Cardiac Electrophysiology

Contact Us!

For more information or to make a Cardiac Electrophysiology appointment, call 203-916-5670.

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Expert, Compassionate Care for Abnormal Heart Rhythms

Griffin Faculty Physicians Cardiac Electrophysiology provides expert, patient-centered care for hearts that beat too slow (less than 60 beats per minute), too fast (more than 100 beats per minute), or unevenly. Our advanced diagnostic and treatment services for heart arrhythmias can get you back to enjoying life without skipping a beat.

With more than 25 year of experience in cardiac electrophysiology, arrhythmia care and interventional cardiac electrophysiology, we specialize in a wide scope of advanced procedures and technology, including:

  • Pacer/Defibrillator Implantation
  • Cardiac Resynchronization Therapy
  • Subcutaneous Aicd Implantation
  • Micra™ Implantation
  • Linq™ Implantable Cardiac Monitor
  • Atrial Fibrillation Ablation
  • Firm Ablation
  • Hybrid Atrial Fibrillation Ablation
  • Balloon Cyroablation of Atrial Fibrillation
  • Radiofrequency Catheter Ablation of Arrhythmias
  • Contact Force Sensing Ablation Catheter
  • His Bundle Pacing
  • Rhythmia Hdx Mapping System
  • Dv-8 Esophageal Retractor System and Circa-S Temperature Probe

Getting to the Heart of the Matter with Cardiac Electrophysiology

Intermittent heart palpitations feel like your heart is racing, pounding, skipping, jumping or beating very slowly with pauses. These palpitations can be frightening, making it important to find out the cause so you can feel better and prevent serious problems.

Cardiac electrophysiology focuses on your heart’s electrical activity to locate the source of the abnormal heartbeat (arrhythmia). Electrical signals usually travel through the heart in a regular pattern. Heart attacks, aging and high blood pressure may cause the heart to beat in an uneven pattern. Extra abnormal electrical pathways found in certain congenital heart defects can also cause arrhythmia.

Based on your symptoms, our cardiac electrophysiology team will match you with the best monitor to check your heart rhythm. We specialize in external and implanted monitors, and offer remote monitoring options if applicable.

Monitoring and specialized tests will help determine whether medicine or a surgical procedure is best for you.

Meet Mark Marieb, MD, FHRS

Cardiac Electrophysiology, Board Certified

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Griffin Health Cardiac Electrophysiology is led by Dr. Mark Marieb, a renowned expert in arrhythmia care and interventional cardiac electrophysiology in Connecticut for more than 25 years. Trained in Internal Medicine, Cardiology, and Electrophysiology at Yale University, Dr. Marieb was a founding partner of the Arrhythmia Center of Connecticut. He is an Associate Professor of Medicine and Clinical Director of Electrophysiology Yale University School of Medicine and Yale New Haven Hospital and is an Associate Professor in the Department of Medicine at the University of Connecticut School of Medicine. Dr. Marieb is Board Certified in Internal Medicine, Cardiology, and Clinical Cardiac Electrophysiology. He is a Fellow of the Heart Rhythm Society (FHRS), Fellow of the American College of Cardiology (FACC), Fellow of the American Heart Association (FAHA), and a Certified Cardiac Device Specialist (CCDS).


Additional 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, 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)

View My Board Certification Status

Meet Our Caregivers

Kristi Browning, APRN
Cardiac Electrophysiology

Natalie E. Coulis, PA
Cardiac Electrophysiology

Mark Marieb, MD
Cardiac Electrophysiology

Jennifer Nelson, APRN
Cardiac Electrophysiology

Karen Trabandt, BSN, RN
Cardiac Electrophysiology




  • 2 Ivy Brook Road, Suite 120, Shelton, CT 06484
  • 5 Durham Road, Building 3 Unit C-2, Guilford, CT 06437
  • 9 Washington Avenue, Suite 3A, Hamden, CT 06518

For more information or to make an appointment, call 203-916-5670.