Katy Lonergan, M.D.

  • Internal Medicine - Cardiology
  • General Cardiology
  • Cardiac Imaging

Accepting Virtual Visits or 214-645-8000

or 214-645-8000

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Cardiology (Park Cities)

at UT Southwestern Medical Center at Park Cities

8611 Hillcrest Road, 3rd Floor, Suite 300, Dallas, Texas 75225

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Katy Lonergan, M.D., is a board-certified cardiologist and Associate Professor of Internal Medicine at UT Southwestern Medical Center.

She received a bachelor’s degree in biomedical engineering from the University of Southern California and earned her medical degree at Johns Hopkins University in Baltimore. She trained in internal medicine and cardiovascular disease at the University of California, San Francisco.

She joined the UT Southwestern faculty in 2013 and is part of the cardiology team at the Clinical Center in Park Cities, where she treats patients with general cardiac issues. Board certified in echocardiography and nuclear cardiology, she also uses noninvasive cardiac imaging to assess a patient’s cardiac risk. She has a special interest in women’s cardiac health, particularly pregnant women.

Prior to joining UT Southwester, Dr. Lonergan worked in clinical cardiology at Mills-Peninsula Hospital in Burlingame, Calif., and at the University of California, San Francisco.

Dr. Lonergan is a Fellow of the American College of Cardiology and has published book chapters, abstracts, and research articles in the Journal of Magnetic Resonance Imaging, theJournal of Stroke and Cerebrovascular Disease, and other medical periodicals.

Personal Note

In her downtime, Dr. Lonergan enjoys yoga, running, traveling, and spending time with her husband, who also is a physician, and their two children.

Meet Dr. Lonergan

Katy Lonergan, M.D., is unwavering in her efforts to prevent heart disease, especially in women.

"It is the number one cause of death in women in the United States, so prevention, recognition, and treatment are crucial," she says.

A board-certified cardiologist and Assistant Professor of Internal Medicine at UT Southwestern Medical Center, Dr. Lonergan is on staff at the Clinical Center in the Park Cities, where she treats patients with general cardiac problems, coronary artery disease, congestive heart failure, hypertension, and heart valve disease. She uses ultrasound, stress testing, and other noninvasive imaging tools to assess a patient’s risk of cardiac complications. She also has a special interest in women’s cardiac health.

"People in their 20s, 30s, and 40s should be thinking about lifestyle choices that will lower their risk of heart disease 10 or 20 years down the road.”

Dr. Lonergan enjoys building relationships with patients, educating them about cardiac care, and developing strategies that will help them stay the course toward optimal health.

"You don’t prevent heart disease in six or 12 months," she says. "You do that over decades, ideally before it has a chance to develop."

Being screened for the five big risk factors – high blood pressure, diabetes, high cholesterol, smoking, and a family history of heart disease – should be a top priority, Dr. Lonergan says.  And the earlier the better, she says, even before symptoms begin.

Obesity, poor diet, lack of physical activity, and obstructive sleep apnea can also be precursors to heart disease, she says. But if patients are willing to make slight lifestyle adjustments, they will reduce their chance of developing heart disease over their lifetime.

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Education & Training
  • Fellowship - University of California San Francisco School of Medicine (2004-2009), Cardiology
  • Residency - University of California San Francisco School of Medicine (2002-2004), Internal Medicine
  • Medical School - Johns Hopkins University School of Medicine (1977-2002)
Professional Associations & Affiliations
  • American College of Cardiology (2010), Member
Honors & Awards
  • Sarnoff Cardiovascular Research Foundation Fellowship 2000, Research training for medical students
Books & Publications
  • Echocardiography
  • Cardiac imaging

Clinical Focus

  • General Cardiology
  • Cardiac Imaging
  • Women's Heart Disease
  • Diabetes & Heart Disease

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Q&A by Dr. Lonergan