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Originally published1 Sep 1977https://doi.org/10.1161/01.CIR.56.3.409Circulation. 1977;56:409–416 ...
Participants were excluded if they presented with (1) no sinus rhythm or paced rhythm on the study ECG or Wolff-Parkinson-White ECG pattern; (2) missing or non-interpretable ECG; and (3) missing ...
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