期刊文献+

植入复律除颤器以降低室颤诱发时的易损性上限的确定

Upper limit of vulnerability determination during implantable cardioverter-defibrilla-tor placement to minimize ventricular fibrillation inductions
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摘要 The defibrillation threshold(DFT) and upper limit of vulnerability(ULV) were d etermined using step-down protocols in 50 patients who underwent implantable ca rdioverter-defibrillator placement or testing. The sensitivity and specificity of each ULV energy level was assessed for detecting an increased DFT, correlatio n of the DFT and ULV, and optimal shock timing for ULV determination. A ULV < 10 or 11 J(failure to induce ventricular fibrillation with 10-to 11-J shocks) wa s 100%predictive of an acceptable DFT and may be sufficient to exclude unaccept able DFTs in 60%of implantable cardioverter-defi-brillator recipients. All 4 shocks used to scan the peak of the T wave during ULV testing were necessary for accurate ULV determination. The defibrillation threshold(DFT) and upper limit of vulnerability(ULV) were d etermined using step-down protocols in 50 patients who underwent implantable ca rdioverter-defibrillator placement or testing. The sensitivity and specificity of each ULV energy level was assessed for detecting an increased DFT, correlatio n of the DFT and ULV, and optimal shock timing for ULV determination. A ULV < 10 or 11 J(failure to induce ventricular fibrillation with 10-to 11-J shocks) wa s 100%predictive of an acceptable DFT and may be sufficient to exclude unaccept able DFTs in 60%of implantable cardioverter-defi-brillator recipients. All 4 shocks used to scan the peak of the T wave during ULV testing were necessary for accurate ULV determination.
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