Division of Cardiology

Sebastian Ribas


Associate Professor, Division of Cardiology, Department of Medicine






Education and Professional Standing

Dr Ribas was born in New York, but raised in Santiago del Estero, Argentina. He holds an MD degree from the National University of Cordoba, and a Cardiology Specialist degree from the Catholic University of Cordoba, Argentina. He moved to Canada in 2002, when he did his training in electrophysiology and cardiac rhythm devices. He is a staff Cardiologist at McMaster since 2005.

Clinical Interests

  • Clinical and interventional electrophysiology
  • Postgraduate training of fellows during EP procedures/device implants
  • Cardiology rotation supervisor for GIM at St Joseph’s Healthcare General Cardiology

Selected Publications

  1. Divakara Menon SM, Ribas CS, Ribas Meneclier CA, Morillo CA. Intermittent atrioventricular block: What is the mechanism? Heart Rhythm. 2010 Nov 9.
  2. Menon SM, Ribas CS, Hussein MH, Morillo CA. Case of long RP tachycardia responsive to adenosine: What is the mechanism? Heart Rhythm. 2010 Sep 22.
  3. Nery PB, Fernandes R, Nair GM, Sumner GL, Ribas CS, Menon SM, Wang X, Krahn AD, Morillo CA, Connolly SJ, Healey JS.Device-related infection among patients with pacemakers and implantable defibrillators: incidence, risk factors, and consequences. J Cardiovasc Electrophysiol. 2010 Jul;21(7):786-90. Epub 2010 Jan 2.
  4. Robinson M, Healey JS, Eikelboom J, Schulman S, Morillo CA, Nair GM, Baranchuk A, Ribas S, Evans G, Connolly SJ, Turpie AG. Postoperative low-molecular-weight heparin bridging is associated with an increase in wound hematoma following surgery for pacemakers and implantable defibrillators. Pacing Clin Electrophysiol. 2009 Mar;32(3):378-82.
  5. Baranchuk A, Kang J, Shaw C, Campbell D, Ribas S, Hopman WM, Alanazi H, Redfearn DP, Simpson CS. Electromagnetic interference of communication devices on ECG machines. Clin Cardiol. 2009 Oct;32(10):588-92.
  6. Baranchuk A, Divakaramenon S, Ribas S, Morillo CA.Hypertrophic cardiomyopathy and tachyarrhythmias detected by a pacemaker. Arq Bras Cardiol. 2009 Mar;92(3):e13-5.
  7. Divakara Menon SM, Healey JS, Nair GM, Ribas CS, Baranchuk A, Nery PB, Sumner GL, Connolly SJ, Morillo CA. A case of long-RP tachycardia: what is the mechanism? J Cardiovasc Electrophysiol. 2009 Jun;20(6):702-4. Epub 2009 Feb 2.
  8. Baranchuk A, Ribas S, Divakaramenon S, Morillo CA. Real time intracardiac electrograms for the diagnosis of pacemaker malfunction. Medicina (B Aires) 2008;68(1):62-4. Spanish.
  9. Ribas CS, Baranchuk A, Connolly SJ, Morillo CA. Narrow QRS tachycardia with long R-P. Int J Cardiol. 2008 Jul 4;127(2):e57-60. Epub 2007 Jun 22.
  10. Baranchuk A, Ribas S, Divakaramenon S, Morillo CA. An unusual mechanism causing inappropriate implantable cardioverter defibrillator shocks: transient reduction in R-wave amplitude. Europace. 2007 Aug;9(8):694-6. Epub 2007 May 3.