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Kaplan-Meier curve of freedom from VT/VF. (A) Comparison between patients with QRS change rate more than 2 ms/year or without; (B) comparison between patients with TRPG more than 40 mmHg or without. VT, ventricular tachycardia; VF, ventricular fibrillation; TRPG, pressure gradient at tricuspid regurgitation.
