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Laser heart treatment shown to be safe and effective at lowering pain associated with heart disease

New research published in the September 30 issue of the New England Journal of Medicine shows that the use of a laser to drill holes in heart muscle to restore blood flow significantly reduces pain and discomfort associated with heart disease, according to one of the lead authors of the paper, Dr. Robert March. March is a cardiothoracic surgeon at the Rush Heart Institute at Rush-Presbyterian-St. Luke's Medical Center in Chicago.

During transmyocardial laser revascularization, (TMR) surgeons use a carbon dioxide laser to cut 15 to 30 one-millimeter-size holes through the wall of the heart to improve blood flow to the heart muscle. The outside surface of the heart seals immediately, but the channels remain open to provide oxygen-rich blood to previously deprived areas with a corresponding decrease in pain associated with angina. The firing of the laser beams is synchronized to the patient's heartbeat, allowing surgeons to create these channels without stopping the patient's heart.

In the New England Journal of Medicine article, the first peer-reviewed study of its kind, researchers from 12 medical centers studied 192 patients who were randomly selected for treatment using TMR (91) or continued medical management drugs such as nitrates, beta blockers and calcium channel blockers (101).

The researchers found that after 12 months, angina improved at least 2 classes, based on the Canadian Cardiovascular Society angina scale, in 72 percent of the TMR patients compared to 13 percent of the medically managed patients.

"In lay terms, this improvement means these patients went from being bedridden with severe chest pain to being able to move about with little or no pain," March said. The study also found that myocardial perfusion, or the heart's ability to pump oxygen and nutrient rich blood to other parts of the body, improved by 20 percent in TMR patients but worsened by 27 percent in those who received only medications. Additionally, the rat
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Contact: Chris Martin
Christopher_Martin@Rush.edu
312-942-7820
Rush University Medical Center
29-Sep-1999


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