Healthcare Industry News:  optical coherence tomography 

Devices Interventional Cardiology

 News Release - January 18, 2011

Texas Heart(R) Institute at St. Luke’s Episcopal Hospital Cardiologists First in Houston to Use Breakthrough Imaging to Better Diagnose and Treat Patients with Blocked Arteries

HOUSTON--(Healthcare Sales & Marketing Network)-- Texas Heart® Institute (THI) at St. Luke’s Episcopal Hospital (SLEH) cardiologists recently became the first in Houston to implement a new imaging tool that shows unprecedented detail of arteries, allowing interventional cardiologists to make more informed decisions when assessing and treating heart arterial blockages.

The cutting-edge technology, known as optical coherence tomography (OCT), enables physicians to be extremely precise when performing such heart procedures as placing a stent to unblock an artery. The high-resolution images can be especially important in assessing stent placement by clearly showing how the stent is holding the artery open and whether it is positioned correctly against the artery wall, optimizing treatment and follow-up strategies.

“The enhanced precision should result in better outcomes for patients,” said Emerson Perin, MD, director of cardiovascular research at THI. “OCT is a diagnostic tool that allows a physician to understand the composition of a heart blockage.”

Perin was among the first cardiologists to treat patients with OCT at SLEH, beginning December 16. He also researched the technology at THI prior to its being approved by the FDA in May 2010 for use in the United States.

“We have developed a good understanding of how OCT works and know it really well,” Perin said, noting that other THI interventional cardiologists are rapidly adopting the new technology.

OCT—already used in Europe and Japan—is employed in conjunction with heart catheterization procedures, including angioplasty, in which a cardiologist uses a tiny balloon on the tip of a catheter to unblock an artery in the heart. Most patients who undergo balloon angioplasty also receive a stent—a small mesh-like device placed inside the artery to keep the vessel open.

Before performing angioplasty, a cardiologist may use intravascular ultrasound, which utilizes sound waves to send back images showing where blockages are located in heart arteries and where to place the stent. Rather than using sound waves, OCT forms images by reflecting light inside blood vessels, allowing the cardiologist to see 10 times more detail than with intravascular ultrasound technology.

Perin added, “We are now able to clearly see the plaque, determine how much fat or clot there may be in an artery and take precise measurements before and after placing stents. The technology is also fast and easy to use.”

In its OCT research, THI focused on the side branches of coronary arteries and the effects of stenting. After a stent is placed, tissue from the lining of an artery typically grows around the stent. THI observed how much of a stent became covered with tissue and how much remained bare. This is important, Perin said, because an artery with an exposed metal stent is more prone to forming blood clots. The THI STEM Cell Center funded the research because circulating STEM cells comprise the tissue that grows around a stent.

THI assessed OCT against a scanning electron microscope, which also produces very high-resolution images, and determined that OCT is comparable to that technology.

The OCT technology at SLEH is the C7-XR System, developed by LightLab Imaging and recently acquired by St. Jude Medical. It utilizes near-infrared light to create images.

About St. Luke’s Episcopal Health System

St. Luke’s Episcopal Health System ( includes St. Luke’s Episcopal Hospital in the Texas Medical Center, founded in 1954 by the Episcopal Diocese of Texas; St. Luke’s The Woodlands Hospital; St. Luke’s Sugar Land Hospital; St. Luke’s Lakeside Hospital; St. Luke’s Patients Medical Center; St. Luke’s Hospital at The Vintage; and St. Luke’s Episcopal Health Charities, a charity devoted to assessing and enhancing community health, especially among the underserved. St. Luke’s Episcopal Hospital is home to the Texas Heart® Institute, which was founded in 1962 by Denton A. Cooley, MD, and is consistently ranked among the top 10 cardiology and heart surgery centers in the country by U.S. News & World Report. Affiliated with several nursing schools and three medical schools, St. Luke’s Episcopal Hospital was the first hospital in Texas named a Magnet hospital for nursing excellence, receiving the award three times.

About the Texas Heart® Institute

The Texas Heart Institute (, founded by world-renowned cardiovascular surgeon Dr. Denton A. Cooley in 1962, is a nonprofit organization dedicated to reducing the devastating toll of cardiovascular disease through innovative and progressive programs in research, education and improved patient care. Together with its clinical partner, St. Luke’s Episcopal Hospital, it has been ranked among the top 10 cardiovascular centers in the United States by U.S. News & World Report’s annual guide to “America’s Best Hospitals” for the past 20 years. The Texas Heart Institute is also affiliated with the University of Texas (UT) System, which promotes collaboration in cardiovascular research and education among UT and THI faculty at the Texas Heart Institute and other UT components.

Source: St. Luke’s Episcopal Health System

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