Key result
Body surface potential mapping and signal-averaged electrocardiographic mapping allowed noninvasive estimation of myocardial infarction and fractionated electrogram sites, with the departure integral map correlating with left ventricular wall motion abnormality.
Why the study?
Can body surface potential mapping and signal-averaged ECG mapping non-invasively estimate infarct location and endocardial fractionated electrogram sites in patients with old myocardial infarction?
Cross-Sectional (n=60)
Can body surface potential mapping and signal-averaged ECG mapping non-invasively estimate infarct location and endocardial fractionated electrogram sites in patients with old myocardial infarction?
Answers are grounded in this paper and cite their sources.
The combination of body surface potential mapping and LP-map allows for non-invasive estimation of infarct sites and endocardial fractionated electrogram locations, providing clinically useful information prior to invasive electrophysiological testing.
心筋梗塞60例に対し, 体表面電位図, 左室造影, 左室内電位mapping, 体表面加算平均心電図mappingを施行し, (1) 左室造影と体表面電位図との関係, (2) 梗塞部位と心内微小電位 (FE) 分布との関係, (3) FE分布と心室遅延電位 (LP) 分布との対比, (4) LP分布と体表面電位図との関係について検討した.梗塞部位, 範囲の診断には体表面電位図のdeparture mapが有用であった.FEは梗塞の左室壁運動異常部位に存在した.左室4分割 (前壁, 前壁中隔, 下壁, 後側壁) ごとのFE分布とLP分布の対比からLP陽性部位による左室内FE部位推定mapの作製が可能であった.LP-mapはQRSのdeparture mapやisointegral mapの一部に含まれたが, departure integral mapとの方がよく一致した.体表面電位図, LP-mapの組み合わせにより, 非侵襲的に梗塞部位やFE部位の推定が可能で, 電気生理学的検査施行前にこれらの検査を施行することは臨床的に有用と思われた.
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Sasaki et al. (1993) conducted a cross-sectional in Old myocardial infarction (n=60). Body surface potential mapping and signal-averaged electrocardiographic mapping vs. Left ventriculography and endocardial catheter mapping was evaluated on Correlation between departure integral area and left ventricular wall motion abnormality score (r=0.505, p=<0.01). Body surface potential mapping and signal-averaged electrocardiographic mapping allowed noninvasive estimation of myocardial infarction and fractionated electrogram sites, with the departure integral map correlating with left ventricular wall motion abnormality.
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