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Adj A/Prof Michael George Caleb

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  • Senior Consultant, Adult Cardiac Surgery, Department of Cardiac, Thoracic and Vascular Surgery, National University Heart Centre, Singapore


MBBS, MMed Surgery, FAMS


Cardiothoracic Surgery

Clinical Disciplines/Programmes:

Adult Cardiac Surgery

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Adj A/Prof Michael George Caleb graduated from Yong Loo Lin School of Medicine, National University of Singapore with MBBS in 1987. He passed the PRCS Edin in 1991 and the Conjoint FRCS (Edin) / Masters Med (Surgery) S'pore in 1992. He underwent advanced cardiac specialty training at the Cleveland Clinic, Ohio, United States of America and The Peter Munk Cardiac Centre at University of Toronto, Canada from 1996 to 1998.

He was a Senior Consultant heart surgeon at The National Heart Centre, Singapore till 2005 and joined the National University Hospital in 2005, where he is currently a Senior Consultant at the National University Heart Centre, Singapore (NUHCS).

In 2012, Adj A/Prof Michael George Caleb became the department head of the Department of Cardiac, Thoracic and Vascular Surgery (CTVS), NUHCS.

His abilities and special interests include:

  • All aspects of mechanical heart support for acute and chronic heart failure, including the use of extracorporeal membrane oxygenation, temporary ventricular assist devices and implantable long term mechanical pumps.
  • Beating heart (off-pump) coronary bypass surgery including all arterial graft surgery. Minimally invasive endoscopic vein harvesting for coronary bypass surgery. Mitral valve repair for complex lesions including bileaflet repairs.
  • Radiofrequency ablation (RFA-MAZE) for chronic and paroxysmal atrial fibrillation. RFA is added to the mitral valve repairs thereby avoiding warfarin in this group of patients.
  • Heart failure surgery for end stage heart failure as an alternative to heart transplants. This includes left ventricular reshaping (DOR) and mitral valve annular reduction.
  • Stentless aortic valve surgery for elderly patients with small aortic roots, thereby avoiding merchanical valves and warfarin anticoagulation.
  • Open thoracic aneurysm surgery including arch aneurysms, in combination with endovascular stenting, where required.
  • Transmyocardial laser revascularization
  • All aspects of lung surgery, including Video Assisted Thoracoscopic Surgery.
  • All aspects of vascular surgery.

Journals & Publications

Selected Publications:

  1. Miniaturized versus conventional cardiopulmonary bypass and acute kidney injury after cardiac surgery. Chew S, Ng R, Liu W, Goh SG, Caleb MG, Ti LK. Perfusion. 2015 Apr 24.
  2. Ethical dilemmas of adult ECMO: emerging conceptual challenges. Ramanathan K, Cove ME, Caleb MG, Teoh KL, Maclaren G. J Cardiothorac Vasc Anesth. 2015 Feb;29(1):229-33.
  3. The inflammatory response between miniaturised and conventional cardiopulmonary bypass after cardiac surgery in an Asian population. Ng R, Chew S, Liu W, Ong P, Caleb M, Ti L. Perfusion. 2014 Dec 11.
  4. Resolution of ascending aortic dissection in a Stanford type A patient. Kong CH, Lin XY, Caleb MG, Sorokin VA. Ann Thorac Surg. 2013 Sep;96(3):1066-7.
  5. Pericardiophrenic artery embolisation for control of massive haemoptysis. Bhasin A, Venkatesh SK, Caleb MG. Singapore Med J. 2011 May;52(5):e104-7.
For more publications, click here.

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