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Asad ZUA, Imran S, Parmar M, Bajwa A, Truong D, Agarwal S, Ghani A, Clifton S, Reese J, Khan MS, Munir MB, DeSimone CV, Sivaram C, Jackman WM, Po S, Stavrakis S, Al-Khatib SM. Antero-lateral vs. antero-posterior electrode position for cardioversion of atrial fibrillation: a systematic review and meta-analysis of randomized controlled trials. J Interv Card Electrophysiol 2023; 66:1989-2001. [PMID: 36929367 DOI: 10.1007/s10840-023-01523-x] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 03/06/2023] [Indexed: 03/18/2023]
Abstract
BACKGROUND Multiple randomized controlled trials (RCTs) have compared the success of antero-lateral vs. antero-posterior electrode position for cardioversion of atrial fibrillation (AF). However, due to small sample size and conflicting results of these RCTs, the optimal electrode positioning for successful cardioversion remains uncertain. METHODS A systematic search of MEDLINE and EMBASE was conducted. Outcomes of interest included overall success of cardioversion with restoration of sinus rhythm, 1st shock success, 2nd shock success, mean shock energy required for successful cardioversion, mean number of shocks required for successful cardioversion, success of cardioversion at high energy (> 150 J) and success of cardioversion at low energy (< 150 J). Mantel-Haenszel risk ratios (RR) with 95% confidence intervals were calculated using random-effects model. RESULTS A total of 14 RCTs comprising 2445 patients were included. There was no statistically significant difference between two cardioversion approaches in the overall success of cardioversion (RR 1.02; 95% CI [0.97-1.06]; p = 0.43), first shock success (RR 1.14; 95% CI [0.99-1.32]), second shock success (RR 1.08; 95% CI [0.94-1.23]), mean shock energy required (mean difference 6.49; 95% CI [-17.33-30.31], success at high energy > 150 J (RR 1.02; 95% CI [0.92-1.14] and success at low energy < 150 J (RR 1.09; 95% CI [0.97-1.22]). CONCLUSIONS This meta-analysis of RCTs shows no significant difference in the success of cardioversion between antero-lateral vs. antero-posterior electrode position for cardioversion of AF. Large well-conducted and adequately powered randomized clinical trials are needed to definitively address this question.
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Affiliation(s)
- Zain Ul Abideen Asad
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
| | - Sana Imran
- Department of Medicine, Rawalpindi Medical University, Rawalpindi, Pakistan
| | - Miloni Parmar
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Awais Bajwa
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Derek Truong
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Siddharth Agarwal
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Asad Ghani
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Shari Clifton
- Robert M Bird Health Sciences Library, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Jessica Reese
- Department of Biostatistics and Epidemiology, Hudson College of Public Health, Oklahoma City, OK, USA
| | - Muhammad Shahzeb Khan
- Duke Clinical Research Institute and Division of Cardiology, Duke University Medical Center, Durham, NC, USA
| | - Muhammad Bilal Munir
- Section of Electrophysiology, Division of Cardiology, University of California San Diego, La Jolla, CA, USA
| | | | - Chittur Sivaram
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Warren M Jackman
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Sunny Po
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Stavros Stavrakis
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Sana M Al-Khatib
- Duke Clinical Research Institute and Division of Cardiology, Duke University Medical Center, Durham, NC, USA
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Bajwa A, Farooqui SM, Hussain ST, Vandyck K. Right heart thrombus in transit: Raising bar in the management of cardiac arrest. Respir Med Case Rep 2022; 41:101801. [PMID: 36618850 PMCID: PMC9817167 DOI: 10.1016/j.rmcr.2022.101801] [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] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/07/2022] [Accepted: 12/18/2022] [Indexed: 12/31/2022] Open
Abstract
Right heart thrombus represents medical emergency as it is associated with acute pulmonary embolism. Right heart thrombus can manifest acutely in a dramatic fashion as cardiac arrest. Bedside echocardiography is a key to rapid diagnosis and allow early intervention. We report a case of elderly female who was admitted to our hospital after a mechanical fall and found to have hip fracture. Despite an initial uncomplicated course, she experienced cardiopulmonary arrest with right heart clot in transit identified on transesophageal echocardiography (TEE). We highlight the utility of point-of-care ultrasound as well as use of TEE to establish cause of cardiopulmonary arrest.
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Affiliation(s)
- Awais Bajwa
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
- Corresponding author. Department of Medicine, University of Oklahoma Health Sciences Center, 800 Stanton L. Young Blvd. AAT 6300, Oklahoma City, OK, 73104, USA.
| | - Samid M. Farooqui
- Section of Pulmonary, Critical Care, and Sleep Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
| | - Syed T. Hussain
- Section of Pulmonary, Critical Care, and Sleep Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
| | - Kofi Vandyck
- Department of Anesthesiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
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Jafry AH, Raza SM, Bajwa A, Hassan A, Akhtar KH, Salat H, Abdo T. Pulmonary hemorrhage after cardiac resynchronization therapy device implantation - A systematic review. Am J Med Sci 2022; 364:796-802. [PMID: 35798057 DOI: 10.1016/j.amjms.2022.06.018] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 03/09/2022] [Accepted: 06/28/2022] [Indexed: 01/25/2023]
Abstract
Cardiac implantable electronic devices are being increasingly used for a variety of cardiovascular diseases. We describe a rare case of massive hemoptysis after device implantation. The patient was managed conservatively with reversal of anticoagulation and inhaled tranexamic acid and had a successful recovery. A systematic review accompanies the case presentation. The modality and difficulty of access appear to play a significant role in precipitating bleeding, believed to be the result of direct injury to the pulmonary parenchyma and vasculature. The condition is often self-limiting; however, anticoagulation reversal, intubation, endobronchial intervention, and transarterial embolization may be indicated in more severe pulmonary hemorrhage.
