa Margarita, California 92688, USA
| | - J Sweeney
- TAE Technologies, Rancho Santa Margarita, California 92688, USA
| | - L Frausto
- TAE Technologies, Rancho Santa Margarita, California 92688, USA
| | - M Tobin
- TAE Technologies, Rancho Santa Margarita, California 92688, USA
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Karim N, Kozhuharov N, Jarman J, Furniss S, Veasey R, Ullah W, Vouliotis AI, Martin C, Kalla M, Osmanagic A, Ginks M, Pope M, Christian Sitcherling C, Gupta D, Wong T. Safety and acute clinical outcomes of atrial fibrillation catheter ablation in octogenarians: a multicentre evaluation with a matched younger cohort. Europace 2021. [DOI: 10.1093/europace/euab116.235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
OnBehalf
Sven Knecht and the International Octogenarian AF ablation group
Background
Octogenarians are a fast-growing demographic with a high burden of atrial fibrillation (AF). There are limited data on procedural safety and acute outcomes of catheter ablation (CA) for AF in this group.
Purpose
Investigation of complications & outcomes in octogenarians undergoing CA for AF.
Methods
Data on all octogenarian patients who underwent AF ablation at nine European cardiology centres between 2013 and 2019 were retrospectively analysed and matched with control patients aged <80 years. The characteristics used for matching were type of AF, type of procedure (de novo or redo), & the year of procedure.
Results
216 octogenarians (81.9 ± 1.9 years; 52.8% females) underwent an AF ablation procedure, and were matched with 216 patients aged <80 years (62.4 ± 9.5 years, 34.7% females), p <0.001 for both. The proportion of paroxysmal and persistent AF was 43.5% & 56.5% respectively in both groups, and 79.3% of the procedures were de novo. RF ablation made up 75.4% & 75.9% (p = 0.90) procedures in octogenarians and controls respectively. 17 complications occurred in 14 (7.9%) octogenarian patients and 11 in 11 (5.1%) patients in the younger matched cohort (p = 0.07). There were 4.2% & 1.9% major complications (p= 0.17) and 3.7% & 3.2% minor complications (p= 0.77) in the octogenarian & younger cohorts respectively. Complications in octogenarians consisted of groin complications (n = 6), pneumonia (n = 3), pericardial effusion (n = 2), phrenic nerve injury (n = 2), pulmonary oedema (n = 1), gastroparesis (n = 1), stroke (n = 1). Acute procedural success rates were 99.1% & 99.5% (p = 0.62) The complication rates were similar for RF; 6.0% vs 5.4% (p = 0.79) and Cryoballoon; 14.0% vs 4.1% (p = 0.09) in both octogenarians and younger cohort respectively.
Conclusion
In spite of significantly higher overall risk profile of octogenarians undergoing AF ablation, there is no difference in acute procedural success and complication rates as compared to younger patients Catheter ablation of AF in octogenerians Octogenarians n = 216 Matched Controls (aged < 80yrs) n = 216 P value Age (yrs), mean (SD)s 81.9 (1.9) 62.4(9.5) < 0.0001 Females, (%) 52.8 34.7 0.0002 CHA2DS2-VASc, mean (SD) 3.6 (1.2) 1.4 (1.3) < 0.0001 Mean LA size, mm 42.8 ± 8.3mm 45.8 ± 16.2 0.062 Impaired LV function, (%) 23.7 17.9 0.206 IHD, (%) 20.7 5.9 < 0.0001 Procedural time (mins), mean (sd) 150.6 (69.7) 148.9 (64.4) 0.914 All complications, n (%) 17 (7.9) 11 (5.1) 0.073
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Affiliation(s)
- N Karim
- Royal Brompton Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - N Kozhuharov
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - J Jarman
- Royal Brompton Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - S Furniss
- Eastbourne District General Hospital, Eastbourne, United Kingdom of Great Britain & Northern Ireland
| | - R Veasey
- Eastbourne District General Hospital, Eastbourne, United Kingdom of Great Britain & Northern Ireland
| | - W Ullah
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - A-I Vouliotis
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - C Martin
- Royal Papworth Hospital NHS Foundation Trust, Cambridge, United Kingdom of Great Britain & Northern Ireland
| | - M Kalla
- Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom of Great Britain & Northern Ireland
| | - A Osmanagic
- Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom of Great Britain & Northern Ireland
| | - M Ginks
- John Radcliffe Hospital, Oxford, United Kingdom of Great Britain & Northern Ireland
| | - M Pope
- John Radcliffe Hospital, Oxford, United Kingdom of Great Britain & Northern Ireland
| | | | - D Gupta
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - T Wong
- Royal Brompton Hospital, London, United Kingdom of Great Britain & Northern Ireland
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Linz D, Pluymaekers N, Duncker D, Manninger M, Van Der Velden R, Hermans A, Verhaert D, Hemels M, Sultan A, Gupta D, Heidbuchel H, Sohaib A, Svennberg E, Crijns H, Hendriks J. The TeleCheck-AF project on remote app-based management of atrial fibrillation during the COVID-19 pandemic: Patient experiences. Europace 2021. [PMCID: PMC8194565 DOI: 10.1093/europace/euab116.521] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Funding Acknowledgements OnBehalf Aims Methods Results Conclusions
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Affiliation(s)
- D Linz
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - N Pluymaekers
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - D Duncker
- Hannover Medical School, Cardiology, Hannover, Germany
| | - M Manninger
- Medical University of Graz, Cardiology, Graz, Austria
| | - R Van Der Velden
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - A Hermans
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - D Verhaert
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - M Hemels
- Rijnstate Hospital, Arnhem, Netherlands (The)
| | - A Sultan
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - D Gupta
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | | | - A Sohaib
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - E Svennberg
- Karolinska University Hospital, Stockholm, Sweden
| | - H Crijns
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - J Hendriks
- Flinders Medical Centre and Flinders University, Adelaide, Australia
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Tovmassian L, Bierme C, Kozhuharov N, Ding WY, Obeidat M, Chu G, O"brien J, Snowdon RL, Gupta D. Ablation Index-guided 50W ablation for left atrial posterior wall isolation compared with lower powers: feasibility and lesion level analysis. Europace 2021. [DOI: 10.1093/europace/euab116.224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Groupe de Rythmologie de la Société Française de Rythmologie
Background
Posterior Wall Isolation (PWI) is increasingly performed for Atrial Fibrillation (AF). The use of Ablation Index (AI)-guided 50W ablation for PWI has not been described, nor the interplay between ablation parameters at this power when compared to lower powers.
Methods
40 consecutive AF patients (26 males, 65.5 ± 10.0 years. 95% non-paroxysmal AF) underwent PWI following pulmonary vein isolation. A roof line and floor line were created with point-by-point ablation, targeting a contact force (CF) of 10-30g, AI 550-600 on the roof and 400-450 on the floor, and inter-tag distance of <6mm. 35-40W powers were used for the first 20 patients, and 50W used for the next 20. Generator impedance was monitored in real time for each lesion. Ablation inside the box was delivered in case of failure of first pass isolation (FPI). All VisiTags (n = 959) were analyzed retrospectively.
Results
PWI was successful in 19(95%) of the 35-40W group and in all 20 patients in the 50W group, with FPI seen in 8(40%) and 10(50%) respectively, p = 0.53. The mean CF and number of RF applications on the roof. floor and inside the box were similar between the two groups. Ablation time per lesion (10.4 [8.8-12.5]sec) and total ablation time per patient (3.84[3.34-4.66] min) were shorter in the 50W group as compared to 35-40W (13.0 [11.6-16.2] sec and 5.86 [4.23-7.73] min respectively), p < 0.005. The mean AI and Impedance Drop were larger in the 50W group (Table). There was no steam pop observed in any of the 959 radiofrequency applications.
