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Int J Cardiol. 2012 Apr 5;156(1):e1-3. doi: 10.1016/j.ijcard.2009.12.014. Epub 2009 Dec 31.

Acute myocardial infarction without significant coronary stenoses associated with endogenous subclinical hyperthyroidism.


Subclinical hyperthyroidism is an increasingly recognized entity that is defined as a normal serum free thyroxine and free triiodothyronine levels with a thyroid-stimulating hormone level suppressed below the normal range and usually undetectable. It has been reported that subclinical hyperthyroidism is not associated with coronary heart disease or mortality from cardiovascular causes but it is sufficient to induce arrhythmias including atrial fibrillation and atrial flutter. Nowadays, there is growing interest regarding endogenous sublinical hyperthyroidism and the cardiovascular system. We present a case of acute myocardial infarction without significant coronary stenoses in a 75-year-old Italian woman with endogenous subclinical hyperthyroidism. Also this case focuses attention on the importance of a correct evaluation of endogenous subclinical hyperthyroidism.

Copyright © 2009 Elsevier Ireland Ltd. All rights reserved.

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