Dr. Koray Ak
Dr. Koray Ak
Department of Cardiovascular Surgery

Marmara University Medical School, Turkey


2012  Ph.D., Department of Biochemistry, Institute of Medical Sciences, Marmara University, Turkey
2011 Associate Professor of Cardiovascular Surgery, Department of Cardiovascular Surgery, Medical School, Marmara University, Turkey
2005  Cardiovascular Surgeon, Department of Cardiovascular Surgery, Medical School, Marmara University, Turkey

1998  M.D., Medical School, Marmara University, Turkey

Publications (Selected)
  1. Isbir CS, Akgun S, Yılmaz H, Civelek A, Ak K, Tekeli A, Agachan B and Cobanoglu A. Is there a role of angiotensin-converting enzyme gene polymorphism in the failure of arteriovenous femoral shunts for hemodialysis? Ann Vasc Surg. 15: 443-6 (2001)
  2. Isbir CS, Ak K, Kurtkaya O, Zeybek U, Akgun S, Scheitauer BW, Sav A, Cobanoglu A. Ischemic Preconditioning and Nicotinamide in Spinal Cord Protection in an Experimental Model of Transient Aortic Occlusion. Eur J of Cardiothorac Surg. 23: 1028-1033 (2003)
  3. Akgun S, Tekeli A, Kurtkaya O, Civelek A, Isbir CS, Ak K, Arsan S, and Sav A. Neuroprotective effects of FK-506, L-carnitine and azathioprine on spinal cord ischemia-reperfusion injury. Eur J Cardiothorac Surg. 25: 105-10 (2004)
  4. Arsan S, Ak K, Isbir SC. Clopidogrel in coronary artery surgery. Eur J Cardiothorac Surg. 26: 869 (2004)
  5. Akgun S, Tekeli A, Isbir SC, Civelek A, Ak K, Sirvanci S, Arbak S, Yaylim I, Arsan S. FK506 to prevent lung injury after hindlimb ischemia and reperfusion in a rat model: an electron microscopic study. Surg Today. 34: 678-84 (2004)
  6. Ak K, Akgun S, Tecimer T, Isbir C.S, Civelek A, Tekeli A, Arsan S, Cobanoglu A. Determination of Histopathologic Risk Factors For Postoperative Atrial Fibrillation in Cardiac Surgery. Ann Thorac Surg 79: 1970-5 (2005)
  7. Isbir S, Ak K, Aksoy N. Platelet function tests predict bleeding and thrombotic events after off-pump coronary bypass grafting. Eur J Cardiothorac Surg. 28: 514 (2005)
  8. Ak K, Tekeli A, Isbir S. Apoptosis in ischemic spinal cord injury. J Thorac Cardiovasc Surg. 131:1212-3 (2006)
  9. Isbir SC, Ak K, Tekeli A, Civelek A, Atalan N, Arsan S. Coronary artery bypass grafting in idiopathic myelofibrosis: a case report. Heart Surg Forum. 10:E55-6 (2007)
  10. Ak K, Wimmer-Greinecker G, Dzemali O, Moritz A, Dogan S.Totally endoscopic sequential arterial coronary artery bypass grafting on the beating heart. Can J Cardiol. 23: 391-2 (2007)
  11. Civelek A, Ak K, Kurtkaya O, Tekeli A, Isbir S, Nargileci E, Arsan S, Sav A. Effect of a low molecular weight heparin molecule, dalteparin, on cellular apoptosis and inflammatory process in an incisional wound-healing model. Surg Today. 37: 406-11 (2007)
  12. Ak K, Dogan S. Carotid artery cannulation in aortic surgery. J Thorac Cardiovasc Surg. 133:1392 (2007)
  13. Isbir SC, Tekeli A, Ergen A, Yilmaz H, Ak K, Civelek A, Zeybek U, Arsan S. Genetic polymorphisms contribute to acute kidney injury after coronary artery bypass grafting. Heart Surg Forum. 10:E439-44 (2007)
  14. Ak K, Aybek T, Wimmer-Greinecker G, Ozaslan F, Bakhtiary F, Moritz A, Dogan S. Evolution of surgical techniques for atrial septal defect repair in adults: a 10-year single-institution experience. J Thorac Cardiovasc Surg. 134: 757-64 (2007)
  15. Ak K, Isbir S, Tekeli A, Ergen A, Atalan N, Dogan S, Civelek A, Arsan S. Presence of lipoprotein lipase S447X stop codon affects the magnitude of interleukin 8 release after cardiac surgery with cardiopulmonary bypass. J Thorac Cardiovasc Surg. 134: 477-83 (2007)
