Physician Detail

Steven Lloyd Zweibel, MD, FACC, FHRS, CCDS

System Director of Electrophysiology, Hartford HealthCare Heart & Vascular Institute

4.9 /5
98 surveys


Hartford HealthCare Medical Group


Cardiac Electrophysiology, Board Certified < Accepting new patients for this specialty
Cardiovascular Medicine, Board Certified < Not accepting new patients for this specialty
Internal Medicine, Board Certified < Not accepting new patients for this specialty

Areas of Interest

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, Postural Orthostatic Tachycardia Syndrome (POTS), Premature Ventricular Complexes (PVCs), Right Ventricular Cardiomyopathy, Sudden Cardiac Death, Supraventricular Tachycardia (SVT), Syncope, Tilt Table Testing, Ventricular Fibrillation (VF), Ventricular Tachycardia (VT)

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

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Office Locations

  • Hartford HealthCare Heart & Vascular Institute

    420 Saybrook Road
    Middletown, CT 06457
    Get Directions >>

    Phone: 860.636.2010

  • Hartford HealthCare Heart & Vascular Institute Wellness Center at Blue Back Square

    65 Memorial Road
    Suite 405
    West Hartford, CT 06107
    Get Directions >>

    Phone: 860.972.1506
    Fax: 860.545.3999

  • Hartford HealthCare Heart & Vascular Institute at Hartford Hospital

    85 Jefferson Street
    Suite 701
    Hartford, CT 06106
    Get Directions >>

    Phone: 860.972.1506
    Fax: 860.545.3999


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.

Big news in the world of pacemakers…The world’s smallest pacing device - equivalent to the size of a vitamin - is now on the market and Hartford Hospital is one of only a few centers selected to implant the Micra AV.

Dr. Steven Zweibel is System Director of Cardiac Electrophysiology at the Hartford HealthCare Heart and Vascular Institute.

Q. First, how was Hartford Hospital selected to be one of the first to implant the Micra AV.

A. We have always had a strong relationship with Medtronic, the company that developed the Micra AV, including many research projects and have also implanted many of the first generation of the lead-less pacemaker, the Micra.

Q. I understand the Micra AV is a lead-less pacemaker…what does that mean…

A. The traditional pacemakers that have been implanted to date have used leads, which are basically wires that transmit electrical impulses into the heart, that are connected to the pacemaker generator which is placed under the tissue in the upper chest. The Micra pacemaker is completely self-contained – there are no leads – the entire pacemaker is implanted through a vein in the leg and attaches to the inside of the heart. Data has demonstrated that there is a lower risk of complications with the Micra lead-less pacemaker compared to a standard pacemaker.

Q. How is the Micra AV different from the Micra device…

A. The Micra device only paces the lower chamber of the heart – the ventricle – and doesn’t take the activity of the upper chambers of the heart into account. We typically use these devices for patients that are in permanent atrial fibrillation. The newer Micra AV device has special sensors embedded that can detect when the upper chambers of the heart contract and can time the pacing in the lower chamber to help coordinate the upper and lower chambers.

Q. What conditions are you treating with the Micra AV and are more patients qualifying for this type of pacemaker?

A. The Micra AV will be used in patients who don’t need pacing in the upper chambers of the heart (the atria) but who have a condition called heart block – when the upper chambers and lower chambers are disconnected from each other electrically. This will enable us to use many more lead-less pacemakers for our patients given this additional ability of the Micra AV.

If you would like to learn more call 1.833.444.0014.

A conversation with Dr. Steven Zweibel, Director of Cardiac Electrophysiology at the Hartford HealthCare Heart and Vascular Institute about a Bluetooth-compatible pacemaker.

HHC: Explain how the technology works.

Dr. Zweibel: Up until now, a patient would need to have a separate monitor that we provide to them that would be plugged into an outlet at their bedside. The monitor and pacemaker communicate with each other so we can remotely monitor the function of the patient’s pacemaker. Studies have shown that this remote monitoring is good for patients and reduces mortality. However, these new devices have a Bluetooth chip and an app installed on their smartphone that allows this monitoring to be done via their mobile device. The same information that we receive via the bedside monitor can now be sent via their mobile device which can give us more timely information about arrhythmias or issues with the device or leads. Since the app on the patient’s mobile device is a piece of software, there is the ability to upgrade the app to provide new functionality. An example of an advance that I can envision in the future would be the ability for the device to detect when a patient has fallen and contact a family member or healthcare provider automatically.

HHC: How secure is the transfer of patient data?

Dr. Zweibel: The data between the patient’s pacemaker and mobile device is fully encrypted as is the data going from the mobile device to Medtronic and then to our device clinic. It is very important to note that the patient’s pacemaker works completely independently from their mobile device and that no changes to the programming of the pacemaker can be done via the patient’s mobile device.

HHC: Is this new pacemaker compatible with MRI imaging?

Dr. Zweibel: Yes. Actually, most devices including pacemakers and defibrillators that we implant at Hartford Hospital are MRI conditional and have been for a few years. This new pacemaker is no exception. This has been a great advance for our patients to allow them to have the option of having an MRI scan.

HHC: Aside from the NEW technology, there is improved longevity in this particular pacemaker, tell us more about the benefits of this?

Dr. Zweibel: Device companies have been working very hard on battery and circuitry technology to make these devices last as long as possible. I used to tell patients that their pacemaker would last 7 to 10 years but now I can safely tell them that they should expect to get at least 12 to 14 years from their pacemaker battery. This will lead to fewer operations to replace their device when the battery becomes depleted.



Medical School

  • New York University School of Medicine 1992 MD


  • Columbia-Presbyterian Medical Center


  • New York Presbyterian Hospital
  • Columbia-Presbyterian Medical Center


  • Montefiore Hospital and Medical Center
  • Albert Einstein College of Medicine


  • Brandeis University

Faculty Appointments

University of Connecticut School of Medicine, Medicine, Assistant Professor

Professional Organizations

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


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Insurance Accepted*

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, HMC/ Northeast Healthcare, Medspan Commercial, Medspan Medicare, 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.

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