Magazine article from our research archive:
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R-wave amplitude changes measured by electrocardiography during early transmural ischemia
- Article from:
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Journal of Electrocardiology
- Article date:
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September 1, 2008
- Author:
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Copyright informationCopyright Elsevier Science Ltd. Sep/Oct 2008. Provided by ProQuest LLC. (Hide copyright information)
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Abstract
Background: Changes in the amplitude of the R wave (RWA) on the electrocardiogram (ECG) have been described during acute myocardial ischemia and infarction. However, this has not been well studied in a controlled setting. We hypothesized that significant increase in RWA occurs during early transmural myocardial ischemia.
Methods: We prospectively evaluated changes in RWA in 50 patients during brief episodes of transmural ischemia induced by first balloon occlusion (mean, 38 seconds at 6-10 atmospheric pressures) during elective percutaneous coronary intervention. We recorded 12-lead ECGs at 20-second intervals before and during balloon inflation in 16 right coronary arteries, 14 ...
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