RT-132
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VF threshold: old and new
concepts
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D.H. Cox, R. Anilkumar, R.W.F.
Campbell.
Academic Cardiology Department, Freeman Hospital, Newcastle upon Tyne, UK
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Abstract
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VF threshold is an interesting and important concept.
Its use in man is not possible by current techniques, but surrogates such as QT dispersion
may give some information. VF however depends upon a trigger in addition to the substrate.
Furthermore a substrate/trigger interaction is almost certainly dynamic. There are thus
important restrictions to our ability to predict VF.
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Key Words
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Arrhytmhogenesis
ventricular fibrillation threshold, trigger/substrate interaction, defibrillation
threshold, inhomogeneity of repolarisation, QT dispersion, R
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