Profile
Dr Valchanov is a Senior Consultant in Anaesthesia in SGH. He has practiced for many years in Cardiothoracic Anaesthesia and Intensive Care, as well as Chronic Pain in the UK. He also spent 2 years in British Columbia Canada before moving to Singapore.
Professional Appointments and Committee Memberships
Clinical Appointments:
- Staff Anesthesiologist, Royal Columbian Hospital, British Columbia, Canada
- Consultant in Anaesthesia and Intensive Care, Royal Papworth Hospital, Cambridge, UK
- Specialist Registrar in Anaesthesia, Intensive Care, and Pain Medicine in the East Anglia Deanery, UK
- Senior House Officer in Anaesthesia and Intensive Care in Kent and Sussex Hospital, Tunbridge Wells and William Harvey Hospital, Ashford, Kent, UK
- Senior House Officer in Renal Medicine and Haematology, Dorset County Hospital, Dorchester, Dorset, UK
- Internship in Medicine, Surgery, Obstetrics and Gynaecology, Paediatrics, Varna Medical University, Varna, Bulgaria
- Part-time Demonstrator in Anatomy, Varna Medical University, Varna, Bulgaria
Academic Appointments:
- Former Senior Clinical Tutor for the Cambridge University, UK
- Former Visiting Research Fellow, Department of Oral Pathology, King's College School of Medicine and Dentistry, London, UK
- Former Part-time Research Student in Cell Biology, Department of Anatomy and Histology, Varna Medical University, Varna, Bulgaria
Professional Appointments and Committee Memberships:
- Former Examiner for Royal College of Anaesthetists, UK
Education:
- Former Senior Clinical Tutor for Cambridge University, UK
- Former Tutor for Anaesthesia, Papworth Hospital, UK
- Former Tutor for Intensive Care Medicine, Papworth Hospital, UK
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Awards
- Clinical Excellence Awards from Royal Papworth Hospital, UK
- Valedictor of Varna Medical University, Bulgaria
- National Academic Award, Bulgaria
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Research Interests
- ECMO support in Intensive Care
- Cardiothoracic Intensive Care
- Refractory Angina Pectoris
- Cardiothoracic Transplantation
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Publications
- Groenewoud R, Gunning D, Fava C, Sharpe R, Valchanov K, and Shayan H. Successful Thrombolysis of Early Bioprosthetic Mitral Valve Thrombosis Following Extracorporeal Membrane Oxygenation. Perfusion, 2023;0(0). doi:10.1177/02676591231157200
- Ignatov G, Ng CY, Tan Z, Velchev V, Kurkchieva T, Whitbread J, Valchanov KP. Early experience with Pulmonary Endarterectomy in Bulgaraia – Case series. Ann Transl Med 2023, 11(5): 216. Doi: 10.21037/atm-22-4370
- Ruiz J, Foglia J, Valchanov K, Gill N. A case of intra-operative anaphylaxis to latex in a pulmonary artery catheter. Ann Allergy Asthma Immunol 2022, 129 (5): S98
- Long E, Ruiz JC, Foglia J, Valchanov K, Meikle A. Recognition, treatment, and prevention of perioperative anaphylaxis: a narrative review. AIMS Medical Science 2022, 9 (1): 32-50
- Alvarez-Villegas, D, Gimenez-Mila M, Sbraga F, Camprubi I, Gil A, Valchanov K, Shayan H, Castillo J, Weiner MM. Dealing with the Right Side: Carcinoid Heart Disease. J Cardiovasc Thorac Anesth 2021, doi.org/10.1053/j.jvca.2021.10.030
- Valchanov, K., Martinez, G., Valchanova, A. (2022). Anaesthesia and Intensive Care for Adult Patients Undergoing Aortic Arch Surgery. In: Vives, M., Hernandez, A. (eds) Cardiac Anesthesia and Postoperative Care in the 21st Century. Springer, Cham. https://doi.org/10.1007/978-3-030-79721-8_18
- Valchanov K. Transplant chapter in The Trainee Handbook 2021 published by the Association of Anaesthetists. DOI: http://dx.doi.org/10.21466/g.TH2.2021, published July 2021
