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New Data Provide First Look at Ability to Detect Life-Threatening Heart Problems in Some High-Risk Patients
Date:5/5/2011

BALTIMORE, May 5, 2011 /PRNewswire/ -- New data presented today at the Society for Cardiovascular Angiography and Interventions (SCAI) Scientific Sessions are the first to look at the use of highly specialized signals within implantable cardioverter defibrillators (ICDs) to detect restricted blood flow to the heart in high-risk cardiovascular disease patients outside the hospital setting. Preliminary results from the ST-DETECT Trial using high-fidelity intracardiac electrogram (EGM) signals in ICDs show a low spontaneous coronary event rate (such as heart attack) among these patients.  

Using EGM signals to monitor and detect changes in the function of the heart has been studied in recent years, but these data are the first to examine the system specifically in patients with ICDs. ICDs are used in patients at risk for recurrent, sustained ventricular tachycardia or fibrillation, when the heart beats too quickly at a rate of more than 100 beats per minute. When an ICD detects ventricular tachycardia or fibrillation, it provides a painless shock to the heart to restore the normal rhythm and can potentially save the patient's life. The addition of the EGM signaling system has the potential to alert healthcare providers and the patients themselves if the patient is undergoing, or is about to undergo, a heart attack, allowing the patient optimal time to seek prompt treatment.

In the study, patients from 27 participating centers were monitored for 24 months following implantation of ICDs containing software for EGM. Patients qualified as high risk for a spontaneous coronary event (such as heart attack) by having one or more of the following risk factors:

  • A recent heart attack (six months or less)
  • A recent PCI (angioplasty) or stent
  • Multi-vessel disease, with one vessel more than 60 percent blocked, and/or
  • A recent positive stress test indicating heart disease

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SOURCE Society for Cardiovascular Angiography and Interventions (SCAI)
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