Why the study?
An association between thyrotoxic hypokalemic periodic paralysis and typical atrial flutter has seldomly been documented.
This case highlights a rare association between thyrotoxic hypokalemic periodic paralysis and typical atrial flutter, successfully managed with medical therapy.
Alerts clinicians to screen for thyrotoxicosis in periodic paralysis with flutter; leaves open prevalence and causality.
Periodic paralysis is a rare muscle disease that manifests as episodes of painless muscle weakness, and the hypokalemic form is commonly associated with hyperthyroidism. Most tachyarrhythmias related with thyrotoxicosis include sinus tachycardia and atrial fibrillation, but an association between thyrotoxic hypokalemic periodic paralysis and typical atrial flutter has seldomly been documented. Here, we present the case of a young male who was diagnosed with thyrotoxic periodic paralysis causing cavotricuspid isthmus-dependent atrial flutter, successfully treated with diltiazem, propranolol, methimazole, potassium iodine (SSK) and rivaroxaban.
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Sánchez-Nadales et al. (2022) studied this question.
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