- Marczin N, de Waal EEC, Hopkins PMA, et al (including Valchanov K). International Consensus Recommendations for Anaesthetic and Intensive care Management of Lung Transplantation. J Heart Lung Transplant 2021, 40 (11): 1327-1348
- Valchanov K, Tan, Z, Valchanova A. Medical and Interventional Treatment of Refractory Angina. J Cardiovasc Disorders 2021, 7 (2): 1048
- Protopapas AD, Valchanov K, Catarino P, Zochios V. Neuroprotection and Aorta: One System, One Artery, One Expectation, One Team. Invited Editorial. J Cardiovasc Thorac Anesth 2021, 35 (4), 1189-1191
- COVIDTrach (including Valchanov K). The Outcomes of Mechanically Ventilated COVID-19 Patients undergoing Tracheostomy in UK: Interim Report. B J Sur 2020, 107, e583-e584
- Valchanov K, Krishnan U, Hoole SP, Davies WR, Pettit S, Jones N, Parmar J, Catarino P, Osman M, Berman M. COVID-19 Patient with Coronary Thrombosis supported with ECMO and Impella 5.0 Assist Device. Eur Heart J – Case Reports 2020; 4(6): 1–6
- Gimenez M, Videla S, Pallares N, Sabate A, Parmar J, Catarino P, Tosh W, Rafiq MU, Nalpon J, Valchanov K. Impact of Surgical Technique and Analgesia on Clinical Outcomes after Lung Transplantation: A Strobe-Compliant Cohort Study. Medicine 2020; 99 (46): e22427
- Rafiq MU, Valchanov K, Vuylsteke A, Taghavi FJ, Iyer SB, Sudarshan CD, Fowles J-A, Anderson S, Govender P, Holmes M, White A, Mishra A, Mwaura L, Jenkins D. Regional extra-corporal membrane oxygenation retrieval service in severe acute respiratory syndrome coronavirus-2 pandemic: an interdisciplinary team approach to maintain service provision despite increased demand. Eur J Cardiothorac Sur 2020, 58 (5), 875-880
- Valchanov K. Perioperative Management of Patients with undergoing Mechanical Circulatory Support. Editorial. Annals of Translational Medicine 2020, 8(13): 826
- Mwara L, Ripoll B, Valchanov K, Nashef SAM. Cardiac Surgery in Nonagenarians: An Institutional 20 Year Experience. Am J Sur Clin Case Reports 2020; V1(4): 1-4
- Valchanov K, Salaunkey K, Parmar J. Percutaneous Dilatational Tracheostomy in COVID-19 ECMO Patients: A Case Series. J Cardiohorac Vasc Anesth 2020, 35 (1), 348
- Pieterse J, Valchanov K, Abu-Omar Y, Falter F. Thrombotic risk in central venoarterial membrane oxygenation post cardiac surgery. Perfusion 2020, 36 (1), 50-56
- Patterson C, Valchanov K, Barker A, Goddard M, Yang H, Butchard AG. Severe ARDS requiring ECMO – a Consequence of Vaping. Eur Resp J Open Research 2020; 6: 00013-2020
- Valchanov K and Mishra A. Spinal Cord Stimulation for Refractory Angina Pectoris: A Narrative Review. SOJ Anesthesiology and Pain Management 2019, www.symbiosisonlinepublishing.com ISSN Online: 2374-684X
- Schmidt M et al., including Valchanov K. Mechanical Ventilation Management during Extracorporeal Membrane Oxygenation for Acute Respiratory Distress Syndrome an International Multicentre Prospective Cohort. American Journal of Respiratory and Critical Care Medicine 2019, 200 (8); 1002-1012
- Tan Z, Nalpon J, Valchanov K. Case Series of Left Stellate Ganglion Blocks for Refractory Angina Pectoris: 14 year later and still efficacious. Journal of Pain and Symptom Management 2019, 58 (3): 11-14
- Tan Z, Ng CY, Jenkins D, Barrow L, Valchanov K. De-prescribing practices for anticonvulsants after benign seizures secondary to high dose tranexamic acid in a single large UK cardiothoracic centre. European Journal of Hospital Pharmacy 2019, 27 (6), 337-340
- Volpi S, Sertic F, Valchanov K, De Silva R. Use veno-venous extra corporeal membrane oxygenation in elderly patients with post-cardiotomy hypoxia: the changing paradigm of respiratory support in adult respiratory distress syndrome. Journal of Cardiothoracic Surgery 2019 14:10
- Oscier C, Falter F, de Silva RD, Valchanov K. Three consecutive cases of fatal intraoperative intracardiac thrombosis associated with the initiation of VA ECMO in the presence of aprotinin. Perfusion 2019; 34 (5); 417-421
