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Spectrum Health study first to identify heart attack-causing plaque in living patients
Date:7/17/2013

GRAND RAPIDS, Mich., July 17, 2013 We may be closer to predicting who is at risk for a heart attack, according to a recently published Spectrum Health study.

Researchers with Spectrum Health's Frederik Meijer Heart & Vascular Institute used new imaging technology on patients being treated for heart attacks. The imaging technology allowed researchers to identify the characteristic makeup, or signature, of arterial plaque blocking an artery and causing a heart attack.

Knowing what type of plaque is present in narrowed arteries may help a physician determine a patient's risk for heart attacks and may lead to novel treatment options to avoid a serious cardiac event.

Previous research during autopsies has shown that most major heart attacks called ST-segment elevation myocardial infarctions (STEMIs) are caused by the rupture of lipid core plaque (LCP), a type of plaque rich in cholesterol. However, this is the first study to document the presence of LCP in living patients. The LCP was detected with the use of near-infrared spectroscopy (NIRS) performed with a special coronary catheter.

The study used this NIRS system to measure cholesterol in the plaques of 20 patients experiencing a STEMI. The measurements were made after blood flow was reestablished but before a stent was placed to keep the artery open.

The findings were published online this week in the Cardiovascular Interventions Journal of the American College of Cardiology.

"We have discovered a NIRS signature of the plaques which caused myocardial infarction, a leading cause of death and injury worldwide," said Ryan Madder, MD, a Spectrum Health interventional cardiologist and principal investigator of the study. "This signature is detectable at the time of cardiac catheterization using a novel intracoronary imaging device. It is our hope that this signature may be capable of predicting a myocardial infarction before it happens."


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Contact: Bruce Rossman
bruce.rossman@spectrumhealth.org
616-391-3706
Spectrum Health
Source:Eurekalert

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