Conclusion
Ablation Index guided 50W ablation has a very high success rate for posterior wall isolation with shorter ablation times and higher impedance drop compared to conventional powers. Steam pops may be avoidable by targeting CF < 30g, and by monitoring impedance in real-time. 50W Group(N = 458) 35-40W Group(N = 501) p-value Number of lesions (s, IQR)Roof lineFloor lineAdditional ablation inside box 21.5 [19.5-26.3]7.0 [5.8-9.0]13.0 [10.8-14.3]6.0 [6.0-6.8] 24.0 [20.8-29.5]8.0 [6.0-10.0]12.5 [10.8-14.0]5.5 [2.8-9.0] 0.330.180.850.59 Ablation Time per lesion (s, IQR)Roof lineFloor lineAdditional ablation inside box 10.4 [8.8-12.5]13.0 [10.9-16.0]9.9 [8.7-11.4]8.1 [6.9-9.0] 13.0 [11.6-16.2]14.5 [12.4-19.0]12.7 [11.4-15.9]11.8 [10.6-14.0] <0.005<0.005<0.005<0.005 Total RF Time (min, IQR)Roof lineFloor lineAdditional ablation inside box 3.84 [3.34-4.66]1.54 [1.15-1.90]2.06 [1.68-2.54]0.79 [0.65-1.07] 5.86 [4.23-7.73]1.98 [1.62-2.59]2.78 [2.28-3.25]1.07 [0.59-1.42] < 0.0050.0190.0090.50 Impedance Drop (ohms, IQR)Roof lineFloor lineAdditional ablation inside box 7.4 [5.2-10.3]8.7 [6.1-11.3]6.9 [5.0-10.1]7.1 [5.4-9.8] 6.9 [4.8-9.7]7.5 [5.1-10.0]6.0 [4.2-8.3]8.3 [5.8-10.9] 0.0070.04< 0.0050.17 Contact Force (g, IQR)Roof lineFloor lineAdditional ablation inside box 21.1 [14.5-30.3]23.9 [17.8-32.7]19.2 [13.2-25.3]25.5 [18.5-36.9] 21.2 [14.9-28.1]24.3 [17.2-30.3]19.0 [14.1-25.0]23.1 [16.9-31.7] 0.560.450.870.21 Ablation Index (IQR)Roof lineFloor lineAdditional ablation inside box 471 [441-519]560 [509-571]453 [436-475]461 [430-488] 461 [434-493]502 [466-541]446 [426-464]455 [434-478] < 0.005< 0.005< 0.0050.59 Lesion level analysis for Posterior Wall Isolation
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Affiliation(s)
- L Tovmassian
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - C Bierme
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - N Kozhuharov
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - WY Ding
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - M Obeidat
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - G Chu
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - J O"brien
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - RL Snowdon
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - D Gupta
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
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Linz D, Pluymaekers N, Hermans A, Van Der Velden R, Verhaert D, Gupta D, Steven D, Duncker D, Manninger M, Svennberg E, Heidbuchel H, Crijns H, Sahaib A, Tomlinson D, Hendriks J. Remote app-based management of atrial fibrillation during the COVID-19: The centre characteristics and experiences of the European TeleCheck-AF project. Europace 2021. [PMCID: PMC8194584 DOI: 10.1093/europace/euab116.522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Funding Acknowledgements Type of funding sources: None. OnBehalf TeleCheck-AF Investigators Aims Herein we describe the characteristics, inclusion rates and experiences from participating centres in the European TeleCheck-AF project. TeleCheck-AF is a multicentre international project initiated to maintain care delivery for patients with atrial fibrillation (AF) during COVID-19 through teleconsultations supported by an on-demand photoplethysmography-based heart rate and rhythm monitoring app (FibriCheck®). Methods Two surveys exploring centre characteristics (n = 25) and centre experiences (n = 23) were completed. Results Most centres were academic (64%) and specialized public cardiology/district hospitals (36%). Majority of centres had AF outpatient clinics (64%) and only 36% had AF ablation clinics. The time required to start patient inclusion and total number of included patients in the project was comparable for centres experienced (56%) or inexperienced in mHealth use. Within 28 weeks, 1930 AF patients were recruited, mainly for remote AF control (31% of patients) and AF ablation follow-up (42%). Average inclusion rate was highest during the lockdown restrictions and reached a steady state at a lower level after easing the restrictions (188 vs 52 weekly recruited patients). Majority (>80%) of the centres reported no problems during the implementation of the TeleCheck-AF approach. Centres agreed that the on-boarding process of their center in the TeleCheck-AF project was simple and access to the patients measurements via stand-alone cloud infrastructure was trouble-free and possible from the first day on. They also agreed that remote heart rate and rhythm assessment by the FibriCheck® app around teleconsulatation supported their medical decision making; that their patients responded positively to use FibriCheck® for seven days; and that they felt comfortable to interpret PPG recordings. Conclusions Despite different health care settings and mHealth experiences, the TeleCheck-AF approach could be set up within an extremely short time and easily used in different European centres during COVID-19.
