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Case Reports in Cardiology
Volume 2012 (2012), Article ID 393580, 2 pages
http://dx.doi.org/10.1155/2012/393580
Case Report

Acute Cardiac Failure in a Pregnant Woman due to Thyrotoxic Crisis

Emergency and Critical Care Medicine, Tokushima University Hospital, 3-18-15 Kuramoto, Tokushima 770-8503, Japan

Received 25 May 2012; Accepted 24 June 2012

Academic Editors: S. Al-Jureidini, K.-R. Chiou, and C. Firschke

Copyright © 2012 Nao Okuda et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Introduction. Cardiac failure during pregnancy is usually related to preeclampsia/eclampsia, rarely to hyperthyroidism. While hyperthyroidism can easily lead to hypertensive cardiac failure and may harm the fetus, it is sometimes difficult to distinguish hyperthyroidism from normal pregnancy. Case Presentation. We encountered a case of 41-year-old pregnant woman with hypertensive cardiac failure. Because we initially diagnosed as pre-eclampsia/eclampsia, Caesarian section was performed. However, her symptoms still persisted after delivery. After thyroid function test results taken on the day of admission were obtained on the fourth day, we could diagnose that her cardiac failure was caused by thyrotoxic crisis. Conclusions. Hypertensive cardiac failure due to hyperthyroidism during pregnancy is rare and difficult to diagnose because of similar presentation of normal pregnancy. However, physicians should be aware of the risks posed by hyperthyroidism during pregnancy.