From:  Myxoedema coma with complete atrioventricular block: a case report

 Focused comparison of selected reports of advanced AV block associated with thyroid dysfunction.

StudyPopulation/Thyroid disorderConduction abnormalityTemporary pacingPermanent pacemakerRecovery/Interpretation
Schoenmakers et al., 2008 [7]90-year-old woman; severe hypothyroidismComplete AV blockYesNoAV conduction restored; resolution documented at 6 weeks
Seol et al., 2012 [8]75-year-old man; severe hypothyroidismComplete AV blockYesNoAV conduction recovered by day 4; complete block absent at 4 weeks
Ozcan et al., 2012 [9]Retrospective cohort; 50 patients with thyroid dysfunction2nd/3rd-degree AV block or bradyarrhythmia ≤ 40/minNR44/50Thyroid dysfunction judged unrelated in 80%; recovery after > 21 days in some patients

AV: atrioventricular; NR: not reported.