Abstract Figure. ![]()
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Affiliation(s)
- D Linz
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - N Pluymaekers
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - A Hermans
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - R Van Der Velden
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - D Verhaert
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - D Gupta
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - D Steven
- Cologne University Hospital - Heart Center, Cologne, Germany
| | - D Duncker
- Hannover Medical School, Hannover, Germany
| | | | - E Svennberg
- Karolinska University Hospital, Stockholm, Sweden
| | | | - H Crijns
- Maastricht University Medical Centre (MUMC), Maastricht, Netherlands (The)
| | - A Sahaib
- Barts Heart Centre, London, United Kingdom of Great Britain & Northern Ireland
| | - D Tomlinson
- Plymouth Hospitals NHS Trust, Plymouth, United Kingdom of Great Britain & Northern Ireland
| | - J Hendriks
- Flinders Medical Centre and Flinders University, Adelaide, Australia
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Pius C, Ahmad H, Snowdon R, Ashrafi R, Waktare J, Borbas Z, Luther V, Mahida S, Modi S, Hall M, Gupta D, Todd D. Assessing atrial fibrillation ablation priority during COVID-19 -does use of patient questionnaires help in stratification above physician assessment? Europace 2021. [PMCID: PMC8194591 DOI: 10.1093/europace/euab116.292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Funding Acknowledgements Type of funding sources: None. Introduction Catheter ablation for atrial fibrillation (AF) is largely offered for symptomatic relief. The ORBIT registry has shown that patients with a higher EHRA class and lower quality of life (QoL) scores (AFEQT score <65.7) are more likely to suffer emergency hospital admissions. To help prevent unplanned AF admissions and to best utilise the reduced capacity for elective work during the COVID-19 pandemic, it has become even more important to prioritise the most symptomatic AF patients for ablation. Purpose: To evaluate the accuracy of a subjective symptom-based clinician prioritisation schema compared to objective patient-completed quality of life (QoL) scores. Methods: In July 2020, all elective cases awaiting AF ablation at our institution were categorised by their cardiologist as either category 1 (C1-urgent), category 2 (C2–priority, procedure to be done during the ongoing COVID-19 pandemic) or category 3 (C3–routine, procedure may be delayed until post pandemic). This categorisation was based on review of clinic letters where EHRA AF symptom class or PROMS are not routinely recorded. All patients in C2 and C3 were then posted an AF specific (AFEQT) and a generic (EQ5D) QoL questionnaire to complete. Physicians were blinded to patient responses on the QoL questionnaires. Results: Details of physician prioritisation and completed questionnaires were available for 85 patients (62 ± 10 years, PAF in 61%, males 66%). The 18 patients that had been categorised in C2 (priority) group were found to have a significantly lower AFEQT score (30.4, IQR 17.2-51.9) compared to the 67 patients classed in C3 (routine) group (56.5, IQR 32.1-74.1; p < 0.01)(Figure 1a). EQ5D scores also tended to be lower in the C2 patients (0.7, IQR 0.4-0.8) compared to C3 (0.8, IQR 0.6-0.9; p = 0.056) (Figure 1c). 16 (89%) patients in C2 had significant AF-related impact on QoL (as defined as AFEQT score <65.7) compared to 42 (63%) of patients in C3. However, there was significant overlap between groups (Figure 1b). 4 patients in C3 had unplanned AF related hospital admissions while awaiting ablation, as compared to none in C2. The median AFEQT score of these 4 patients was 23.3, indicating that they were highly symptomatic despite being classified in C3 by their cardiologist. Conclusion : Physician assessments are moderately accurate in prioritising patients awaiting AF ablation. The addition of formal patient-completed QoL assessment such as with AFEQT, helps to identify the most symptomatic patients at risk of emergency hospital admission, and physicians should consider using these as part of routine assessment, especially during the COVID pandemic.