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Affiliation(s)
- Ali Haider Jafry
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA.
| | - Syeda Maheen Raza
- Department of Medicine, Allama Iqbal Medical College, Lahore, Pakistan
| | - Awais Bajwa
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Ahmad Hassan
- Department of Medicine-Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Khawaja Hassan Akhtar
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Huzaifah Salat
- Department of Medicine, Section of Pulmonary, Critical Care and Sleep Medicine, University of Oklahoma Health Sciences Center and Oklahoma City VA Health Care System, Oklahoma City Oklahoma, USA
| | - Tony Abdo
- Department of Medicine, Section of Pulmonary, Critical Care and Sleep Medicine, University of Oklahoma Health Sciences Center and Oklahoma City VA Health Care System, Oklahoma City Oklahoma, USA
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Kapoor N, Mo X, Sigmund A, Saad A, Bajwa A, Voorhees T, Kittai A, de Lima M, Jaglowski S, Denlinger N, Welliver M. Effect of Radiation Therapy on Outcomes after CAR T-Cell Therapy for Non-Hodgkin Lymphoma. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1466] [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: 10/31/2022]
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Bajwa A, Parmar M, Imran S, Truong D, Agarwal S, Clifton S, Reese J, Asad ZUA. Abstract 86: Anterior-lateral Vs Anterior-posterior Electrode Positioning For Cardioversion Of Atrial Fibrillation And Atrial Arrythmias: A Systematic Review And Meta-analysis. Circ Cardiovasc Qual Outcomes 2022. [DOI: 10.1161/circoutcomes.15.suppl_1.86] [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: 11/16/2022]
Abstract
Anterior-lateral Vs Anterior-posterior Electrode Positioning for Cardioversion of Atrial Fibrillation and Atrial Arrhythmias: A Systematic Review and Meta-analysis
Introduction:
Multiple randomized controlled trials (RCTs) have compared the efficacy of anterolateral (AL) and anteroposterior (AP) electrode positioning for cardioversion of atrial fibrillation and other atrial arrhythmias with conflicting results. We hypothesized that AP electrode positioning will have a superior efficacy for cardioversion due to better alignment of the energy vector with the atria.
Methods:
A systematic search was conducted in the MEDLINE and Embase databases utilizing the Ovid interface. Results were screened to identify RCTs comparing AL and AP position of electrodes for cardioversion for atrial arrhythmias. Studied outcomes included the success of cardioversion, number of shocks, and mean shock energy required for successful cardioversion to sinus rhythm. Mantel-Haenszel aggregated risk ratios (RR) with 95% CIs were calculated.
Results:
A total of 14 RCTs were included comprising 2445 patients (1329 AL, 1116 AP). There was no statistically significant difference between the two groups with respect to successful cardioversion (RR 1.02 [0.97-1.06]; p = 0.43), first shock success (RR 1.14 [0.99-1.32]; p = 0.06), second shock success (RR1.08 [0.94-1.23]; p = 0.29), mean shock energies (mean difference 6.49 [17.33-30.31]; p = 0.59). We additionally compared success at high; >150 J (RR 1.02 [0.92-1.14] and low; <150 J (RR 1.09 [0.97-1.22]; p = 0.64) cardioversion energies which also did not show any significant difference.
Conclusions:
There is no significant difference in the efficacy between AL vs. AP electrode position for cardioversion of atrial arrhythmias.
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Affiliation(s)
- Awais Bajwa
- Univ of Oklahoma Health Sciences Cntr, Oklahoma City, OK
| | - Miloni Parmar
- Univ of Oklahoma Health Sciences Cntr, Oklahoma City, OK
| | - Sana Imran
- Univ of Oklahoma Health Sciences Cntr, Oklahoma City, OK
| | - Derek Truong
- Univ of Oklahoma Health Sciences Cntr, Oklahoma City, OK
| | | | - Shari Clifton
- Univ of Oklahoma Health Sciences Cntr, Oklahoma City, OK
| | - Jessica Reese
- Univ of Oklahoma Health Sciences Cntr, Oklahoma City, OK
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Bajwa A, Hussain ST, Youness H, Sawh RN, Zhao L, Abdo T. Endobronchial mucormycosis: A rare clinical entity diagnosed by endobronchial cryobiopsy. Respir Med Case Rep 2022; 37:101660. [PMID: 35573975 PMCID: PMC9097708 DOI: 10.1016/j.rmcr.2022.101660] [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] [Received: 04/16/2022] [Accepted: 04/28/2022] [Indexed: 12/01/2022] Open
Abstract
Mucormycosis is a rare fungal infection caused by fungi of the order Mucorales. The rhino-cerebral form of mucormycosis is most commonly seen in patients with diabetes mellitus, whereas pulmonary mucormycosis is a rare manifestation in patients with hematological malignancy and transplant recipients. We report a case of a 40-year-old male, with history of poorly controlled diabetes, who presented to the emergency room with a one-week history of hemoptysis. Computed Tomography (CT) of the chest was concerning for a lung mass or abscess. Flexible bronchoscopy revealed an endobronchial lesion that was biopsied with a cryoprobe. Histopathologic examination showed non-septate right-angle branching hyphae, typical of mucormycosis. He underwent surgical resection of the right middle and lower lobes and treatment with antimycotic agents with a complete recovery. This case highlights the importance of early histopathological diagnosis of pulmonary mucormycosis in preventing a fatal outcome.
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Affiliation(s)
- Awais Bajwa
- Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
- Corresponding author. Department of Medicine, University of Oklahoma Health Sciences Center, 800 Stanton L. Young Blvd, AAT 6300, Oklahoma City, OK, 73104, USA.
