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VT/VF is frequently seen in patients with higher change rate of QRS duration and higher pressure gradient at the tricuspid regurgitation. VT/VF(+), VT or VF patients; VT/VF(−), non VT or VF patients. VT, ventricular tachycardia; VF, ventricular fibrillation; TRPG, pressure gradient at tricuspid regurgitation.
