Comparison of high-frequency QRS components and ST-segment elevation to detect and quantify acute myocardial ischemia.
- Ringborn, Michael
- Pettersson, Jonas
- Persson, Eva
- Warren, Stafford G
- Platonov, Pyotr
- Pahlm, Olle
- Wagner, Galen S
DOIAbstract
OBJECTIVE: This study tests the ability of high-frequency components of the depolarization phase (HF-QRS) vs conventional ST-elevation criteria to detect and quantify myocardial ischemia. METHODS: Twenty-one patients admitted for elective percutaneous coronary intervention were included. Quantification of the ischemia was made by myocardial scintigraphy. High-resolution electrocardiogram before and during percutaneous coronary intervention was recorded and signal averaged. The HF-QRS were determined within the frequency band 150 to 250 Hz. ST-segment deviation was measured in the standard frequency range (<100 Hz). RESULTS: HF-QRS criteria were met by 76% of the patients, whereas 38% met the ST-elevation criteria (P = .008). Both HF-QRS red...
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