P-wave signal averaging. High tech or an expensive alternative to the standard ECG?
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D001281:Atrial Fibrillation / Q000175:diagnosis / Q000209:etiology; D001026:Coronary Artery Bypass / Q000009:adverse effects; D004562:Electrocardiography / Q000191:economics / Q000379:methods* / Q000706:statistics & numerical data; D006801:Humans; D012815:Signal Processing, Computer-Assisted; D013675:Technology, High-Cost