| | - Syed T. Hussain
- Section of Pulmonary, Critical Care, and Sleep Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
| | - Houssein Youness
- Section of Pulmonary, Critical Care, and Sleep Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
| | - Ravi N. Sawh
- Department of Pathology, Oklahoma City VA Health Care System, Oklahoma City, OK, 73104, USA
| | - Lichao Zhao
- Department of Pathology, Oklahoma City VA Health Care System, Oklahoma City, OK, 73104, USA
| | - Tony Abdo
- Section of Pulmonary, Critical Care, and Sleep Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
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Limbu R, Eveson L, Bajwa A, Leopold P, Gerrard D, Hatrick A, Taylor J, Chong P. The safety, feasibility and utility of 3-dimensional C-arm Cone-beam computed tomography with XperCT post-EVAR. Int J Surg 2016. [DOI: 10.1016/j.ijsu.2016.08.079] [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]
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Rutenberg M, Nichols R, Flampoori S, Bajwa A, Pham D, Siragusa D, Hoppe B. Proton Radiation Therapy in Reirradiation for Recurrent NSCLC. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1687] [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]
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9
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Deraniyagala R, Hoppe B, Morris C, Pham D, D'Agostino H, Bajwa A, Flampouri S, Huh S, Nichols R. Postoperative Proton Therapy for Resected Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1615] [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]
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10
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Kelly S, Albayati M, Gallagher D, Dourado R, Patel A, Saha P, Bajwa A, El-Sayed T, Salter R, Abisi S, Carrell T, Modarai B. Radiation exposure during complex endovascular repair of the aorta. Int J Surg 2015. [DOI: 10.1016/j.ijsu.2015.07.634] [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]
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Hashimoto A, Nakata T, Moroi M, Tamaki N, Nishimura T, Hasebe N, Kikuchi K, Salgado C, Jimenez-Heffernan A, Lopez-Martin J, Ramos-Font C, Sanchez De Mora E, Rivera F, Lopez-Aguilar R, Martinez A, Manovel A, Soriano E, Mushtaq S, Pontone G, Bertella E, Conte E, Segurini C, Volpato V, Beltrama V, Pepi M, Annoni A, Andreini D, Leen A, Scholte A, De Graaf M, Van Den Hoogen I, Kharagjitsingh A, Wolterbeek R, Kroft L, Jukema J, Bax J, Piccinelli M, Santana C, Sirineni G, Cooke C, Aguade Bruix S, Keidar Z, Frenkel A, Israel O, Candell Riera J, Garcia E, Sharma A, Bajwa A, Bhatnagar U, Thompson E, Patil S, Thompson R, Khoorshed A, Spencer F, Farncombe T, Tandon V, Singnurkar A, Gulenchyn K, Benito Gonzalez TF, Delgado Sanchez-Gracian C, Trinidad Lopez C, Mera Fernandez D, Villanueva Campos AM, Bustos Fiore A, Alonso Fernandez V, Mayorga Bajo A, Martinez Paz E, Iglesias Garriz I. Moderated Poster Session 1: Sunday 3 May 2015, 10:00-11:00 * Room: Moderated Poster Area. Eur Heart J Cardiovasc Imaging 2015. [DOI: 10.1093/ehjci/jev045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Albayati M, Kelly S, Gallagher D, Dourado R, Patel A, Saha P, Bajwa A, El-Sayed T, Salter R, Gkoutzious P, Carrell T, Abisi S, Modarai B. Angulation of the C-Arm During Complex Endovascular Aortic Procedures Increases Radiation Exposure to the Head. J Vasc Surg 2015. [DOI: 10.1016/j.jvs.2015.02.041] [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: 11/16/2022]
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13
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Albayati MA, Kelly S, Gallagher D, Dourado R, Patel AS, Saha P, Bajwa A, El-Sayed T, Salter R, Gkoutzios P, Gkoutzious P, Carrell T, Abisi S, Modarai B. Editor's choice--Angulation of the C-arm during complex endovascular aortic procedures increases radiation exposure to the head. Eur J Vasc Endovasc Surg 2015; 49:396-402. [PMID: 25655805 DOI: 10.1016/j.ejvs.2014.12.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 12/28/2014] [Indexed: 01/01/2023]
Abstract
OBJECTIVES/BACKGROUND The increased complexity of endovascular aortic repair necessitates longer procedural time and higher radiation exposure to the operator, particularly to exposed body parts. The aims were to measure directly exposure to radiation of the bodies and heads of the operating team during endovascular repair of thoracoabdominal aortic aneurysms (TAAA), and to identify factors that may increase exposure. METHODS This was a single-centre prospective study. Between October 2013 and July 2014, consecutive elective branched and fenestrated TAAA repairs performed in a hybrid operating room were studied. Electronic dosimeters were used to measure directly radiation exposure to the primary (PO) and assistant (AO) operator in three different areas (under-lead, over-lead, and head). Fluoroscopy and digital subtraction angiography (DSA) acquisition times, C-arm angulation, and PO/AO height were recorded. RESULTS Seventeen cases were analysed (Crawford II-IV), with a median operating time of 280 minutes (interquartile range 200-330 minutes). Median age was 76 years (range 71-81 years); median body mass index was 28 kg/m(2) (25-32 kg/m(2)). Stent-grafts incorporated branches only, fenestrations only, or a mixture of branches and fenestrations. A total of 21 branches and 38 fenestrations were cannulated and stented. Head dose was significantly higher in the PO compared with the AO (median 54 μSv [range 24-130 μSv] vs. 15 μSv [range 7-43 μSv], respectively; p = .022), as was over-lead body dose (median 80 μSv [range 37-163 μSv] vs. 32 μSv [range 6-48 μSv], respectively; p = .003). Corresponding under-lead doses were similar between operators (median 4 μSv [range 1-17 μSv] vs. 1 μSv [range 1-3 μSv], respectively; p = .222). Primary operator height, DSA acquisition time in left anterior oblique (LAO) position, and degrees of LAO angulation were independent predictors of PO head dose (p < .05). CONCLUSIONS The head is an unprotected area receiving a significant radiation dose during complex endovascular aortic repair. The deleterious effects of exposure to this area are not fully understood. Vascular interventionalists should be cognisant of head exposure increasing with C-arm angulation, and limit this manoeuvre.
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Affiliation(s)
- M A Albayati
- Academic Department of Vascular Surgery, Cardiovascular Division, King's College London, BHF Centre of Research Excellence & NIHR Biomedical Research Centre at King's Health Partners, St Thomas' Hospital, London, UK
| | - S Kelly
- Academic Department of Vascular Surgery, Cardiovascular Division, King's College London, BHF Centre of Research Excellence & NIHR Biomedical Research Centre at King's Health Partners, St Thomas' Hospital, London, UK
| | - D Gallagher
- Department of Medical Physics, Guy's & St Thomas' NHS Foundation Trust, London, UK
| | - R Dourado
- Department of Interventional Radiology, Guy's & St Thomas' NHS Foundation Trust, London, UK
| | - A S Patel
- Academic Department of Vascular Surgery, Cardiovascular Division, King's College London, BHF Centre of Research Excellence & NIHR Biomedical Research Centre at King's Health Partners, St Thomas' Hospital, London, UK
| | - P Saha
- Academic Department of Vascular Surgery, Cardiovascular Division, King's College London, BHF Centre of Research Excellence & NIHR Biomedical Research Centre at King's Health Partners, St Thomas' Hospital, London, UK
| | - A Bajwa
- Academic Department of Vascular Surgery, Cardiovascular Division, King's College London, BHF Centre of Research Excellence & NIHR Biomedical Research Centre at King's Health Partners, St Thomas' Hospital, London, UK
| | - T El-Sayed
- Academic Department of Vascular Surgery, Cardiovascular Division, King's College London, BHF Centre of Research Excellence & NIHR Biomedical Research Centre at King's Health Partners, St Thomas' Hospital, London, UK
| | - R Salter
- Department of Interventional Radiology, Guy's & St Thomas' NHS Foundation Trust, London, UK
| | | | - P Gkoutzious
- Department of Interventional Radiology, Guy's & St Thomas' NHS Foundation Trust, London, UK
| | - T Carrell
- Academic Department of Vascular Surgery, Cardiovascular Division, King's College London, BHF Centre of Research Excellence & NIHR Biomedical Research Centre at King's Health Partners, St Thomas' Hospital, London, UK
| | - S Abisi
- Academic Department of Vascular Surgery, Cardiovascular Division, King's College London, BHF Centre of Research Excellence & NIHR Biomedical Research Centre at King's Health Partners, St Thomas' Hospital, London, UK
| | - B Modarai
- Academic Department of Vascular Surgery, Cardiovascular Division, King's College London, BHF Centre of Research Excellence & NIHR Biomedical Research Centre at King's Health Partners, St Thomas' Hospital, London, UK.