Abstract Figure 1 ![]()
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Affiliation(s)
- C Pius
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - H Ahmad
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - R Snowdon
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - R Ashrafi
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - J Waktare
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - Z Borbas
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - V Luther
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - S Mahida
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - S Modi
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - M Hall
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - D Gupta
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
| | - D Todd
- Liverpool Heart and Chest Hospital, Liverpool, United Kingdom of Great Britain & Northern Ireland
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Kumar N, Gupta M, Gupta D, Tiwari S. Novel deep transfer learning model for COVID-19 patient detection using X-ray chest images. J Ambient Intell Humaniz Comput 2021; 14:469-478. [PMID: 34025813 PMCID: PMC8123104 DOI: 10.1007/s12652-021-03306-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 05/01/2021] [Indexed: 06/12/2023]
Abstract
Around the world, more than 250 countries are affected by the COVID-19 pandemic, which is caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This outbreak can be controlled only by the diagnosis of the COVID-19 infection in early stages. It is found that the radiographic images are ideal for the fastest diagnosis of COVID-19 infection. This paper proposes an ensemble model which detects the COVID-19 infection in the early stage with the use of chest X-ray images. The transfer learning enables to reuse the pretrained models. The ensemble learning integrates various transfer learning models, i.e., EfficientNet, GoogLeNet, and XceptionNet, to design the proposed model. These models can categorize patients as COVID-19 (+), pneumonia (+), tuberculosis (+), or healthy. The proposed model enhances the classifier's generalization ability for both binary and multiclass COVID-19 datasets. Two popular datasets are used to evaluate the performance of the proposed ensemble model. The comparative analysis validates that the proposed model outperforms the state-of-art models in terms of various performance metrics.
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Affiliation(s)
- N. Kumar
- Department of Computer Science & Engineering, Maharaja Surajmal Institute of Technology, C-4, Janakpuri, New Delhi, India
| | - M. Gupta
- Department of Computer Science & Engineering, Moradabad Institute of Technology, Moradabad, India
| | - D. Gupta
- Chitkara University Institute of Engineering and Technology, Chitkara University, Rajpura, Punjab India
| | - S. Tiwari
- Department of Computer Science and Engineering, Thapar Institute of Engineering and Technology, Patiala, India
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Datta A, Gujre N, Gupta D, Agnihotri R, Mitra S. Application of enzymes as a diagnostic tool for soils as affected by municipal solid wastes. J Environ Manage 2021; 286:112169. [PMID: 33621849 DOI: 10.1016/j.jenvman.2021.112169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 02/01/2021] [Accepted: 02/07/2021] [Indexed: 06/12/2023]
Abstract
Assessing the relationship between soil enzyme activities (SEAs) and heavy metals (HMs) without any amendment has rarely been conducted in soils contaminated with municipal solid wastes (MSW). Five soil enzymes [dehydrogenase (DHA), alkaline phosphatase (ALP), acid phosphatase (ACP), urease (UR), and nitrate reductase (NR)] have been assessed for HMs bioremediation using Zea mays L. grown in unamended soils that were contaminated with different types of MSW. Pot experiment was conducted for two seasons with soils collected from seven different locations within the MSW site. Experimental soil samples included a control (CA), contaminated by brick kiln wastes (SA1), kitchen and household wastes (SA2), medical wastes (SA3), mixed wastes (SA4), glass wastes (SA5), and metal scrap wastes (SA6). Rhizospheric soils were collected after the harvest of each season to investigate the impact of HMs on SEAs and physicochemical properties of soil. The results revealed an increase in DHA, ALP, and NR activities by 89.30%, 58.03% and 21.98% in SA1. Likewise, enhanced activities for UR (28.26%) and ACP (19.6%) were observed in SA3 and SA5 respectively. Insignificant increase in the macronutrients and organic carbon (OC) were also noted. The increased microbial count and the relatively higher amount of organic matter (OM) in the rhizosphere indicated the role of OM in HMs immobilization. Principal component analysis (PCA) indicated that DHA and NR are the important soil enzymes, underscored by their active involvement in the C and N turnover in the soil. Likewise, correlation analysis showed that DHA and NR activities were positively correlated with copper (Cu) (0.90, p < 0.01; 0.88, p < 0.01), suggesting its participation as a cofactor in enzymatic activities. In contrast, DHA was negatively correlated with cadmium (Cd) (-0.48, p < 0 0.05). Finally, these results indicated that in the absence of exogenous nutrient amendment, the SEAs were governed by OC, available nitrogen (Avl. N), Cu and Cd respectively. The study also highlighted the need for extensive research on SEAs for its utilization as a bioindicator in various soil bioremediation and quality management practices.
