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Kaplan‐Meier event‐free curves for ventricular tachyarrhythmias according to T‐wave alternans (TWA) (Panel A) and left ventricular ejection fraction (LVEF) (Panel B). 55 TWA‐positive patients had more frequent event recurrences than TWA‐negative patients (P = 0.02), whereas LVEF ≤ 40% did not distinguish between patients with and without events (P = 0.68).
