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Zweibel, Steven Lloyd, MD, FACC, FHRS, CCDS

System Director of Electrophysiology, Hartford HealthCare Heart & Vascular Institute




English, Spanish

Providing the best care to our patients and their companions requires communicating in a way everyone understands. Interpreter services are available 24 hours a day, 7 days a week, 365 days a year. All spoken languages are available, as well as American Sign Language (AS/L).

Accepting New Patients

Cardiac Electrophysiology

Not Currently Accepting New Patients

Cardiovascular Medicine

Internal Medicine

Areas of Expertise
Antiarrhythmic Medications, Atrial Fibrillation, Atrial Fibrillation Ablation, Atrial Flutter, Brugada Syndrome, Cardiac Arrest, Cardiac Arrhythmias, Cardiac Device Infections, Cardiac Pacing, Cardiac Resynchronization Therapy (CRT), Cardiomyopathy, Catheter Ablation, Congestive Heart Failure (CHF), Cryoablation, Hypertrophic Cardiomyopathy, Implantable Cardiac Defibrillators (ICDs), Implantable Loop Recorders, Lead Extraction, Long QT Syndromes, Pacemakers, Palpitations, Premature Ventricular Complexes (PVCs), Right Ventricular Cardiomyopathy, Sudden Cardiac Death, Supraventricular Tachycardia (SVT), Syncope, Tilt Table Testing, Ventricular Fibrillation (VF), Ventricular Tachycardia (VT)


Montefiore Hospital and Medical Center
Albert Einstein College of Medicine

Columbia-Presbyterian Medical Center

Medical School
New York University School of Medicine

New York Presbyterian Hospital
Columbia-Presbyterian Medical Center

Brandeis University

Professional Organizations

  • American College of Cardiology, Fellow
  • Heart Rhythm Society, Fellow
  • American Medical Association


Verified Patient Reviews

5 out of 5 stars

Wonderful people very caring.

5 out of 5 stars

Excellent doctor nurses staff.

5 out of 5 stars

It was a pleasure meeting *Dr. Zweibel. He reviewed my records, explained findings and discussed options and a plan to have further testing done. I highly recommend *Dr. Zweibel.

5 out of 5 stars

Everything well explained and when I left I felt very good about the procedure that I would have

Other Reviews from Around the Web

5 out of 5 stars

Dr. Zwiebel explains things very well, and doesn't make you feel hurried. He has a rational as well as professional approach.


Dr. Zweibel oversees the Hartford HealthCare Heart and Vascular Institute's Electrophysiology program and treats patients with complex electrical heart disorders.

His areas of interest include device lead extractions and implantation of cardiac devices.

He oversees a team of six cardiac electrophysiologists along with APRNs, nurses, technicians, and office assistants to provide world class treatment for our patients with heart rhythm disorders.

He has conducted extensive research on complex electrical heart disorders. Most recently, he has been involved in studies examining different methods of how cardiac defibrillators stop fatal heart rhythms as well as a study examining if external defibrillators are useful at stopping dangerous heart problems after a heart attack.

He is board certified in Clinical Cardiac Electrophysiology and Cardiovascular Disease with the American Board of Internal Medicine.

In 2003, he received the highest physician score worldwide on the North American Society of Pacing and Electrophysiology certification exam, now known as the International Board of Heart Rhythm Examiners exam.

Prior to joining the Hartford Hospital Medical Staff in 2008, Dr. Zweibel was with Lenox Hill Hospital in New York and was the Director of Electrophysiology at Sound Shore Medical Center in New Rochelle, NY.


Aetna, Anthem, BCBS Medicare, CarePartners of Connecticut, Cigna Healthcare, Colonial Cooperative Care, Community Health Network of Connecticut, Inc., Connecticare, Connecticare Commercial, Connecticare Medicare, Corvel, Coventry, Essence Healthcare, Evercare, First Health Group Corp., Focus, Harvard Pilgrim, Health Connecticut, Health Direct, Health New England, Healthy Connecticut, Multiplan, Northeast Health Direct, One Health Plan/ Great-West Healthcare, Oxford Health Plans, Prime Health Services, Private Health Care Systems, Inc., Senior Whole Health, United Healthcare, WellCare of Connecticut, Inc.

This information is subject to change at any time. Please check with your insurance provider before scheduling your appointment or receiving services to confirm they are a participating member of the Hartford HealthCare network.