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Affiliation(s)
- Ankita Datta
- Agro-ecotechnology Laboratory, Centre for Rural Technology, Indian Institute of Technology Guwahati (IITG), North Guwahati, Assam, 781039, India
| | - Nihal Gujre
- Agro-ecotechnology Laboratory, Centre for Rural Technology, Indian Institute of Technology Guwahati (IITG), North Guwahati, Assam, 781039, India
| | - Debaditya Gupta
- Agro-ecotechnology Laboratory, Centre for Rural Technology, Indian Institute of Technology Guwahati (IITG), North Guwahati, Assam, 781039, India
| | - Richa Agnihotri
- ICAR-Indian Institute of Soybean Research, Khandwa Road, Indore, 452001, India
| | - Sudip Mitra
- Agro-ecotechnology Laboratory, Centre for Rural Technology, Indian Institute of Technology Guwahati (IITG), North Guwahati, Assam, 781039, India.
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Nations M, Gupta D, Sweeney J, Frausto L, Tobin M. Measurements of impurity ion temperature and velocity distributions via active charge-exchange recombination spectroscopy in C-2W. Rev Sci Instrum 2021; 92:053512. [PMID: 34243240 DOI: 10.1063/5.0043838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 04/07/2021] [Indexed: 06/13/2023]
Abstract
In TAE Technologies' C-2W experiment, electrode biasing is utilized for boundary control of a field-reversed configuration (FRC) plasma embedded in a magnetic mirror. Understanding the underlying physics associated with FRC rotation, stabilization, and heating is crucial for improving machine performance. Impurity ion rotation and temperature are sensitive to biasing effects, and measurements of these quantities can provide insight into important plasma dynamics and overall effectiveness of the biasing system. To this end, a charge-exchange recombination spectroscopy (ChERS) diagnostic was developed and deployed to measure local impurity ion temperature and velocity in the confinement vessel of C-2W. The system utilizes a new diagnostic neutral beam (40 keV, 8.5 A) and a fiber-coupled spectrometer with an image-intensified high-speed camera to measure beam-induced spectral line emission at multiple lines-of-sight. Design details and the first experimental results obtained with this new diagnostic are presented and discussed.
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Affiliation(s)
- M Nations
- TAE Technologies, Rancho Santa Margarita, California 92688, USA
| | - D Gupta
- TAE Technologies, Rancho Santa Margarita, California 92688, USA
| | - J Sweeney
- TAE Technologies, Rancho Santa Margarita, California 92688, USA
| | - L Frausto
- TAE Technologies, Rancho Santa Margarita, California 92688, USA
| | - M Tobin
- TAE Technologies, Rancho Santa Margarita, California 92688, USA
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42
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Schwartz A, Hu Y, Nayak A, Tannu M, Laskar S, Gupta D, Vega J, Morris A. The Stanford Integrated Psychosocial Assessment for Transplantation Score Predicts Frequency of Hospital Readmissions in Left Ventricular Assist Device Patients. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Sheftman D, Signorelli M, Gupta D. Measurement of E × B drift of impurities in the C-2W inner divertor using spatial heterodyne spectroscopy. Rev Sci Instrum 2021; 92:043541. [PMID: 34243420 DOI: 10.1063/5.0043832] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 04/02/2021] [Indexed: 06/13/2023]
Abstract
Edge control in the C-2W field-reversed configuration experiment is crucial for the stability and energy confinement of the core plasma. Such edge control is achieved by electrical biasing on the end-on electrode plates. The radial electric field generated by the electrode biasing can be measured by E × B induced drift of impurity ions. Spatial heterodyne spectroscopy (SHS) is a promising method of high light throughput spectroscopy. Doppler shifted spectra of O4+ ion emission lines have been measured using a novel, in-house built SHS system. The electric field in the jet plasma inside the inner divertor of C-2W was estimated using the temporal profile of the rotational velocity of the oxygen ions. SHS system details, obtained measurements, and the methods of improving the system performance will be discussed.
