Reversible Atrioventricular Block in Myxedema

Singh, Jang Bahadur; Starobin, Oscar E.; Guerrant, Richard L.; Manders, Ernest K.

doi:10.1378/chest.63.4.582

Cited by 27 publications

(11 citation statements)

References 17 publications

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“…Among the various causes of AV block, hypothyroidism is one of the rare problems which can recover pharmacologically. There are some case reports such as our case [7-10]. However, failure to respond to thyroid hormone treatment is associated with irreversible extensive fibrotic change in myocardium [2].…”

Section: Discussionmentioning

confidence: 95%

Complete Atrioventricular Block Presenting With Syncope Caused by Severe Hypothyroidism

et al. 2012

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A 75-year-old man was admitted to our hospital with syncope. Electrocardiogram showed complete atrioventricular block and bradycardia with the minimum heart rate of 22 beats/ min. There was a possible indication for temporary cardiac pacemaker implantation. Laboratory data on admission revealed high TSH level with low free T4 level. To rule out functional atrioventricular block, we treated several days with thyroxine. A follow-up electrocardiogram showed improved heart rate without any atrioventricular block. We found that severe hypothyroidism caused a complete atrioventricular block with syncope, and thyroxine replacement completely improved these conditions.

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Section: Discussionmentioning

confidence: 95%

Complete Atrioventricular Block Presenting With Syncope Caused by Severe Hypothyroidism

et al. 2012

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“…Hypothyroidism is one of the rare bradicardiogenic etiologies, which can show complete recovery under pharmacological management. Few cases have been reported in the literature demonstrating favorable course with complete resolution of the atrioventricular conduction abnormality [7][8][9][10]. However extensive myocardial fibrotic changes can lead to irreversible conduction delay.…”

Section: Discussionmentioning

confidence: 99%

Resolution of Complete Atrioventricular Block in a Patient with Severe Hypothyroidism

Said¹,

Cj²,

Gt³

2013

JOURNAL OF CASE REPORTS AND STUDIES

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“…[4][5][6] Decades ago, several case reports presented similar cases describing complete AV block secondary to severe hypothyroidism. [4][5][6] Recovery to sinus rhythm after treatment with levothyroxine was reported. We started treatment with low-dose levothyroxine and used a temporary pacemaker instead of implantation of a permanent pacemaker, expecting the thyroid levels to increase within one or two months.…”

Section: Discussionmentioning

confidence: 99%