- Tan Z, Valchanov K, Klein A. Complications in aortic surgery: are the CSF drains to be blamed? Comment on Br J Anesth 2018; 120: 904-914
- Nair SK, Sudarshan CD, Thorpe BS, Singh J, Pillay T, Catarino P, Valchanov K, Codispoti M, Dunning J, Abu-Omar Y, Moorjani N, Matthews C, Freeman CJ, Fox-Rushby A, Sharples L. Mini-Stern Trial: A randomized trial comparing mini-sternotomy to full median sternotomy for aortic valve replacement. J Thorc Cardiovasc Surg 2018, 156: 2024-2032
- Aneman A, Brechot N, Brodie D, Colreavy F, Fraser J, Gomersall C, McCanny P, Moller-Sorensen PH, Takala J, Valchanov K, Vallely M. Advances in Critical Care Management of Patients Undergoing Cardiac Surgery. Intensive Care Medicine 2018, 44: 799-810
- Valchanov K, Falter F, George S, Burt C, Roscoe A, Ng C, Besser M, Nasser S. Three case reports of anaphylaxis to protamine: Management of anticoagulation reversal. J Thorac Cardiothorac Anesth 2018, 3: 13
- Rubino A, Costanzo C, Stanszus D, Valchanov K, Jenkins D, Sertic F, Fowles JA, Vuylsteke A. Central Veno-Arterial Extracorporeal Membrane Oxygenation (C-VA-ECMO) after cardiothoracic surgery: a single centre experience. J Thorac Cardiothorac Anesth 2018, 32: 1169-74
- Valchanov K and Sturgess J. Complications: an anaesthetist’s rather than a surgeon’s notes. Anaesthesia 2018, 73, Suppl 1: 3-6
- Messer S, Page A, Axell S, Colah S, Hernandez-Sanchez J, Parizkova B, Valchanov K, Dunning J, Parameshwar J, Lewis C, Abu Omar Y, Pettit S, Kydd A, Jenkins D, Sudarshan C, Catarino P, Berman M, Findlay M, Ali A, Tsui S, Large SR. The Journal of Heart and Lung Transplantation 2017; 4: S15-S16
- Kruit N, Valchanov K, Fowles JA, Vuylsteke A. Bleeding complications associated with percutaneous tracheostomy insertion in patients supported with veno-venous extracorporeal membrane oxygen support. J Thorac Cardiothorac Anesth 2017, 32: 1162-1166
- G. Blaudszun, A. Vuylsteke, C. Gerard, V. Zochios, D. Jenkins, K. Valchanov. Patients Discharged from Intensive Care on Dopamine Infusion – A Retrospective Observations Study. J Thorac Cardiothorac Anesth 2017, 31: 1676-1680
- Prabhu M and Valchanov K. Pre-anaesthetic evaluation of the patient with end-stage lung disease. Best Practice and Research Clinical Anaesthesiology 2017, 31:249-260
- Kruit N, Valchanov K, Fowles J-A, Vuylsteke A. Analysis of bleeding complications associated with percutaneous tracheostomy insertion in patients on VV ECMO support over a 10-year period. European J Heart Failure 2017, 5: 1
- Valchanov K. Suturing central venous catheters. Br J Anaesthesia 2017, 18: 805
- Chin JWE and Valchanov K. Pharmacological Management of Post-thoracotomy Pain. World Journal of Anaesthesa 2016; 3: 255-264
- Blaskovics Y, Valchanov K. Anaesthesia for patients with arrhythmogenic right ventricular dysplasia. World J Anesthesiol, 2016; 5: 44-53
- Pavlushkov E, Berman M, Valchanov K. ECMO Cannulation Techniques. Annals of Translational Medicine 2017, 5: 70
- Padvarthan C, Valchanov K. Oxygenator Failure in a Patient with ARDS and Acute Myeloid Leukaemia: A case report. Perfusion 2016, 32: 333-335
- Gomes B, Valchanov K, Davies W, Brown A, Schofield PM. Spinal Cord Stimulation for Refractory Angina: 100 case-experience from the National Refractory Angina Service. Brit J Cardiol 2016, 23: 106-109
- Messer S, Axell R, Colah S, White P, Page A, Parizkova B, Valchanov K, Dunning J, Parameshwar J, Ali A, Tsui S, Large S. Functional assessment of the donor heart following circulatory death and clinical transplantation. J Heart Lung Transplant 2016, 35: S79-S80
- Giménez-Milà M, Videla S, Jenkins D, Klein A, Gerrard C, Nalpon J, Valchanov K. Acute pain, and analgesic requirements after pulmonary endarterectomy with deep hypothermic circulatory arrest. J Cardiovasc Thorac Anesth 2016, 30: 993-996