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Furmston J, Patel AS, Ludwinski F, Zuzel V, Bajwa A, Saha P, Smith A, Modarai B. Angiogenic cell therapy for critical limb ischemia: an update on concepts and trials. J Cardiovasc Surg (Torino) 2014; 55:641-654. [PMID: 24941243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Therapeutic neovascularization is a novel approach used to salvage critically ischemic limbs that are not amenable to conventional treatments. Initial efforts were based on single injections of angiogenic factors but there is now a realization that delivering angiogenic cells is more likely to achieve effective revascularization. Clinical studies to date have mostly used mixtures of mononuclear cells harvested from the bone marrow or peripheral blood. The modest results achieved with these cells, only a proportion of which are angiogenic, has stimulated a search for more potent cell types. Preclinical studies have identified several candidates, including adipose derived, embryonic and induced pluripotent stem cells. This review provides an update on the current status of angiogenic cell therapy for the ischemic limb and outlines efforts aimed at enhancing the clinical efficacy of treatments.
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Affiliation(s)
- J Furmston
- Academic Department of Surgery Cardiovascular Division, King's College London BHF Centre of Research Excellence & NIHR Biomedical Research Centre at King's Health Partners St Thomas' Hospital, London, UK -
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Aprato A, Jayasekera N, Bajwa A, Villar RN. Peri-articular diseases of the hip: emerging frontiers in arthroscopic and endoscopic treatments. J Orthop Traumatol 2013; 15:1-11. [PMID: 23893307 PMCID: PMC3948506 DOI: 10.1007/s10195-013-0253-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Accepted: 07/09/2013] [Indexed: 01/15/2023] Open
Abstract
The precise diagnosis of both intra and extra-capsular disease of the hip is now possible because of commonly available advanced diagnostic imaging techniques. An increasing number of reports in the orthopedic literature describe new endoscopic and arthroscopic techniques to address peri-articular pathology of the hip. The purpose of this paper is to review current techniques in the management of extra-articular hip conditions.
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Affiliation(s)
- A Aprato
- The Richard Villar Practice, Spire Cambridge Lea Hospital, Impington, Cambridge, CB24 9EL, UK,
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Bajwa A, Thiruppathy K, Emmanuel A. The utility of conditioning sequences in barostat protocols for the measurement of rectal compliance. Colorectal Dis 2013; 15:715-8. [PMID: 23320603 DOI: 10.1111/codi.12109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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] [Received: 05/10/2012] [Accepted: 10/04/2012] [Indexed: 12/24/2022]
Abstract
AIM A barostat can be used to measure rectal sensitivity, compliance and elastance all of which are potentially important physiological parameters in the pathophysiology of faecal incontinence. Current practice recommends a conditioning distension sequence be performed prior to index distensions. We questioned the validity of this by comparing values for rectal compliance during sequential conditioning (CD) and index (ID) distensions in physiologically normal subjects. METHOD Ten subjects (five men, mean age 55.2 years) with normal anal canal manometry, anorectal sensitivity and balloon distension thresholds were studied. After determining the minimum distension pressure, subjects underwent sequential isobaric distensions: CD 4 mmHg distensions every 45 s and ID 4 mmHg every 2 min, both to a maximum of 24 mmHg or patient tolerance. Compliance values from both sequences were calculated by measuring the maximum slope of pressure-volume curves. A paired t-test was performed to compare any differences between sequences. RESULTS Mean rectal compliance were 11.4 ml/mmHg (SD 5.8 ml/mmHg) and 10.9 ml/mmHg (SD 5.7 ml/mmHg) in the CD and ID, respectively, with no statistical difference noted between distensions (P = 0.78). CONCLUSION Rectal compliance can be measured with a single distension protocol without the need for an initial conditioning distension. Conditioning the rectum adds additional complexity to barostat protocols and is not necessary.
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Affiliation(s)
- A Bajwa
- Department of Gastroenterology and Nutrition, University College Hospital, London, UK.
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Miles J, Bajwa A, Polson P, Muberekwa C. Retraction notice to P3: Patient satisfaction and abdominal wall function: TRAM versus DIEP flap breast reconstruction [Eur. J. Surg. Oncol. 38 (2012) 420]. Eur J Surg Oncol 2012; 38:1143. [DOI: 10.1016/j.ejso.2012.07.118] [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: 10/27/2022] Open
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18
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Abstract
AIM Quantification of the anorectal reflex function is critical for explaining the physiological control of continence. Reflex external anal sphincter activity increases with rectal distension in a dynamic response. We hypothesized that rectal distension would similarly augment voluntary external anal sphincter function, quantified by measuring the anal maximum squeeze pressure. METHOD Fifty-seven subjects (32 men, 25 women; median age 62 years), with normal anal canal manometry and endoanal ultrasound results, underwent a rectal barostat study with simultaneous anal manometry. Stepwise isovolumetric 50-ml distensions (n=35) or isobaric 4-mmHg distensions (n=22) above the minimum distending pressure were performed (up to 200 ml or 16 mmHg respectively), whilst anal resting pressure and maximum squeeze pressure were recorded and compared with the baseline pressure. RESULTS The distension-induced squeeze increment was calculated as the maximum percentage increase in maximum squeeze pressure with progressive rectal distension. This was observed in 53 of the 57 subjects as a mean ± standard deviation (range) increase of 32.8 ± 24.1 (-5.5 to 97.7)%. The mean ± standard deviation (range) distension-induced squeeze increment in male subjects was 36.1 ± 25.7 (-5.5 to 97.7)% and in female subjects was 28.1 ± 20.1 (-3.8 to 70.2)%. There was no significant difference between the sexes (P=0.194). CONCLUSION Rectal distension augments external anal sphincter function, confirming the existence of a dynamic rectoanal response. This may represent a quantifiable and important part of the continence mechanism.