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Affiliation(s)
- D Sheftman
- TAE Technologies, Inc., P.O. Box 7010, Rancho Santa Margarita, California 92688-7010, USA
| | - M Signorelli
- TAE Technologies, Inc., P.O. Box 7010, Rancho Santa Margarita, California 92688-7010, USA
| | - D Gupta
- TAE Technologies, Inc., P.O. Box 7010, Rancho Santa Margarita, California 92688-7010, USA
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Granstedt EM, Gupta D, Sweeney J, Tobin M, Dikovsky M. Comprehensive imaging of C-2W plasmas: Instruments and applications. Rev Sci Instrum 2021; 92:043515. [PMID: 34243377 DOI: 10.1063/5.0043778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/15/2021] [Indexed: 06/13/2023]
Abstract
The C-2W device ("Norman") [Gota et al., Nucl. Fusion 59, 112009 (2019)] has produced and sustained beam-driven field-reversed configuration (FRC) plasmas embedded in a magnetic mirror geometry using neutral beams and end-bias electrodes located in expander divertors. Several discrete vessels comprise this device, and many imaging instruments are required in order to view the plasma throughout. To meet this need, a suite of spatially and radiometrically calibrated, high-speed camera systems have been deployed. Besides global visualization of the plasma evolution and macro-stability, this imaging suite has been used in a variety of applications. One example application is a tomographic reconstruction of passive impurity emission. Calculation of the magnetic field in the equilibrium vessel is complicated by eddy currents in conducting structures and internal currents in the high-β FRC plasma. In addition, thus far non-perturbative measurements of internal field have not been available. The tomographic reconstruction of O4+ impurity emission enables an independent visualization of the plasma geometry, serving as a check on magnetic modeling and indirect evidence for field reversal within the FRC. A second application uses the cameras to view the Balmer-α emission throughout the plasma in order to estimate the ionization rate in each region. These rates can then be incorporated into particle balance calculations and a circuit model for currents from the end-bias electrodes. Finally, arcing on the electrode surfaces is identified through automated image processing of carefully selected spectral line emission.
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Affiliation(s)
- E M Granstedt
- TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA
| | - D Gupta
- TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA
| | - J Sweeney
- TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA
| | - M Tobin
- TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA
| | - M Dikovsky
- Google, Inc., 1600 Amphitheatre Parkway, Mountain View, California 94043, USA
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Bajpai J, Majumdar A, Satwik R, Rohatgi N, Jain V, Gupta D, Agarwal R, Mittal S, Verma SK, Parikh PM, Aggarwal S. Practical consensus recommendations on fertility preservation in patients with breast cancer. South Asian J Cancer 2020; 7:110-114. [PMID: 29721475 PMCID: PMC5909286 DOI: 10.4103/sajc.sajc_113_18] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Young women diagnosed with cancer today have a greater chance of long-term survival than ever before. Successful survivorship for this group of patients includes maintaining a high quality of life after a cancer diagnosis and treatment; however, lifesaving treatments such as chemotherapy, radiation, and surgery can impact survivors by impairing reproductive and endocrine health. Expert oncologists along with reproductive medicine specialists discuss fertility preservation options in this chapter since fertility preservation is becoming a priority for young women with breast cancer. This expert group used data from published literature, practical experience and opinion of a large group of academic oncologists to arrive at these practical consensus recommendations for the benefit of community oncologists.
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Affiliation(s)
- Jyoti Bajpai
- Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - A Majumdar
- Center of IVF and Human Reproduction, Sir Gangaram Hospital, New Delhi, India
| | - R Satwik
- Center of IVF and Human Reproduction, Sir Gangaram Hospital, New Delhi, India
| | - N Rohatgi
- Department of Medical Oncology, Max Saket Hospital, New Delhi, India
| | - V Jain
- Department of Gynaecology and Obstretics, Ludhiana Medicity Hospital, Ludhiana, Punjab, India
| | - D Gupta
- Department of Medical Oncology, Dharamshila Cancer Hospital, New Delhi, India
| | - R Agarwal
- Department of Surgical Oncology, Medanta Hospital, Gurugram, Haryana, India
| | - S Mittal