- Parhar K, Parizkova B, Jones N, Valchanov K, Fowles J-A, Besser M, Telfer P, Kaya B, Vuylsteke A and Rubino A. Extracorporeal membrane oxygenation for the treatment of adult sickle cell acute chest syndrome. Perfusion 2015, 31: 262-265
- Gopalan D, Valchanov K. Respiratory ECMO: Benefits beyond gas exchange. International Journal of Advances in Case Reports 2015, 2: 575-577
- Zochios V, Protopapas A, Valchanov K. Stridor in adult patients presenting from the community: an alarming clinical sign. J Intensive Care Sosiety 2015; 16: 272-273
- Zochios V and Valchanov K. Raised cardiac troponin in intensive care patients with sepsis, in the absence of angiographically documented coronary artery disease. J Intensive Care Society 2015; 16: 52-57
- Rubino A, Vuylsteke A, Jenkins D, Fowles J-A, Hockins L, Valchanov K. Direct complications of Avalon dual lumen cannula use in adult respiratory ECMO patients: a single centre experience. Int J Artif Organs 2014, 37: 741-747
- Valchanov K, Ercole A, Fowles J-A, Parmar J, Gopalan D. Veno-venous ECMO for fat embolism. Journal of Medical Cases 2914; 5: 488-490
- Rubino A, Vuylsteke A, Jenkins D, Fowles J-A, Valchanov K. Direct complications of Avalon dual lumen cannula use in adult respiratory ECMO patients: a single center experience. Int J Artif Organs 2013; 36: 292
- Valchanov K, Goddard M, Ghosh S. Anesthesia for Heart Transplantation in Patients with Arrhythmogenic Right Ventricular Dysplasia: A Case Series. J Cardiovasc Thorac Anesth 2014; 28: 355-357
- Valchanov K. Assessment and management of circulatory failure. APICE 25th Masterclass. Editor: Antonino Gullo. Springer 2013: 23-38
- Salaunkey K, Parameshwar J, Valchanov K, Vuylsteke A. Mechanical support for heart failure. J Int Care Society 2013; 14: 220-225
- Kohler K, Valchanov K, Nias G, Vuylsteke A. ECMO Cannulation. Perfusion 2013, 28:114-124
- Valchanov K, Ghosh S. Perioperative management of hereditary arrhythmogenic syndromes. Letter to the editor. Br J Anaesth 2012; 108: 730-744
- Valchanov K, Klein A. Preoperative assessment of the surgical patient. Foundation Years Journal 2012
- Brown A. Davies W, Davis L, Broughton N, Valchanov K, Schofield P. Long Term Reduction in Symptoms for Refractory Angina by Spinal Cord Stimulation. Anesth Analg 2012; 114(suppl); 1-94
- Valchanov K, Arrowsmith JE. Do venodilators have a role in the perioperative management of heart failure? Eur J Anesth 2012, 29:121-128
- Mydin M, Berman M, Klein A, Tsui S, Dunning J, Valchanov K, Vuylsteke A, Jenkins D. Extracorporeal Membrane Oxygenation as a bridge to Pulmonary Endarterectomy. Ann Thorac Surg 2011; 92: e101-e103
- Ashworth A. and Valchanov K. Antidysrhytmmics. Chapter in Core Topics in Cardiothoracic Anaesthesia. Cambridge University Press 2012
- Broughton N, Brown A, Davies W, Valchanov K, Schofield P. Spinal Cord Stimulators reduce symptoms in refractory angina pectoris at long-term follow up. Anaesthesia 2012; 67: 203
- Hung M, Vuylsteke A, Valchanov K. Extracorporeal membrane oxygenation: coming to an ITU near you. Journal of the Intensive Care Society 2012; 13: 2-9
- Martinez G, Valchanov K. Infective Endocarditis. Review. CPED BJA 2012
- Valchanov K, Kneeshaw J. TOE reporting. Chapter in Core Topics in Transoesophageal Echocardiography 2010. Cambridge University Press
- Hallward G, Valchanov K. An unexpected pre-operative diagnosis. Eur J Echo 2010; 11: 89-90
- Veenith, Sharples L, Gerrard C, Valchanov K, Vuylsteke A. Survival and length of stay following blood transfusion in octogenarians following cardiac surgery. Anaesthesia 2010; 65: 331-336
- Saravanan P, Exley AR, Valchanov K, Casey ND, Falter F. Impact of xenon anaesthesia in isolated cardiopulmonary bypass on very early leucocyte and platelet activation and clearance: A randomised, controlled study. BJA 2010; 103: 805-810
