What is the role of lidocaine (a local anesthetic and anti-arrhythmic medication) in treating supraventricular tachycardia (SVT) that is unresponsive to initial treatments?

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What is the role of lidocaine (a local anesthetic and anti-arrhythmic medication) in treating supraventricular tachycardia (SVT) that is unresponsive to initial treatments?

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