Current Environment:

If your child has been diagnosed with an arrhythmia or is suspected of having a heart rhythm problem, it’s important that she be examined by a pediatric electrophysiologist. Our Electrophysiology Service, part of the #1-ranked children's hospital, offers a wide range of diagnostic and treatment options for children — and adults — who suffer from an abnormal heart rhythm. Please contact us today for a consultation or second opinion.


Ed Walsh, MD, Boston Children's Cardiac Electrophysiology Service

Our expertise

Our service specializes in complex cases that require a high level of expertise. Our doctors and nurses routinely handle heart rhythm problems in even the tiniest and most vulnerable babies. With six full-time cardiologists, nurse specialists, and trained fellows, we are one of the largest electrophysiology programs in the country.

The skills and equipment for treating irregular heart rhythms are highly specialized, but must be tightly integrated with the patient's overall health and treatment for other conditions. This is an area where Boston Children's excels. Electrophysiologists partner closely with other cardiologists and other specialists to achieve the best outcomes for these complex cases.

Because Boston Children's routinely handles heart rhythm disturbances in infants and very young children, the program is attuned to their needs. Their smaller size and still-developing physiology require smaller equipment than that used for adults, as well as special care in anesthesia and exceptional diagnostic and surgical skills.

History of innovation

In 1938, Boston Children’s cardiac surgeon Robert Gross, MD, performed the world’s first successful surgery to correct a child’s heart defect. Since that time, we have gained recognition around the globe for our leadership in pediatric cardiology and continue to make critical advances in the field.

Mapping the heart

Edward Walsh, MD, and John Triedman, MD, of Boston Children's Electrophysiology Service, have helped develop a new technology that electrically maps the heart, providing an extremely detailed way to see where complex arrhythmias originate. The resulting catheter-based procedure allows Boston Children's cardiologists to treat arrhythmias with extreme precision. Our specialists use the technology to repair complex arrhythmias in more congenital heart patients than any other hospital in the world.

Our philosophy of care

We are an integrated team of physicians, nurses, and technologists specializing in pediatric heart rhythm disorders. We work within the larger team of cardiac professionals at the Boston Children’s Hospital Benderson Family Heart Center. We have a strong emphasis on the doctor/patient relationship and the continuity of care. When it comes to pediatric and congenital electrophysiology, no problem is too large or complex for us to manage, and no problem is too small for us to pursue with our signature drive for excellence.

We continuously search for ways to improve our performance in all aspects of our work — procedural outcomes; attentive communication with patients, families, and referring physicians; and disciplined coordination of inpatient and outpatient care.

Clinical interests

Our team has a broad range of clinical interests, including:

  • low-dose biplane fluoroscopy
  • three-dimensional electroanatomical mapping
  • cryocatheter and cryoballoon ablation
  • intracardiac echocardiography
  • laser lead extraction
  • radio frequency-assisted transeptal access
  • ultrasound-guided resynchronization
  • genetics of arrhythmia and cardiomyopathy
  • arrhythmia in adult congenital heart disease
  • specialized arrhythmia surgery

Volume and scope

Since 2005, our group has performed nearly 7,000 electrophysiology (EP) procedures. This includes:

  • more than 2,850 catheter ablations
  • more than 2,450 pacemaker and ICD implants and revisions
  • more than 1,850 diagnostic EP procedures and cardioversions