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8 Cards in this Set
- Front
- Back
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What do Class I anti-arrhythmics block?
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Na channels
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What do Class IA anti-arrhythmics block?
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prolong repolarization (QT interval)
- moderate Na block |
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What do Class IB anti-arrhythmics block?
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shorten repolarization
- weak Na block |
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What do Class IC anti-arrhythmics block?
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little effect on repolarization
- strong Na block |
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What do Class II anti-arrhythmics block?
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Beta-blocker
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What do Class III anti-arrhythmics block?
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K channels
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What do Class IV anti-arrhythmics block?
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Ca channels
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what's the risk of class III antiarrhtymic drugs that lengthen repolarization?
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increased risk for re-entrant arrhthmias
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