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Figure 5 Evidence-based flow chart for primary prevention of sudden cardiac arrest (SCA) including T-wave alternans (TWA). Scenarios where TWA has been validated are referenced, and labels I to III are keys to these sections of the text. *High-risk subgroup of (12) with left ventricular ejection fraction (LVEF) slightly higher than 35%, at 39 ± 18%. See Tables 1 and 2.
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