Centers & Specialties

Heart Center

Transplant Center

Clinical Interests
  • Advanced Heart Failure
  • Mechanical circulatory support
  • Heart transplant
  • Hemodynamics
Medical Education
  • MD, University of Toronto Faculty of Medicine
  • Residency, University of Toronto
  • Fellowship, Brigham and Women's Hospital|Fellowship, Columbia University Medical Center|Fellowship, Tufts Medical Center|Fellowship, University of Toronto
Board Certifications
  • Internal Medicine
  • Cardiovascular Disease
  • Advanced Heart Failure and Transplant Cardiology
Insurances Accepted
  • Aetna Health Inc.
  • AllWays Health (NHP) - ACD
  • AllWays Health (NHP) - PBO
  • Beech Street
  • Blue Cross Blue Shield - Blue Care 65
  • Blue Cross Blue Shield - Indemnity
  • Blue Cross Blue Shield - Managed Care
  • Blue Cross Blue Shield - Partners Plus
  • BMC HealthNet Mass Health MCO/ACO
  • Cigna (PAL #'s)
  • Commonwealth Care Alliance
  • Fallon Community HealthCare
  • Great-West Healthcare (formally One Health Plan)
  • Harvard Pilgrim Health Plan - ACD
  • Harvard Pilgrim Health Plan - PBO
  • Health Care Value Management (HCVM)
  • Humana/Choice Care PPO
  • MassHealth
  • Medicare
  • Medicare - ACD
  • OSW - Maine
  • OSW - New Hampshire
  • OSW - Rhode Island
  • OSW - Vermont
  • Private Health Care Systems (PHCS)
  • Railroad Medicare
  • Railroad Medicare - ACD
  • Senior Whole Health
  • TriCare
  • Tufts Health Plan
  • Unicare
  • United Healthcare (non-HMO) - ACD
  • United Healthcare (non-HMO) - PBO
  • Well Sense Pediatrics

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.

Patient Age Group
Provider Gender


Dr. Sunu Thomas joined the Cardiology Division at the Massachusetts General Hospital in July 2014 specializing in advanced heart failure, cardiac transplantation and mechanical circulatory support.  After completing his medical education and Adult Cardiology training at the University of Toronto, he pursued his interest in advanced heart disease with fellowships at the Brigham and Women's Hospital  and completed a specialized year of training dedicated to mechanical circulatory support therapies at Columbia Univeristy Medical Center.  He broadened his expertise in hemodynamics and interventional heart failure therapies with a full interventional cardiology fellowship at Tufts Medical Center. 

At the Massachusetts General Hospital, he is the Medical Director of the Cardiac ECMO program and Co-Director of the Resynchronization and Advanced Cardiac Therapeutics (ReACT) Program.  His primary clinical and research interests focus on the use of mechanical circulatory support strategies as heart replacement therapies in patients with acute and chronic heart failure syndromes.

Research & Publications


View my most recent publications at PubMed

News & Events

  • Atrial Fibrillation and Heart Failure Prevention: Do We Need a Risk Score?

    Atrial fibrillation (AF) and heart failure (HF) are individual serious conditions with shared molecular and structural changes. Shared predisposition suggests a common pathophysiology that should be probed to understand the overlap and use it to optimize care

  • New Strategies for Heart Failure Patients

    Cardiac resynchronization therapy (CRT) is one of the most common treatments for patients with moderate to severe heart failure, and it involves placing a biventricular pacing device to resynchronization contraction of the heart’s ventricles.


Cardiac Catheterization Lab, MGH
55 Fruit Street
Boston, MA 02114-2696
Phone: 617-643-7249