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Affiliation(s)
- A Bajwa
- Physiology Unit, University College Hospital, London, UK
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19
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Wilson J, Bajwa A, Kamath V, Rangan A. Biomechanical comparison of interfragmentary compression in transverse fractures of the olecranon. ACTA ACUST UNITED AC 2011; 93:245-50. [PMID: 21282766 DOI: 10.1302/0301-620x.93b2.24613] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Compression and absolute stability are important in the management of intra-articular fractures. We compared tension band wiring with plate fixation for the treatment of fractures of the olecranon by measuring compression within the fracture. Identical transverse fractures were created in models of the ulna. Tension band wires were applied to ten fractures and ten were fixed with Acumed plates. Compression was measured using a Tekscan force transducer within the fracture gap. Dynamic testing was carried out by reproducing cyclical contraction of the triceps of 20 N and of the brachialis of 10 N. Both methods were tested on each sample. Paired t-tests compared overall compression and compression at the articular side of the fracture. The mean compression for plating was 819 N (sd 602, 95% confidence interval (CI)) and for tension band wiring was 77 N (sd 19, 95% CI) (p = 0.039). The mean compression on the articular side of the fracture for plating was 343 N (sd 276, 95% CI) and for tension band wiring was 1 N (sd 2, 95% CI) (p = 0.038). During simulated movements, the mean compression was reduced in both groups, with tension band wiring at −14 N (sd 7) and for plating −173 N (sd 32). No increase in compression on the articular side was detected in the tension band wiring group. Pre-contoured plates provide significantly greater compression than tension bands in the treatment of transverse fractures of the olecranon, both over the whole fracture and specifically at the articular side of the fracture. In tension band wiring the overall compression was reduced and articular compression remained negligible during simulated contraction of the triceps, challenging the tension band principle.
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Affiliation(s)
- J. Wilson
- North West Deanery, 3 Piccadilly Place, Manchester M1 3BN, UK
| | - A. Bajwa
- James Cook University Hospital, Marton Road, Middlesbrough TS4 3BW, UK
| | - V. Kamath
- Victoria Hospital, Whinney Heys Road, Blackpool, Lancashire FY3 8NR, UK
| | - A. Rangan
- James Cook University Hospital, Marton Road, Middlesbrough TS4 3BW, UK
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Bonner TJ, Fuller M, Bajwa A, Gregg PJ. Glomus tumour following a total knee replacement: a case report. Knee 2009; 16:515-7. [PMID: 19328696 DOI: 10.1016/j.knee.2009.02.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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] [Received: 06/10/2008] [Revised: 02/24/2009] [Accepted: 02/26/2009] [Indexed: 02/02/2023]
Abstract
Pain following total knee replacement (TKR) is a common problem and cause of poor satisfaction amongst patients. We report on a glomus tumour causing pain on the anterolateral aspect of the knee, 2 years after an otherwise successful total knee replacement for osteoarthritis. The tumour was treated by excision biopsy under general anaesthesia and the diagnosis confirmed by histopathological examination. The removal of the tumour relieved the pain and the patient regained good function. We conclude that a thorough clinical assessment of a patient with a painful knee following TKR is essential to detect and treat coincidental painful pathology.
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Affiliation(s)
- T J Bonner
- The James Cook University Hospital, Marton Road, Middlesbrough, Teesside, TS4 3BW, United Kingdom.
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21
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Hafez H, Owen LW, Lorimer CFK, Bajwa A. Advantage of a one-stop referral and management service for ruptured abdominal aortic aneurysms. Br J Surg 2009; 96:1416-21. [PMID: 19918851 DOI: 10.1002/bjs.6783] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
Background
In 2005, 4003 deaths in England and Wales were attributed to ruptured abdominal aortic aneurysm (RAAA). This study examined the referral and management patterns of this condition within one English county.
Methods
West Sussex has a population of 811 000 and is served by five hospitals with two main vascular networks. Between January 2005 and December 2007, data for community and in-hospital RAAA interventions and deaths were obtained. Probability of intervention and outcome for each network were calculated.
Results
Of 341 RAAA, 228 (66·9 per cent) presented to hospital. The mean distance travelled to hospitals with a full on-site vascular service was 17·6 (95 per cent confidence interval 15·5 to 19·7) km (124 patients) compared with 11·0 (9·5 to 12·7) km (104 patients) to hospitals with a partial or no vascular service (P < 0·001). Patients managed by the network with a one-stop RAAA management policy had an odds ratio of 2·4 for undergoing surgery and 2·5 for surviving the operation (P = 0·001 and P = 0·017 respectively).
Conclusion
Patients with RAAA should be offered a one-stop emergency vascular service even if this involves further travel. Such a strategy offers significantly higher chance of intervention and survival from ruptured AAA.
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Affiliation(s)
- H Hafez
- St Richard's Hospital Vascular Unit and the West Sussex Abdominal Aortic Aneurysm Screening Programme, Chichester, UK
| | - L W Owen
- St Richard's Hospital Vascular Unit and the West Sussex Abdominal Aortic Aneurysm Screening Programme, Chichester, UK
| | - C F K Lorimer
- St Richard's Hospital Vascular Unit and the West Sussex Abdominal Aortic Aneurysm Screening Programme, Chichester, UK
| | - A Bajwa
- St Richard's Hospital Vascular Unit and the West Sussex Abdominal Aortic Aneurysm Screening Programme, Chichester, UK
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22
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Kaye AD, Hoover JM, Kaye AJ, Ibrahim IN, Fox C, Bajwa A, Anwar M, Fields AM, Baluch A, Huffman S, Chilian W. Morphine, opioids, and the feline pulmonary vascular bed. Acta Anaesthesiol Scand 2008; 52:931-7. [PMID: 18477088 DOI: 10.1111/j.1399-6576.2008.01595.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Opioid-induced vasodepressor responses have been reported in a variety of species and laboratory models. The aim of this study was to ascertain the relative potencies of different clinically relevant opioids compared with traditional vasodepressor agents in the feline pulmonary vascular bed. A second aim was to study the effects of morphine and to identify the receptors involved in the mediation or the modulation of these effects. METHODS This was a prospective vehicle-controlled study involving an intact chest preparation of adult mongrel cats. The effects of various opioids, morphine, fentanyl, remifentanil, sufentanil, and meperidine were compared with other vasodepressor agents. Additionally, the effects of L-N(5)-(1-iminoethyl) ornithine hydrochloride (L-NIO) (nitric oxide synthase inhibitor), nimesulide [selective cyclooxygenase (COX)-2 inhibitor], glibenclamide (ATP-sensitive K+ channel blocker), naloxone (non-selective opioid receptor antagonist), and diphenhydramine (histamine H(1)-receptor antagonist) were investigated on pulmonary arterial responses to morphine and other selected agonists in the feline pulmonary vascular bed. The systemic pressure and lobar arterial perfusion pressure were continuously monitored, electronically averaged, and recorded. RESULTS In the cat pulmonary vascular bed of the isolated left lower lobe, morphine, remifentanil, fentanyl, sufentanil, and meperidine induced a dose-dependent moderate vasodepressor response and it appeared that sufentanil was the most potent on a nanomolar basis. The effects of morphine were not significantly altered after administration of L-NIO, nimesulide, and glibenclamide. However, the vascular responses to morphine were significantly attenuated following administration of naloxone and diphenhydramine. CONCLUSION The results of the present study suggest that sufentanil appears to have slightly more potency and morphine the least of the five opioid agonists studied on a nanomolar basis. Morphine-induced vasodilatory responses appeared to be mediated or modulated by both opioid receptor and histamine-receptor-sensitive pathways.
