About Jag Singh, MD, PhD

Clinical Interests:

Treats:

Languages:

Locations

Mass General Heart Center
55 Fruit St.
Boston, MA 02114
Phone: 866-644-8910

Mass General: Demoulas Center for Cardiac Arrhythmias
55 Fruit St.
Boston, MA 02114
Phone: 617-724-4500

Medical Education

  • MBBS, University of Poona, B.J. Medical College, India
  • Residency, David Sassoon General Hospital,Poona, India
  • Residency, King Edward Memorial Hospital, Bombay, India
  • Residency, Massachusetts General Hospital
  • Fellowship, Framingham Heart Study, BU School of Medicine
  • Fellowship, John Radcliffe Hospital

American Board Certifications

  • Cardiovascular Disease, American Board of Internal Medicine
  • Clinical Cardiac Electrophysiology, American Board of Internal Medicine

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


Research

  • Risk stratification for sudden cardiac death and worsening heart failure. Dr. Singh has done extensive work with the Framingham Heart Study and the MADIT Study group and published several landmark manuscripts.
  • Patient selection and predicting response to cardiac resynchronization therapy. Dr. Singh has developed and built a new multidisciplinary program at Massachusetts General Hospital to care for patients with heart failure and implanted devices. His research work has led to the development of a novel response score to predict clinical outcome in this patient group.
  • Coronary venous anatomy and novel ventricular lead implantation strategies. Dr. Singh has used novel rotational venography and imaging techniques to propose and substantiate new coronary venous anatomy classification and redefine the best views for lead implantation. Dr. Singh published on the importance of left ventricular lead position and developed new implantation protocols, some of which are being tested prospectively in clinical studies.
  • Image integration strategies and multimodality imaging for cardiac resynchronization therapy. Dr. Singh has done some novel work integrating computed tomography, ultrasound and fluoroscopy to create better clinical strategies to facilitate device implantation.
  • Device diagnostics and remote monitoring in heart failure patients. Dr. Singh's recent work has focused on the use of remote monitoring and device diagnostics to prognosticate and manage patients.
  • Newer drugs and catheter ablation strategies of atrial fibrillation. Dr. Singh is actively engaged in research examining newer drug therapies for atrial fibrillation. His research interests also examine novel approaches to enhance patient selection, imaging and ablative techniques for treating atrial fibrillation.

Publications

  • Select Publications:

    • Singh JP et al. Abnormal rate adaptation of the QT interval is associated with hypertensive left ventricular hypertrophy. J Am Coll Cardiol 1997;29:778.
    • Singh JP et al. Heritability of heart rate variability: the Framingham Heart Study. Circulation, 1999;99: 2251.
    • Singh JP et al. Factors influencing appropriate firing of the implanted defibrillator for ventricular tachycardia/fibrillation: findings from MADIT II. J Am Coll Cardiol 2005 46:1712.
    • Singh JP et al. Coronary venous anatomy: a segmental approach to aid cardiac resynchronisation therapy. J Am Coll Cardiol . 2005;46:68.
    • Heist EK et al, Singh JP. Usefulness of a Novel Response Score to Predict Hemodynamic and Clinical Outcome from Cardiac Resynchronization Therapy. Am J Cardiol. 2006;97:1732-6.
    • Singh JP, et al. Left ventricular lead electrical delay predicts response to cardiac resynchronization therapy Heart Rhythm. 2006;3:1285.
    • Tournoux F et al, Singh JP. Echocardiographic Measures of Acute Hemodynamic Response after Cardiac Resynchronization Therapy Predict Long-term Clinical Outcome. European Heart Journal, 2007;28:1143.
    • Singh JP. Electrical Therapy for Advanced Heart Failure: Is it Time for a Multidisciplinary Approach or a New Subspecialty? Expert Rev Cardiovasc Ther. 2007;5:811.
    • Singh JP et al. Patient selection and classification for atrial fibrillation ablation: Thinking beyond duration. 2009;6:1522.
    • Upadhyay G et al, Singh JP. Cardiac Resynchronization in Patients with Atrial Fibrillation: a Meta-analysis of Prospective Cohort Studies. J Am Coll Cardiol 2008;52:1239.

Reviews: Comments and Ratings

4.9out of 5(132 Ratings, 57 Comments)

May 2025

Wonderful experience. He is a fabulous physician and an empathetic care provider. And very thorough.


April 2025

Spent time listening to me about my health problem. He was very helpful in explaining what I should do about my heart , medications etc.


April 2025

Best physician experience ever - since the last time at Mass General - 4-5 years ago. Bright, fit, knowledgeable, good listener, open minded, knowledgeable about latest data, perfectly groomed and dressed - an outstanding example of health, education, and compassion


April 2025

My husband and I were very impressed with Dr. Singh. He explained everything so that we could understand, he even drew a picture. He also explained what I might need in the future should I need it. Very pleased.


April 2025

Excellent! Very easy to talk to. Incredible listening skills. Educated me on the subject and made me feel more relaxed.


April 2025

Dr. Singh is a wonderful care provider. He is very thorough and always takes the time to explain all and answer any questions.


April 2025

he is the best provider


April 2025

Dr. Singh spent a lot of time with me answering all my questions, giving me all kinds of information that I would not have expected him to do. I'm very happy with my visit.


April 2025

I just want to share with my experience. I saw the doctor and all the nurse and I want to tell you I have the best experience ever and doctor is like more knowledgeable, more experienced, more professional and plus he is very friendly, he is very polite and he really cares about patients, about medication, about treatment. I think it's the best ... Read More


March 2025

This was my first visit with Dr. Singh and I thought it went very well. I felt like he listened to my concerns and he provided me in the detail that I needed the information on the next steps. So I was pleased with the visit.

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