About Leon Ptaszek, MD, PhD

Dr. Ptaszek received his M.D. and Ph.D. degrees from the Mount Sinai School of Medicine. He completed his internal medicine residency training at the Stanford University School of Medicine, and then completed fellowships in cardiology and clinical cardiac electrophysiology at the Massachusetts General Hospital. He is board certified in internal medicine, cardiovascular diseases, and clinical cardiac electrophysiology. Dr. Ptaszek is an Assistant Professor of Medicine at Harvard Medical School and MGH.His clinical interests focus on the management of patients with heart rhythm disorders. Dr. Ptaszek performs catheter ablations of supraventricular tachycardias (SVTs) and premature ventricular contractions (PVCs). He also implants pacemakers, implantable cardioverter defibrillators (ICDs), and cardiac resynchronization therapy (CRT) devices. His research interests include the development of novel ablation catheters and high-resolution arrhythmia mapping systems.

Departments, Centers, & Programs:

Clinical Interests:

Treats:

Locations

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

Waltham: Mass General Waltham

Mass General Heart Center at Waltham
52 Second Ave.
Suite 570
Waltham, MA 02451
Phone: 781-487-6000

Medical Education

  • MD, Mount Sinai School of Medicine
  • Residency, Stanford University School of Medicine
  • Fellowship, Massachusetts General 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.


Reviews: Comments and Ratings

4.8out of 5(450 Ratings, 168 Comments)

June 2025

Dr Ptaszek has been my Arrhythmia Specialist since [redacted]. Always a pleasure to see him . [redacted]


June 2025

He arrived 90 minutes late for my appointment and then seemed rushed when he did arrive. He did seem to have a thorough understanding of my case but didn't seem too interested to help me understand my situation. I believe he was making very sound medical recommendations but not in a manner that made me comfortable with why and what input I may or ... Read More


June 2025

All of the people at the Waaltham facility that I had contact with were highly professional and gave me excellent care. I always (all ways) feel well taken care of.


June 2025

Dr. Ptaszek is smart, professional, interpersonal, and communicative. He is excellent and interested in fixing ailments. I recommend him very highly!


June 2025

Very satisfied.


June 2025

All went well


June 2025

Simply very pleasant.


June 2025

Always provides exceptional care


June 2025

Highly competent and attentive


June 2025

Very happy with experience

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