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Affiliation(s)
- A D Kaye
- Department of Anesthesiology, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA.
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Bajwa A, Blunt N, Vyas S, Suliman I, Bridgewater J, Hochhauser D, Ledermann JA, O'Bichere A. Primary tumour resection and survival in the palliative management of metastatic colorectal cancer. Eur J Surg Oncol 2008; 35:164-7. [PMID: 18644695 DOI: 10.1016/j.ejso.2008.06.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2008] [Revised: 05/30/2008] [Accepted: 06/02/2008] [Indexed: 02/02/2023] Open
Abstract
AIM To examine whether surgical resection of the primary tumour confers a survival benefit and to identify the predictive factors of outcome in patients presenting with asymptomatic metastatic colorectal cancer (CRC). MATERIALS AND METHODS A review of a hospital database in a tertiary institution over a 6-year period (1999-2005) revealed 70 patients with asymptomatic primary CRC and unresectable liver metastases treated initially by systemic chemotherapy. A multivariate regression analysis model was used to determine the relative influence of multiple tumours, single/multiple liver metastases, tumour site, differentiation, response of liver and primary tumour to chemotherapy, biochemical response to chemotherapy, age at presentation, performance status and surgical intervention for the CRC primary. RESULTS In 67 cases (3 lost to follow-up), 63 had multiple and 4 single surgically irresectable liver metastases. A total of 41 deaths were recorded. All patients received systemic chemotherapy and surgery was performed for bowel obstruction, bleeding or stable disease (n=32). Surgery (OR 0.26; p=0.00013) and clinical response of the primary tumour (OR 0.53; p=0.012) were independently associated with prolonged survival. Proximal tumours (OR 2.61; p=0.0075) and multiple primaries (OR 3.37; p=0.02) were associated with poor outcome. CONCLUSIONS Surgical resection and response of the primary tumour to chemotherapy may be associated with improved survival, but proximal or multiple cancers predict poor outcome in patients with asymptomatic CRC and unresectable metastatic disease.
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Affiliation(s)
- A Bajwa
- Department of Surgery, University College London Hospitals, London, UK
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24
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Fotiadis N, Sabharwal T, Salter R, Sandhu C, Bajwa A, Carrell T, Taylor P, Reidy J. Abstract No. 173: Endovascular Repair of Isolated Iliac Artery Aneurysms; Mid-Term Results. J Vasc Interv Radiol 2008. [DOI: 10.1016/j.jvir.2007.12.192] [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: 10/22/2022] Open
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25
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Bajwa A, Davis M, Moawad M, Taylor P. Paraplegia Following Elective Endovascular Repair of Abdominal Aortic Aneurysm: Reversal with Cerebrospinal Fluid Drainage. Eur J Vasc Endovasc Surg 2008; 35:46-8. [DOI: 10.1016/j.ejvs.2007.08.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2007] [Accepted: 08/01/2007] [Indexed: 10/22/2022]
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Abstract
INTRODUCTION This study examines the impact of rationing varicose vein operations on operative training on a general surgical unit with a vascular interest. PATIENTS AND METHODS Log-books of middle-grade surgeons were analysed for 3-month periods before and after a decision by the local Primary Care Trust to ration varicose vein referrals. Number, intermediate equivalents and type of operations were recorded, whether they were general or vascular cases and whether the trainee had carried out or assisted with the operation. RESULTS There was a slight fall in the total number of operations in which the middle-grade surgeons were involved (208 to 186). There was a significant increase in general surgical cases with the fall in number of varicose vein operations (P < 0.0001). The fall in case-load and work-load operative training in vascular surgery was compensated by an increase in general surgical cases (P = 0.0003). This was largely due to increased number of hernia repairs (P = 0.0035). CONCLUSIONS From the point of operative training, a vascular unit in a district general hospital would not be sustainable following withdrawal of varicose vein services. However, this can be off-set by increasing general surgical case-load to fill the gap created.
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Affiliation(s)
- A Bajwa
- Department of Vascular Surgery, Royal Berkshire Hospital, Reading, UK
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27
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Abstract
OBJECTIVE Reports suggest that the rates of tuberculosis (TB) continue to rise in the UK and throughout the world. The spread of the disease is aided by poverty, overcrowding, co-infection with human immunodeficiency virus and drug resistance. Consistent with the overall trend, intra-abdominal and gastrointestinal (GI) TB rates are rising. Tuberculosis is a treatable disease, whether occurring in the lungs or at extra-pulmonary sites but the nonspecific features of the disease result in difficulty in establishing a diagnosis. In this report, we have concentrated on the benefits and potential pitfalls of diagnostic methods. METHOD A literature review was performed using the National Library of Medicine's Pubmed Database using the keywords diagnosis, management, abdominal and GI TB. RESULTS Abdominal TB presents a particular challenge, as the diverse features of the disease do not readily suggest a particular diagnosis and diagnostic delays lead to significant morbidity and mortality. A number of investigative methods have been used to aid in the diagnosis of abdominal and GI TB. CONCLUSION The nonspecific presentation of abdominal and GI TB present challenges in the diagnosis of this increasingly common disease. A high index of suspicion is an important factor in early diagnosis. After a diagnosis has been established, prompt initiation of treatment helps prevent morbidity and mortality.
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Affiliation(s)
- S Rasheed
- St Mark's Hospital, Harrow, Middlesex, UK
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Abstract
INTRODUCTION There is considerable debate as to whether vascular surgery should be a subspecialty separate from general surgery. This study examines the changing relationship between general and vascular surgery in a district general surgical unit over 16 years. PATIENTS AND METHODS A detailed survey of referrals, admissions and operations to one unit was carried out over 3 months in 2003. This was compared with similar surveys in 1989, 1990 and 1995. In addition a 3-month audit of operations performed was carried out in 2005 following a decision by the Primary Care Trust (PCT) to reduce varicose vein referrals. RESULTS There was a significant increase in the number of varicose vein and arterial referrals 1989-2003 (P = 0.0001 and P < 0.0001, respectively). This was reflected in increased number of vascular admissions (P < 0.0001). In 1989, 14% of the arterial cases were admitted as emergencies. This figure rose to 52% in 2003 (P < 0.0001). There was a significant increase in the number of arterial operations performed between 1989 and 1995; however, from 1995 to 2003 this number fell P < 0.0001). The number of varicose vein procedures increased significantly 1989-2003 (P < 0.0001), with a significant fall after the PCT decision (P < 0.0001). However, the number of operations carried out in 2005 increased slightly with the proportion of general surgical cases, mostly hernia repairs and laparoscopic cholecystectomies, increasing. CONCLUSIONS With increasing specialisation comes the risk that reduction in any aspect of a particular specialty may result in that unit becoming unsustainable. In vascular surgery this will inevitably lead to centralisation of services. In a large district general hospital having two general surgeons with a vascular interest, the general surgical component has maintained the workload of the unit following reduction in varicose vein referrals.
