Why do we need class I antiarrhytmics?

[TwoStep2021]

There are no situations where Class I ARs are tested without reference to speed of binding or side effects. When would a class I ARs actually be used above others?

Edit: one specific indication dofetilide in WPW


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[AlteredScale]

There are no situations where Class I ARs are tested without reference to speed of binding or side effects. When would a class I ARs actually be used above others?

Edit: one specific indication dofetilide in WPW


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Aren't you starting medical school in August?

 

[Instatewaiter]

There are no situations where Class I ARs are tested without reference to speed of binding or side effects. When would a class I ARs actually be used above others?

Edit: one specific indication dofetilide in WPW


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Dofetilide is a class III agent.

Ia are used rarely but disopyramidr is used commonly with hocm and a fib, procainamide tends to be drug of choice for wpw with afib and is used for VT, and quinidine is used for refractory VT.

Ib - lido and mexiletine are used for VT especially ischemic VT

Ic are predominantly used to convert af and aflutter- often as pill in the pocket.