| Literature DB >> 16441726 |
Yukiteru Nakayama1, Makoto Ohno, Shigeto Yonemura, Hiroki Uozumi, Naoshi Kobayakawa, Kazuyuki Fukushima, Hiroaki Takeuchi, Teruhiko Aoyagi.
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.Entities:
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Year: 2006 PMID： 16441726 DOI： 10.1111/j.1540-8159.2006.00284.x
Source DB: PubMed Journal: Pacing Clin Electrophysiol ISSN： 0147-8389 Impact factor: 1.976