Key result
Electrical cardioversion shows similar AF recurrence rates in hyperthyroid and euthyroid patients.
Why the study?
After effective cardioversion, the long-term outcome of hyperthyroidism-induced persistent AF is unknown.
Does the recurrence rate of atrial fibrillation after electrical cardioversion differ between hyperthyroid and euthyroid patients?
Does the recurrence rate of atrial fibrillation after electrical cardioversion differ between hyperthyroid and euthyroid patients?
Early electrical cardioversion before achieving euthyroid status may be a viable strategy for hyperthyroidism-induced AF, as recurrence rates do not significantly differ from those in euthyroid patients.
Answers are grounded in this paper and cite their sources.
May support early cardioversion in hyperthyroid AF; leaves open need for prospective confirmation.
Hyperthyroidism is a prevalent cause of atrial fibrillation (AF). High cardiac output with low systemic vascular resistance, driven by hyperthyroidism, is associated with a rapid heartbeat, enhanced left ventricular systolic and diastolic function, and a higher incidence of supraventricular tachyarrhythmias. After returning to euthyroid status, hyperthyroidism-induced AF generally spontaneously reverts to sinus rhythm (SR), and a significant number of patients remain in chronic AF and require electrical cardioversion (ECV). After effective cardioversion, the long-term outcome of hyperthyroidism-induced persistent AF is unknown. Early ECV before the antithyroid medication should be explored for hyperthyroidism-induced AF to reduce the risk of thromboembolic consequences. The recurrence rate of AF between Hyperthyroid and Euthyroid Patients after ECV did not significantly differ. This review article compares the recurrence rate of AF as an outcome of ECV in Hyperthyroid induced atrial fibrillation.
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Shah et al. (2023) conducted a review in Hyperthyroidism-induced atrial fibrillation. Electrical cardioversion vs. Euthyroid patients was evaluated on Atrial fibrillation recurrence rate (p=0.93). Electrical cardioversion resulted in similar atrial fibrillation recurrence rates between hyperthyroid (43.8%) and euthyroid (44.7%) patients.
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