How Electrophysiology Helps Cardiac Arrhythmias

We understand how bothersome cardiac arrhythmias (problems related to the heart’s electrical system) can be. Yet, more than merely a nuisance, cardiac arrhythmias can put you at greater risk for stroke and sudden death. That’s why it’s important to find an experienced, compassionate electrophysiologist, a doctor who treats electrical disorders of the heart, to offer the best available treatment options.

At the Heart & Vascular Institute (HVI), our board-certified electrophysiologists are regional leaders in the diagnosis and treatment of cardiac arrhythmias. They are committed to balancing technical expertise with an unwavering commitment to person-centered care.

Our electrophysiologists collaborate with the referring cardiologist and a multidisciplinary team of heart specialists. Together, they determine the cause of an arrhythmia and develop a targeted treatment plan.

The electrophysiology team performs all of the procedures in our new electrophysiology lab at Stamford Hospital with cutting-edge equipment.

What Sets Us Apart

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We’re the regional leaders in the diagnosis and treatment of atrial fibrillation, offering a full spectrum of treatment options.
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Stamford Hospital became the first in Connecticut to implement the Watchman device to treat atrial fibrillation.

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We were the first hospital in the region that implanted Abbott’s AVEIR Leadless Pacemaker and continue to be the only site in the region that offers cryoablation.

Take A Look Inside Our Lab

What Is Electrophysiology?

Electrophysiology is the study of electrical disorders of the heart, such as atrial fibrillation (AFib). We examine the heart’s electrical signals to determine the cause of an abnormal heart rhythm.

Your physician or cardiologist may refer you to see an electrophysiologist at the Heart & Vascular Institute (HVI). Here, our board-certified electrophysiologists bring you the latest, most innovative treatment options to develop a targeted treatment plan that’s designed to alleviate your symptoms, decrease your risk of stroke and sudden cardiac death, and improve your quality of life.

Patient-Focused Treatment Using Advanced Technology


Our electrophysiology team has extensive experience in heart rhythm disorder devices including pacemakers, the Watchman device, and defibrillators.


Our collaborative approach is dedicated to patient care and we work with you to develop programs that are doable and effective at reducing your risk of stroke.


We were the first hospital in Connecticut to perform cryoballoon ablation, an innovative treatment for atrial fibrillation. We remain leaders in ablation techniques such as cryoablation and radiofrequency ablation.

Testing & Treatment

Stamford Health’s electrophysiologists work together with your cardiologist, primary care provider, and any other specialists to effectively diagnose and treat heart rhythm disorders. We’re committed to bringing patients the latest, innovative treatment approaches to complex arrhythmias performed in a compassionate, supportive environment.

During treatment, a doctor may recommend any of the following tests:

  • To diagnose a heart disorder, an electrophysiologist may order non-invasive tests such as an electrocardiogram (EKG) to measure the rate and rhythm of your heartbeat or a Holter and event monitor to diagnose arrhythmias that come and go.
  • Our electrophysiologists may suggest implanted devices including an event recorder (loop recorder), which is implanted under the skin in the chest, or the Watchman, a permanent implant that provides an alternative to blood thinners.
  • To treat arrhythmia, you may undergo an ablation treatment such as catheter ablation. This non-surgical technique destroys small areas of heart tissue that are responsible for an abnormal heart rhythm.
  • Other highly successful treatments include implantation of cardioverter defibrillator (ICD), pacemaker, and subcutaneous ICD.

CardiacTesting Diagnostics
We offer an array of cardiac diagnostic testing procedures to give you accurate results and to help us come up with a treatment plan together.

Meet Our Doctors

Sandhya  Dhruvakumar
Cardiovascular Disease, Clinical Cardiac Electrophysiology

(203) 276-2321

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Hamed  Emami
Cardiovascular Disease, Electrophysiology

(203) 276-2321

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Joshua M Lader
Cardiovascular Disease, Clinical Cardiac Electrophysiology

(203) 276-2321

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