  16. Bakhtiary F, Therapidis P, Dzemali O, Ak K, Ackermann H, Meininger D, Kessler P, Kleine P, Moritz A, Aybek T, Dogan S. Impact of high thoracic epidural anesthesia on incidence of perioperative atrial fibrillation in off-pump coronary bypass grafting: a prospective randomized study. J Thorac Cardiovasc Surg. 134: 460-4 (2007)
  17. Papadopoulos N, Klein C, Ak K, Moritz A. Autologous repair of an internal carotid artery aneurysm by resection, caliber reduction, and external mesh tube reinforcement in a 9-year-old boy. J Vasc Surg. 46: 1280-2 (2007)
  18. Civelek A, Ak K, Akgün S, Isbir SC, Arsan S. Tricuspid valce replacement: analysis of risk factors and outcomes. Thorac Cardiovasc Surg. 56: 456-60 (2008)
  19. Ak K, Beşir Y. What is the ideal patch material for ASD closure? Ann Thorac Surg. 86: 692-3 (2008)
  20. Akgun S, Ak K, Tugrular S, Civelek A, Isbir C, Arsan S. Median sternotomy for an unexpected complication of permanent hemodialysis catheters: "stuck catheter". Vasa. 37: 293-6 (2008)
  21. Ak K, Isbir S, Arsan S. A simple maneuver on sternal saw facilitates to perform curved sternal mini-incisions like J- and C-shaped partial sternotomies. J Card Surg. 24: 454-6 (2009)
  22. Dumantepe M, Ak K, Mungan U, Alp I, Inan BK, Yilmaz AT. Blood cyst of the right ventricle presenting as recurrent high fever and chills in an adult. Ann Thorac Surg. 87: 638-40 (2009)
  23. Ak K, Adademir T, Isbir S, Arsan S. Right ventricular mural endocarditis presenting as an isolated apical mass in a non-addict patient with congenital deafness and aphasia. Interact Cardiovasc Thorac Surg. 8: 498-500 (2009)
  24. Ak K, Isbir CS, Tetik S, Atalan N, Tekeli A, Aljodi M, Civelek A, Arsan S. Thromboelastography-based transfusion algorithm reduces blood product use after elective CABG: a prospective randomized study. J Card Surg. 24: 404-10 (2009)
  25. Inan BK, Ucak A, Temizkan V, Ak K, Sen H, Yilmaz AT. Pulmonary Vascular Protective Mechanisms in adult patients with an isolated large ventricular septal defects. J Card Surg. 24: 742-7 (2009)
  26. Tetik S, Ak K, Isbir S, Eksioglu-Demiralp E, Arsan S, Iqbal O, Yardimci T. Clopidogrel Provides Significantly Greater Inhibition of Platelet Activity Than Aspirin When Combined With Atorvastatin After Coronary Artery Bypass Grafting: A Procpective Randomized Study. Clin Appl Thromb Hemost. 16: 189-98 (2010)
  27. Tetik S, Ak K, Sahin Y, Gulsoy O, Isbir S, Arsan S, Yardimci T.Postoperative Statin Therapy Attenuates the Intensity of Systemic Inflammation and Increase Fibrinolysis After Coronary Artery Bypass Grafting.Clin Appl Thromb Hemost. 17: 526-31 (2010)
  28. Gürsu O, Isbir S, Ak K, Ozben B, Türköz HK, Dal D, Arsan S. Testicular germ cell tumor metastatic to the right atrium. J Card Surg. 26: 276-9 (2011)
  29. Inan BK, Ucak A, Temizkan V, Guler A, Ak K, Ugur M, Alp I, Arslan G, Yilmaz AT. Natural internal banding in adult patients with a large ventricular septal defect and a preserved pulmonary vascular system. Heart Surg Forum. 14: E202-6 (2011)
  30. Ak K, Arsan S, Akalın F, Gursu O, Isbir S. Autologous Right Pulmonary Artery Tissue for Repair of Left Pulmonary Artery Originating from Left Patent Ductus Arteriosus in a Patient With Tetralogy of Fallot and Absent Pulmonary Valve. Pediatr Cardiol. 32:986-9 (2011)
  31. Baris S, Saricoban HE, Ak K, Ozdemir C. Papaverine chloride as a topical vasodilator in accidental injection of adrenaline into a digital finger. Allergy 66:1495-6. (2011)