- Mackenzie IS, Cartwright N, Mitchell C, Gurnell M, Brown M, Chatterjee VK, Jamieson NV, Valchanov K, Nashef SAM, Simpson HL. Management of pheochromocytoma in the presence of critical coronary artery disease. J Human Hypertension 2008; 22: S15
- Valchanov K, Wells F. You can love it so much. Case report. Eur J Echo 2008; 9:726
- Steel A, Valchanov K. Preoperative investigation of the surgical patient. Surgery 2008; 9: 363-368
- Valchanov K, Parameshwar J. Management of the heart failure inpatients. Review. CPED BJA September 2008; 8: 167-171
- Valchanov K, Vuylsteke A. Anaesthesia for pulmonary endarterectomy. Core Topics in Thoracic Anaesthesia 2009; 99-104. Chapter
- Runnels S, Valchanov K, Hall R. Echocardiography and ultrasound. Chapter in Core Topics in Cardiothoracic Critical Care 2008; 103-107
- Valchanov K, Ghosh S. Management after thoracic surgery. Chapter in Core Topics in Cardiothoracic Critical Care 2008; 384-389
- Valchanov K, Falter F. Methylene Blue for CPB. Letter. Anesth Analg 2007; 104:1296
- Atanassova P, Tonchev AB, Peneva VN, Chaldakov GN, Valchanov KP, Fiore M, Aloe L. What are subcutaneous adipocytes really good for…? Experimental Dermatology 2007; 16: 56-59
- Valchanov K, Vuylsteke A. Pulmonary Endarterectomy. Review. Eur J Anaesthesia 2006; 23:815-823
- Cook AC, Valchanov KP, Oosthuysen SA. Psoas sheath block for providing analgesia for iliac crest donor site pain. Acute Pain 2004; 6:79-81
- Valchanov K, Peter P, Macanovic M, Taylor J. An unusual cause of acute renal failure: Urethral stricture in female. Nephron 2001; 87: 89-90
- Valchanov K, Proctor G. Enzyme-histochemistry of tryptase in stomach mucosal mast cells of the mouse. J Histochem and Cytochem 1999; 47: 617-22
- Valchanov K, Proctor G, Hartley R, Patherson K, Shori D. Enzyme-histochemistry of rat mast cell tryptase. Histochem J 1998; 30:97-103
- Tonchev A, Valchanov K, Pancheva R, Chaldakov G. Lipopolysaccharide-induced mast cell proliferation in the skin of the rat: prevention by pentoxifylline. Ann Anat 1997; 179:196
- Chaldakov G, Valchanov K, Ghenev P. Role of adventitia in vascular remodelling in hypertension: a trophobiologic view. Biomed Rev 1996; 6: 5-10
- Valchanov K, Tonchev A, Sulaiman O, Chaldakov G. Leydig cell-immune cell interaction: an example of neuroendocrine-immune communication. Editorial. Biomed Rev 1996; 6:1-4
- Valchanov K, Tonchev A, Pancheva R, Andonov M, Ghenev P, Chaldakov G. Cardiac mast cell proliferation: response to estradiol treatment of neonatal rats. Eur J Morphol 1997; 35:65
- Ghenev P, Valchanov K, Tonchev A, Pancheva R, Chaldakov G. Neural-immune links: an emerging concept of adventitial role in atherogenesis. Ann Proc IMAB 1996; 2:172-173
- Chaldakov G, Valchanov K, Tonchev A. Neural-immune-effector trophobiology: Possible implications in psychology of the allergic patient. Allergy 1995; 50:775-776
- Chaldakov G, Ghenev P, Valchanov K, Tonchev A, Pancheva R. Nerve-mast cell-nerve growth factor link: the mast cell as a Yin-Yang modulator in inflammation and fibrosis. Biomed Rev 1995; 4:1-6
- Chaldakov G, Valchanov K, Tonchev A, Ghenev P. The association of mast cells in atherosclerosis: new insights into mast cells in atherogenesis. Hum Pathol 1995; 26:1286
- Chaldakov G, Ghenev P, Andonov M, Valchanov K, Tonchev A, Pancheva R. Neural-immune- effector (NIE) crosstalk in vascular trophobiology: proposal for new and not yet exploited purinergic regulatory mechanisms. Biomed Rev 1994; 3: 81-86
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Research Trials
- LIFEGUARDS Trial
- MiniStern Trial
- Factor VII and Factor XIII post-cardiotomy Trials
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