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Pediatric Cardiology division

The Division of Pediatric Cardiology at Weill Cornell Medicine (WCM) and the Phyllis and David Komansky Children's Hospital is an integral part of the Congenital Heart Center of NewYork-Presbyterian (NYP) Hospital.

Our cardiology team is dedicated to the pre-natal and post-natal diagnosis, management and treatment of a wide range of cardiac conditions, including:

  • Heart murmur
  • Arrhythmias
  • Chest Pain
  • Palpitations
  • Cardiomyopathy
  • Congenital Heart Disease
  • Kawasaki Disease
  • Marfan Syndrome
  • Syncope (fainting)
  • Other forms of heart disease that affect fetuses, neonates, children and/or young adults

Additionally, our extended team of pediatric cardiologists at Weill Cornell Medicine provide care for adult patients whose heart disease is either congenital in origin or acquired during childhood (including rheumatic fever, Kawasaki disease and others).

Easy Access and Extended Evening Hours
  • At Weill Cornell we understand how worrisome the thought of a potential heart problem in your child can be. As such, if requested by you, we are usually able to offer for your child to be seen within 36 hours of requesting an appointment.
  • We also understand that life is busy, and work as well as school schedules often make it difficult for you and your child to attend our clinic during regular hours.  As such, we offer evening clinics on most Tuesday and Thursdays in addition to regular daytime clinics.

Practice Information and Patient Forms

Services & Programs

Outpatient Services and Diagnostic Tests

Our outpatient division evaluates heart concerns that either you or your pediatrician believe need the attention of a pediatric cardiology specialist. Our diagnostic test services include Magnetic Resonance Imaging (MRI) and exercise (stress) testing.  


Cardiac Catheterization Program

We offer the full spectrum of interventional services for children and young adults of all ages with congenital heart disease.  Procedures are performed in a dedicated state-of-the-art cardiac catheterization laboratory.  In older patients, we perform the procedures as a team of pediatric and adult congenital interventional cardiologists. 

Echocardiography Lab

At our lab, we will evaluate the structure and function of your child’s heart without pain or radiation.  In most cases, your child's echocardiogram will be done as part of the visit to see the Pediatric Cardiologist. In some circumstances, patients may have an echocardiogram without an office visit with our specialists, if one of your doctors has certain questions about your child’s heart that we can answer with the echocardiogram alone. Either way, we are here to make your visit as fast and pleasant as possible.

Fetal Echocardiography Services

While a screening evaluation of the fetal heart is possible during regular obstetric scanning and is appropriate for women at low risk, women with risk factors for fetal congenital heart disease may benefit from a detailed fetal echocardiogram performed by a physician who is a specialist in evaluation of the fetal heart.  Our specialties include developmental differences of the fetal heart (congenital heart disease), fetal arrhythmias (rhythm disorders) and maternal medical conditions which may affect the fetal heart (maternal diabetes, autoimmune disease or exposure to certain medications).  

Pediatric Cardiothoracic Surgery Program

The Pediatric Cardiothoracic Surgery Program, which is part of the Congenital Heart Center of NewYork-Presbyterian Hospital, provides a wide spectrum of surgical services with high level care for infants, children and adults with congenital heart disease and is led by Dr. Emile Bacha, a world renowned expert in the surgical care of children and adults with congenital heart disease. 

Noninvasive Electrophysiology Services

An irregular heart rate is called an arrhythmia, and can occur at any age and during different times.  Often, your child does not feel the irregular rhythm and it is discovered unexpectedly during a routine physical examination. Your child’s doctor may suggest consultation with a pediatric cardiologist if an arrhythmia is detected.  Non-invasive tests that may be performed to help your doctor make a diagnosis include an electrocardiogram (EKG or ECG), Holter monitor, treadmill exercise test, and an event recorder.  

Our Team


Ralf Holzer

Ralf Holzer, M.D., M.S.

Chief, Pediatric Cardiology
Director, Pediatric Cardiac Catheterization
David Wallace-Starr Foundation Professor of Pediatric Cardiology
Professor of Clinical Pediatrics
Attending Pediatrician
Seena Abraham

Seena Abraham, M.B., B.S.

Clinical Assistant Professor of Pediatrics
Assistant Attending Pediatrician
Dr. Ken Bayle

Ken Bayle, D.O.

Assistant Professor of Clinical Pediatrics, Weill Cornell Medicine
Assistant Attending Pediatrician, NewYork-Presbyterian Hospital
Sheila Carrol

Sheila Carroll, M.D.

Director, Fetal Cardiology
Associate Professor of Clinical Pediatrics
Associate Attending Pediatrician
Headshot of Manoj Chhabra

Manoj Chhabra, M.D.

Assistant Professor of Clinical Pediatrics
NewYork-Presbyterian Brooklyn Methodist
Jeffrey Dayton

Jeffrey Dayton, M.D.

Associate Director, Pediatric Cardiology Fellowship (Cornell Campus)
Associate Professor of Clinical Pediatrics
Associate Attending Pediatrician
Patrick Flynn

Patrick Flynn, M.D.

Associate Professor of Clinical Pediatrics
Associate Attending Pediatrician
Jeffrey Kern

Jeffrey Kern, M.D.

Clinical Associate Professor of Pediatrics
Associate Attending Pediatrician
Dr. Soultana Kourtidou

Soultana Kourtidou, M.D.

Assistant Professor of Clinical Pediatrics
Assistant Professor of Pediatrics in Clinical Radiology
Assistant Attending Pediatrician
Dr. Nao Sasaki

Nao Sasaki, M.D.

Assistant Professor of Pediatrics, Weill Cornell Medicine
Assistant Professor of Pediatrics in Radiology, Weill Cornell Medicine
Assistant Attending Pediatrician, NewYork-Presbyterian Hospital
Dr. Maria Thanjan

Maria Thanjan, M.D.

Assistant Professor of Clinical Pediatrics
Assistant Attending Pediatrician

What to expect

Many cardiology tests can be performed on the same day as your visit. If a transthoracic echocardiogram (ultrasound of the heart) is needed, it will be performed during your visit in our office (either before or after seeing your physician).  

Test results will be reviewed with you, and your cardiologists is available to answer questions during your visit. Sometimes, further testing will be provided (such as 24 hour Holter monitoring), or a return visit may be needed for additional tests (such as exercise stress testing). A typical echocardiogram takes between 30-45 minutes to complete. Our dedicated pediatric echocardiography rooms are designed to maximize the comfort of our patients and families, allowing our office to perform almost all of our studies without the need for sedation or medications. While we do not routinely use sedation for echocardiograms, we have the capability in the rare case it is needed.   

Following the visit, our physicians remain available to you by phone for discussion regarding final testing results and/or ongoing symptoms.

What Sets us Apart

  • Our pediatric cardiologists are affiliated with the Congenital Heart Center at NYP - the highest-ranked center within the New York metropolitan area providing cardiac services for pediatric and adult patients with congenital heart disease.
  • WCM cardiologists specialize in transcatheter interventions and non-invasive imaging, dedicating themselves to continuous quality improvement and transparent outcome reporting.
Pediatric Cardiology
525 East 68th Street, F-677
New York, NY 10065
Lower Manhattan: 156 William Street, 7th Floor, New York, NY 10038
(212) 746-3561
(212) 746-8373

Pediatrics Weill Cornell Medicine Appointments & Referrals: (646) 962-KIDS (646) 962-5437 Chair's Office: Weill Cornell Medicine 525 E 68th St.
Box 225
New York, NY 10065 (646) 962-5437