A case of transient 2:1 atrioventricular block, resolved by thyroxine supplementation for subclinical hypothyroidism

Yukiteru Nakayama; Makoto Ohno; Shigeto Yonemura; Hiroki Uozumi; Naoshi Kobayakawa; Kazuyuki Fukushima; Hiroaki Takeuchi; Teruhiko Aoyagi

doi:10.1111/j.1540-8159.2006.00284.x

A case of transient 2:1 atrioventricular block, resolved by thyroxine supplementation for subclinical hypothyroidism

Yukiteru Nakayama, Makoto Ohno, Shigeto Yonemura, Hiroki Uozumi, Naoshi Kobayakawa, Kazuyuki Fukushima, Hiroaki Takeuchi, Teruhiko Aoyagi

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

A 42-year-old man was admitted to our hospital with palpitation attacks. Holter ECG showed 2:1 atrioventricular block and bradycardia with the minimum heart rate of 44 beats/min. There was a possible indication of electrophysiological study and cardiac pacemaker implantation. Laboratory data on admission revealed elevated thyrotropin level, with normal thyroxine level. To rule out functional atrioventricular block, we tried 2 weeks of the thyroxine supplementation, and Holter ECG showed improved heart rate without any atrioventricular block or long pause. We experienced that subclinical hypothyroidism caused severe bradycardia and 2:1 atrioventricular block, and that thyroxine supplementation completely improved these conditions.

Original language	English
Pages (from-to)	106-108
Number of pages	3
Journal	PACE - Pacing and Clinical Electrophysiology
Volume	29
Issue number	1
DOIs	https://doi.org/10.1111/j.1540-8159.2006.00284.x
Publication status	Published - 2006 Jan 1

Keywords

Atrioventricular block
Bradycardia
Hashimoto disease
Subclinical hypothyroidism

ASJC Scopus subject areas

Cardiology and Cardiovascular Medicine

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A case of transient 2:1 atrioventricular block, resolved by thyroxine supplementation for subclinical hypothyroidism. / Nakayama, Yukiteru; Ohno, Makoto; Yonemura, Shigeto; Uozumi, Hiroki; Kobayakawa, Naoshi; Fukushima, Kazuyuki; Takeuchi, Hiroaki; Aoyagi, Teruhiko.

In: PACE - Pacing and Clinical Electrophysiology, Vol. 29, No. 1, 01.01.2006, p. 106-108.

Research output: Contribution to journal › Article › peer-review

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AU - Kobayakawa, Naoshi

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AU - Takeuchi, Hiroaki

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