San Antonio Endovascular & Heart Institute, in conjunction with R. Stefan Kiesz MDPA, specializes in diagnosing, treating, managing and researching diseases, and disorders of the heart and vascular system.

About Us

New Location

We've opened a new office in Stone Oak. Please come and visit our state of the art facility. Our office is located on the first floor in the beautiful, recently constructed building "La Arcata" on Tuscany Stone, 1 minute drive from 281 and 1604 junction...


We’ll Be Testing Your Heart

The test is called myocardial perfusion imaging (MPI). Sound complicated? It really isn't. It can help physicians see if there's a problem with your heart without doing any surgery.

Nuclear Medicine Lab


The SAEHI echo/peripheral vascular laboratory is specially designed utilizing the most advanced non invasive technology performed by trained personnel who are highly skilled in the identification and diagnosis of problems of the cardiovascular system.

Cardiovascular Lab

Make an Appointment

At San Antonio Endovascular & Heart Institute, we genuinely care about our patients. Our staff is known for compassion and personal dedication. We make it convenient to get world-class care and offer same-day appointments. Contact us directly by phone or email:


...or fill in the form on our Appointments page:


Get World-Class Care

The Personalized Care, Attention, & Dedication You Deserve. Today's Most Advanced Interventional Procedures:


Meet the Staff: Dr. Kiesz

Today, after 25 years of dedication to and innovation in interventional medicine, I am able to provide a level of care that’s well beyond today’s standard.

But what drives me to be among the world’s best interventionalists is people. I do this because there are lives that can be saved, and they deserve every chance.


From the Doctor:

It's thrilling to be involved in international studies, research and the development of new techniques in coronary interventions. The thrill is helping change - and save - people's lives."
R. Stefan Kiesz, MD

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