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Affiliation(s)
- S Q Ashraf
- Department of Surgery, Royal Berkshire Hospital, Reading, UK
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Bajwa A, Watts TLP, Newton JT. Health control beliefs and quality of life considerations before and during periodontal treatment. Oral Health Prev Dent 2007; 5:101-4. [PMID: 17722435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
PURPOSE Previous studies have indicated that health beliefs are related to the periodontal disease status and treatment behaviour of patients. However, it is possible that treatment may affect a patient's health beliefs and thus complicate this issue. The present study therefore looked for changes in health control beliefs and oral health impacts in patients undergoing periodontal treatment in a dental school. MATERIALS AND METHODS Questionnaires assessing dental multidimensional locus of control (LOC) and oral health impact profile (OHIP) were posted to subjects due to attend for initial periodontal consultation and were returned by 127 patients who attended. Repeat questionnaires were sent to all subjects 6 months later when they had received some oral hygiene instruction, scaling and root planing, and 55 were returned. RESULTS Comparison of data for those subjects who completed both questionnaires showed no difference in LOC but showed a trend (p = 0.065) towards reduced OHIP (i.e. improved oral health-related quality of life). CONCLUSIONS These subjects apparently did not alter their health control beliefs about periodontal disease as a result of treatment, but there may have been an improvement in their oral health-related quality of life. Further studies are required to confirm these possibilities.
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Affiliation(s)
- A Bajwa
- Department of Periodontology and Preventive Dentistry, King's College London Dental Institute at Guy's, Hospital, London, UK
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Abstract
We have investigated the contaminating bacteria in primary hip arthroplasty and their sensitivity to the prophylactic antibiotics currently in use. Impressions (627) of the gloved hands of the surgical team in 50 total hip arthroplasties were obtained on blood agar. The gloves were changed after draping, at intervals of 20 minutes thereafter, and before using cement. Changes were also undertaken whenever a visible puncture was detected. The culture plates were incubated at 37°C for 48 hours. Isolates were identified and tested for sensitivity to flucloxacillin, which is a recognised indicator of sensitivity to cefuroxime. They were also tested against other agents depending upon their appearance on Gram staining. We found contamination in 57 (9%) impressions and 106 bacterial isolates. Coagulase-negative staphylococci were seen most frequently (68.9%), but we also isolated Micrococcus (12.3%), diphtheroids (9.4%), Staphylococcus aureus (6.6%) and Escherichia coli (0.9%). Of the coagulase-negative staphylococci, only 52.1% were sensitive to flucloxacillin and therefore to cefuroxime. We believe that it is now appropriate to review the relevance of prophylaxis with cefuroxime and to consider the use of other agents.
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Affiliation(s)
- M Al-Maiyah
- James Cook University Hospital, Middlesbrough, TS4 3BW, England, UK.
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Bajwa A, Horst RL, Beckman MJ. Gene profiling the effects of calcium deficiency versus 1,25-dihydroxyvitamin D induced hypercalcemia in rat kidney cortex. Arch Biochem Biophys 2005; 438:182-94. [PMID: 15913539 DOI: 10.1016/j.abb.2005.04.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2005] [Revised: 04/20/2005] [Accepted: 04/21/2005] [Indexed: 11/16/2022]
Abstract
Determinants involved in the activation and repression of 1,25-dihydroxyvitamin D (1,25(OH)(2)D(3)) synthesis in renal cortex by changes in extracellular Ca were studied. Cortical kidney RNA isolated from hypocalcemic (LC) rats generated by a low Ca diet, and hypercalcemic (HC) rats generated by a normal Ca diet and two sequential 1 microg doses of 1,25(OH)(2)D(3). Among the genes up-regulated were 1alpha-OHase (4.6-fold) in the LC group and high differential gene expression of VDR (4.0-fold) and 24-OHase (10.4-fold) in the HC group. Moreover, the exposure of renal cortex to LC versus HC conditions revealed a high differential expression of a PKA-dominated pathway involving CBP interacting protein, GATA-1 and CREB transcription factors in the LC model. In the HC model, elevated renal cortex gene expression of several growth factors, peptide receptors, and intracellular signaling molecules depicts a role for CaSR activation and receptor tyrosine kinase signaling in 1,25(OH)(2)D(3)-mediated gene activation and repression of 1alpha-OHase.
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Affiliation(s)
- A Bajwa
- Department of Biochemistry, Virginia Commonwealth University Medical Center, Richmond, 23298-0694, USA
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Abstract
We conducted a randomised, controlled trial to determine whether changing gloves at specified intervals can reduce the incidence of glove perforation and contamination in total hip arthroplasty. A total of 50 patients were included in the study. In the study group (25 patients), gloves were changed at 20-minute intervals or prior to cementation. In the control group (25 patients), gloves were changed prior to cementation. In addition, gloves were changed in both groups whenever there was a visible puncture. Only outer gloves were investigated. Contamination was tested by impression of gloved fingers on blood agar and culture plates were subsequently incubated at 37°C for 48 hours. The number of colonies and types of organisms were recorded. Glove perforation was assessed using the water test. The incidence of perforation and contamination was significantly lower in the study group compared with the control group. Changing gloves at regular intervals is an effective way to decrease the incidence of glove perforation and bacterial contamination during total hip arthroplasty.
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Affiliation(s)
- M Al-Maiyah
- Department of Orthopaedics, School of Health, University of Teeside, Middlesbrough TS1 3BA, UK.
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Kamath MV, May A, Hollerbach S, Fitzpatrick D, Bajwa A, Tougas G, Fallen EL, Shine G, Upton AR. Effects of esophageal stimulation in healthy subjects. Crit Rev Biomed Eng 2001; 28:81-6. [PMID: 10999369 DOI: 10.1615/critrevbiomedeng.v28.i12.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We studied the effects of esophageal electrical stimulation on heart rate variability power spectra (PS/HRV) and cortical evoked potentials (EPs) in healthy subjects. The intensity of stimulation was varied from 2.7 to 20 mA. We found that the amplitude of the cortical evoked potentials (amplitude of the N2/P2 peak) increased from 5.1 +/- 0.7 microV at 5 mA to 16.3 +/- 1.1 microV at 20 mA. The PS/HRV showed an increase in the vagal modulation of the sinus node. When the stimulation frequency was varied from 0.1 to 1 Hz at a constant intensity of 15 mA, the amplitude of cortical EPs (N2/P2 peak) decreased with increase in the frequency of stimulation (p < 0.05). The LF:HF ratio decreased significantly for all frequencies of stimulation (p < 0.005). An experimental paradigm to evoke the cognitive component in the cortical EPs yielded a peak around 354 ms following the stimulus.
