New Bolton Center Kennett Square, PA
Emergencies & Appointments:
Ryan Hospital Philadelphia, PA
Cardiology Service at Penn Vet


The Cardiology Service at Penn Vet's Ryan Veterinary Hospital was established in 1958 and is considered the birthplace of specialty veterinary medicine. Today, the service continues this tradition by offering state-of-the-art diagnostic and treatment services aimed at improving the health and well-being of animal companions. The service offers comprehensive diagnostic services, including echocardiography, electrocardiography, radiography, angiography, and 24-hour ambulatory ECG (Holter) monitoring.

The service also offers the latest minimally-invasive surgical and interventional therapies, including correction of congenital heart defects and artificial pacemaker implantation. The Cardiology Service also offers access to numerous clinical trials involving new therapies and diagnostics that are not available anywhere else in the state.

Each year, the service sees over 1,500 patients. We will work in collaboration with your family veterinarian to provide compassionate and expert healthcare for your pet. 

The Cardiology Service sees appointments Monday-Friday. We will work with your schedule to make the appointment as convenient and efficient as possible.

Please Note: We cannot provide medical advice over the phone for pets that have not been seen by Cardiology.

Cardiology Appointments

Penn Vet Appointment Desk: 215-746-8387
Please request a cardiology appointment.

Ryan Veterinary Hospital
3800 Spruce Street
Philadelphia, PA 1910

Questions about your visit to Cardiology?
Call 215-898-3331 or email:

Cardiology services include cardiology consultations on in-hospital patients and appointments on an outpatient basis.


Penn Vet, CardiologyNon-invasive Procedures

  • Blood pressure measurement (indirect)
  • Echocardiography (incl. Doppler & Tissue Doppler)
  • Electrocardiography (10 lead ECG)
  • Event monitoring
  • Holter-monitoring (24 hours continuous ECG)
  • Pacemaker interrogation
  • Thoracic radiography (w/ Section of Radiology)

Invasive Procedures

  • Balloon valvuloplasty
  • Penn Vet, CardiologyCardiac catheterization/Angiocardiography
  • Device embolization of persistent ductus arteriosus (PDA)
  • Pacemaker implantation (temporary and permanent pacemakers)
  • Pericardiocentesis (+/- cytology)
  • Thoracocentesis (+/- cytology) and/or abdominocentesis
  • Endomyocardial biopsy


To set up an appointment with Cardiology, please call the Appointment Desk at 215-898-4680 (please ask specifically for a Cardiology Appointment when calling).

Appointment on an Out-patient Basis

Time required for a cardiology appointment is dependent on the amount of diagnostic work-up warranted and is therefore variable with each individual case. Typically between one and three hours is necessary for most cases (for some patients specific arrangements can be made with the individual cardiologist for admission as day-cases, with drop-off in the morning and discharge later in the day).

Clinical Trials

Cardiology is dedicated to the advancement of care and diagnostics. As a result, Cardiology is often involved in ongoing clinical trials of new therapies and diagnostic procedures. These clinical trials recruit throughout the year. To get information about what clinical trials are currently being offered, contact the Cardiology office for more information at 215-898-8889.

Invasive Procedures

Patients are typically admitted to the hospital early on the day of the procedure or the prior evening and discharged the following day (if no complications). An exception is pericardiocentesis or thoracocentesis, which are usually performed on an out-patient basis.

Blood Work

This is performed in conjunction with the clinical lab.

Supportive Tests

If blood work and/or radiographs have been done at a local veterinary hospital, please bring these records to the appointment at Penn Vet.

Note: For emergencies, please call the Emergency Service at the Ryan Veterinary Hospital directly at 215-898-8911.

Dr. Anna Gelzer, Cardiology, Penn Vet


  • Professor, Cardiology
  • Section Chief, Cardiology
Dr. Marc Kraus, Cardiology, Penn Vet
  • Professor, Clinical Cardiology
  • Outpatient Medical Director
Mark Oyama, Penn Vet, cardiology
James Buchanan, Penn Vet, cardiology
Cardiology Residents & Interns
  • Erin Achilles, VMD

  • Specialty Intern, Cardiology 

No photo
  • Wiehow Hsue, DVM
  • Specialty Intern, Cardiology
Dr. Terry Huh, Penn Vet 

Terry Huh, DVM

Specialty Intern, Cardiology

Dr. Eva Larouche-Lebel, Penn Vet
  • Eva Larouche-Lebel, DVM
  • Resident, Cardiology 
Dr. Kelly Loughran, Penn Vet
  • Kerry Loughran, DVM
  • Resident, Cardiology

Nursing Staff
  • Lila K. Sierra, CVT, VTS (ECC)

Referring veterinarian?

If you are referring a patient to Ryan Hospital, please...