Equine Cardiology

New Bolton Center, cardiologyNew Bolton Center's Large Animal Cardiology Service, part of the Section of Sports Medicine and Imaging, is staffed by some of the leaders in the field of equine/large animal cardiology.

Although the occurrence of heart attacks and heart failure is rare in horses, there are certain anomalies and diseases of the heart that are seen in horses, including heart murmurs, congenital heart defects, atrial fibrillation, degenerative valvular deformities, myocardial and vascular disease.

New Bolton Center's board-certified specialists are members of a multidisciplinary group consisting of board certified internists, surgeons and sports medicine and rehabilitation specialists. 

New Bolton Center's Cardiology Service offers world-class clinicians and state-of-the-art equipment,  including:

    • Echocardiography
    • Electrocardiography
    • Stress echocardiography
    • Radiotelemetry
    • Electrocardiography
    • Holter monitoring
    • Phonocardiography
    • Cardiac troponin I analyzer
    • Intracardiac pressure monitoring
    • Radiography
    • Biphasic electrical defibrillator


Outstanding faculty and staff specializing in cardiac evaluation, diagnosis, and therapy are responsible for performing the assessment and managing the treatment of the large animal cardiac patient.

Clinical Faculty
  Name Title Phone Number Email Address
 Virginia Reef, Penn Vet, cardiology Virginia Reef, DVM, DACVIM Section Chief, Sports Medicine 610-925-6190 vreef@vet.upenn.edu
Dr. Joanne Slack, Sports Medicine, NBC  JoAnn Slack, DVM, MS, Diplomate ACVIM Assistant Professor of Ultrasonography and Cardiology 610-925-6190 slackj@vet.upenn.edu
 Dr. Federica ter WoortFederica ter Woort, DMV, DACVIM, LAIM
 Gloria Ballinger, LVT, Sports Medicine, New Bolton CenterGloria Ballinger (LVT)Sports Medicine & Imaging Technician

A complete cardiac evaluation can be performed on all large animal patients along with state-of-the-art treatments as indicated.

To Make an Appointment

For all routine and emergency appointments call 610-444-5800, 24 hours a day, 7 days a week.
Appointments may be made by the owner, trainer or referring veterinarian.