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Affiliation(s)
- M V Kamath
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
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Kamath MV, May A, Hollerbach S, Fitzpatrick D, Bulat R, Bajwa A, Tougas G, Fallen EL, Shine G, Upton AR. Effects of esophageal stimulation in patients with functional disorders of the gastrointestinal tract. Crit Rev Biomed Eng 2001; 28:87-93. [PMID: 10999370 DOI: 10.1615/critrevbiomedeng.v28.i12.150] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We studied the effects of esophageal electrical stimulation on cortical-evoked potentials (EPs) and power spectrum of heart rate variability (PS/HRV) in patients with diabetes and non-cardiac chest pain (NCCP). We also recorded cognitive-evoked potentials (P300 EPs) in response to an odd-ball stimulation in patients with NCCP. Diabetic patients did not yield reproducible cortical EPs. Their power spectra of heart rate variability (PS/HRV) showed an increased vagal modulation during stimulation. In patients with NCCP the P300 EPs were of greater amplitude (17 +/- 3 microV vs. 12 +/- 1 microV in controls, p < 0.04), while peak latencies were slightly elongated in patients (382 +/- 22 ms vs. 354 +/- 12 ms in controls). The PS/HRV in these patients also showed an increased vagal modulation of the sinus node activity. Our results suggest the following: (1) in patients with diabetes, afferent pathways and processing of sensory signals are likely to be impaired; (2) an increased perception of esophageal stimulation reflects an exaggerated brainstem response and altered cortical processing of visceral sensation in patients with NCCP.
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Affiliation(s)
- M V Kamath
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
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Abstract
In this paper, we describe a novel approach to the study of problem solving involving the detailed analysis of natural scanning eye movements during the "one-touch" Tower-of-London (TOL) task. We showed subjects a series of pictures depicting two arrangements of colored balls in pockets within the upper and lower halves of a computer display. The task was to plan (but not to execute) the shortest movement sequence required to rearrange the balls in one half of the display (the Workspace) to match the arrangement in the opposite half (the Goalspace) and indicate the minimum number of moves required for problem solution. We report that subjects are more likely to look towards the Goalspace in the initial period after picture presentation, but bias gaze towards the Workspace during the middle of trials. Towards the end of a trial, subjects are once again more likely to fixate the Goalspace. This pattern is found regardless of whether the subjects solve problems by rearranging the balls in the lower or upper visual fields, demonstrating that this strategy correlates with discrete phases in problem solving. A second experiment showed that efficient planners direct their gaze selectively towards the problem critical balls in the Workspace. In contrast, individuals who make errors spend more time looking at irrelevant items and are strongly influenced by the movement strategy needed to solve the preceding problem. We conclude that efficient solution of the TOL requires the capacity to generate and flexibly shift between control sets, including those underlying ocular scanning. The role of working memory and the prefrontal cerebral cortex in the task are discussed.
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Kamath MV, Hollerbach S, Bajwa A, Fallen EL, Upton AR, Tougas G. Neurocardiac and cerebral responses evoked by esophageal vago-afferent stimulation in humans: effect of varying intensities. Cardiovasc Res 1998; 40:591-9. [PMID: 10070501 DOI: 10.1016/s0008-6363(98)00190-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE This study was designed to determine whether esophageal vago-afferent electrostimulation, over a wide range of stimulus intensities, can sustain a cardiac vago-efferent effect by way of central nervous system processing. METHODS Studies were performed in ten healthy male subjects (23.9 +/- 6.3 years). Esophageal electrostimulation was carried out using a stimulating electrode placed in the distal esophagus. Stimulation of esophageal vago-afferent fibres was employed using electrical impulses (200 microseconds at 0.2 Hz x 128 s) varying from 2.7 to 20 mA. Respiratory frequencies, beat-to-beat heart rate autospectra and cerebral evoked potentials were recorded at baseline and at each stimulus intensity in random order. RESULTS With esophageal electrical stimulation, we observed a small non-significant decrease in heart rate. There was a dramatic shift of the instantaneous heart rate power spectra towards enhanced cardiac vagal modulation with intensities as low as 5 mA. This effect was sustained throughout all intensities with no further change in either the low frequency or high frequency power. Conversely, there was a linear dose response relationship between cerebral evoked potential amplitude and stimulus intensity mainly occurring above perception threshold (10 mA). Esophageal stimulation had no significant effect on heart rate or respiratory frequency at any stimulus intensity. CONCLUSIONS These results indicate that electrical stimulation of the distal esophagus across a wide range of current intensities elicits a reproducible shift in the heart rate power spectrum towards enhanced vagal modulation. The data suggest a closed loop afferent/efferent circuitry wherein tonic visceral afferent impulses appear to elicit a phasic or modulatory vago-efferent cardiac response in healthy subjects.
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Affiliation(s)
- M V Kamath
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
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Bajwa A, Hollerbach S, Kamath MV, Upton AR, Fitzpatrick D, Fallen EL, Tougas G. Neurocardiac response to esophageal electric stimulation in humans: effects of varying stimulation frequencies. Am J Physiol 1997; 272:R896-901. [PMID: 9087653 DOI: 10.1152/ajpregu.1997.272.3.r896] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The purpose of this study was to determine if the cardioautonomic responses to esophageal electric stimulation were mediated entirely through modulation of respiratory frequency or a direct vagal effect. We performed electric stimulation of the esophagus in 13 healthy male controls (24 +/- 6 yr) using a manometric catheter to which a stainless steel electrode was attached. Stimulation frequencies ranged from 0.1 to 1 Hz and were applied in random fashion. We computed the power spectra of the heart rate variability and respiratory frequency as measures of autonomic function. Electric stimulation of the esophagus produced significant increases in the high-frequency power of the heart rate autospectrum at all stimulation frequencies (maximal at 0.2 Hz). However, regardless of the frequency of esophageal stimulation, the respiratory rate was not changed from baseline. These studies indicate that enhancement of cardiac vagal modulation observed in response to esophageal electric stimulation is not primarily due to changes in respiratory frequency, but rather occurs through a direct, vagally mediated action through sensory neural pathways involving vagal esophageal afferents.
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Affiliation(s)
- A Bajwa
- Division of Gastroenterology, McMaster University Faculty of Health Sciences, Hamilton, Ontario, Canada
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