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QT prolongation can lead to life-threatening events such as ventricular arrhythmias, torsades de pointes, and even cardiac arrest.
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There are other causes for QT prolongation. An example is electrolyte disturbances.
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However, medications are a major cause for QT prolongation.
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Here are some main ones to remember. These should be held if someone has QT prolongation
Med classes that often cause QT prolongation:
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Anti-fungal
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Antihistamine
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Antipsychotic
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Macrolide
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Anti-arrhythmic agents
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Fluoroquinolone
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