- Department of Medical Oncology, Action Balajee Cancer Center, New Delhi, India
| | - S K Verma
- Department of Medical Oncology, Jolly Grant Himalayan Institute, Dehradoon, Uttarakhand, India
| | - P M Parikh
- Department of Oncology, Shalby Cancer and Research Institutes, Mumbai, Maharashtra, India
| | - S Aggarwal
- Department of Medical Oncology, Sir Gangaram Hospital, New Delhi, India
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Banerjee S, Kaliyaperumal V, Kamraj D, Gupta D, Bisht S, Narang K, Singh G, Kataria T. Experience With Indigenously Designed Novel Cylindrical Intravaginal Template For Volumetric Brachytherapy Of Advanced Cervical Cancers By Intracavitary + Interstitial (IC+IS) Technique. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Iff J, Tuttle E, Gerrits C, Gupta D, Zhong Y. DMD – THERAPY. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Heitz F, Valabrega G, Pothuri B, Oaknin A, Graybill W, Sánchez AB, McCormick C, Baurain JF, Hoskins P, Denys H, O’Cearbhaill RE, Hietanen S, Moore RG, Knudsen AØ, de La Motte Rouge T, Levy T, Li Y, Gupta D, Monk BJ, González-Martín A. Efficacy and safety of niraparib in older patients with advanced ovarian cancer (OC): results from the PRIMA/ENGOT-OV26/GOG-3012 trial. Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0040-1718222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- F Heitz
- Kliniken Essen-Mitte, Department for Gynecology and Gynecologic Oncology
| | - G Valabrega
- FPO-IRCCS Candiolo, Candiolo Cancer Institute
- University of Torino, Department of Oncology
| | - B Pothuri
- Gynecologic Oncology Group (GOG) and Perlmutter Cancer Center, NYU Langone Health, Department of Obstetrics/Gynecology
| | - A Oaknin
- Vall d´Hebron University Hospital and Vall d´Hebron Institute of Oncology (VHIO)
| | | | - AB Sánchez
- Hospital General Universitario de Elche, Unit of Genetic Counseling in Cancer, Medical Oncology Department
| | | | - JF Baurain
- Université Catholique de Louvain and Cliniques Universitaires Saint-Luc
| | - P Hoskins
- British Columbia Cancer Agency, Vancouver Centre, Medical Oncology
| | | | - RE O’Cearbhaill
- Memorial Sloan Kettering Cancer Center, Weill Cornell Medical College, Department of Medicine
| | - S Hietanen
- Turku University Hospital, Department of Obstetrics and Gynecology
| | - RG Moore
- University of Rochester, Division of Gynecologic Oncology, Wilmot Cancer Institute, Department of Obstetrics and Gynecology
| | | | | | - T Levy
- Wolfson Medical Center, Sackler School of Medicine, Tel Aviv University, Department of Obstetrics and Gynecology
| | | | | | - BJ Monk
- Arizona Oncology (US Oncology Network), University of Arizona College of Medicine
| | - A González-Martín
- Grupo Español de Investigación en Cáncer de Ovario (GEICO) and Clínica Universidad de Navarra, Medical Oncology Department
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49
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Hardesty M, Krivak T, Wright G, Hamilton E, Fleming E, Gupta D, Keeton E, Chen J, Clements A, Gray H, Konecny G, Moore R, Richardson D. Phase II OVARIO study of niraparib + bevacizumab therapy in advanced ovarian cancer following front-line platinum-based chemotherapy with bevacizumab. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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50
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Marmé F, MR M, González-Martin A, Graybill W, O’Malley DM, Gaba L, OWS Y, Guerra E, Rose P, JF B, Ghamande S, Denys H, Prendergast E, Pisano C, Follana P, Baumann K, PM C, Korach J, Li Y, Gupta D, BJ M. Evaluation of an individualized starting dose of niraparib in the PRIMA/ENGOT-OV26/GOG-3012 study. Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0040-1718220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- F Marmé
- Universitätsklinikum Heidelberg, Faculty of Medicine
| | - Mirza MR
- Nordic Society of Gynaecological Oncology (NSGO)
- Rigshospitalet
| | | | - W Graybill
- Medical University of South Carolina, GOG, Gynecologic Oncology
| | | | - L Gaba
- Hospital Clinic de Barcelona, Medical Oncology Department
| | - Yap OWS
- University Gynecologic Oncology
| | - E Guerra
- Hospital Universitario Ramón y Cajal
| | | | - Baurain JF
- Cliniques Universitaires Saint-Luc, Université catholique de Louvain
| | - S Ghamande
- Georgia Cancer Center, Augusta University
| | | | | | - C Pisano
- Istituto Nazionale Tumori IRCCS Fondazione Pascale
| | | | - K Baumann
- Klinikum der Stadt Ludwigshafen, Department of Gynecology and Obstetrics
| | | | - J Korach
- Sackler Medical School Tel Aviv University, The Chaim Sheba Medical Center, Department of Oncology
| | | | | | - Monk BJ
- Arizona Oncology (US Oncology Network), University of Arizona College of Medicine
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