Amiodarone toxicity can present with a variety of severe but reversible ECG changes including marked QT and PR prolongation and high-degree AV block.
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Amiodarone toxicity may cause reversible high-degree AV block; this case report leaves open incidence and risk factors.
We present here the case of a middle aged male with baseline bifascicular block, who continued on more than the prescribed doses of amiodarone and presented with ECG changes which are described in association with amiodarone toxicity. The interesting part is the marked prolongation of QT and PR interval and 2:1 AV block as well as wenckebach on the initial ECG which largely normalized over 72 hour on stopping the drug.
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Vikas Singh Pramod Kumar (2015) studied this question.
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