22 August 2018

Published in Hindawi – Case Reports in Cardiology
Journal Issue: Volume 2018, Article ID 4827907, 5 pages
Case Report
Authors: Serena Sert Kim Khoo,1 Chong Mow Chu,2 and Yin Khet Fung 1
Institutions: 1Endocrinology Unit, Queen Elizabeth Hospital II, Kota Kinabalu, Sabah, Malaysia
2Cardiology Department, Queen Elizabeth Hospital II, Kota Kinabalu, Sabah, Malaysia
Correspondence should be addressed to Serena Sert Kim Khoo; sk_liv@rocketmail.com
Severe thyrotoxicosis can present with a myriad of cardiovascular complications. It may be mild features such as palpitations, tachycardia, and exertional dyspnea or may progress to life-threatening consequences such as atrial fibrillation, tachyarrhythmias, heart failure, myocardial infarction, and shock. In rare cases, they may present with myocardial ischemia secondary to coronary artery vasospasm. We report a case of a 59-year-old Malay gentleman who presented with fast atrial fibrillation and tachycardiamediated heart failure that evolved to a silent myocardial infarction secondary to severe coronary artery vasospasm with undiagnosed severe thyrotoxicosis. He had complete resolution of heart failure and no further recurrence of coronary artery vasospasm once treatment for thyrotoxicosis was initiated and euthyroidism achieved. +is life-threatening consequence has an excellent prognosis if recognised early and treated promptly.
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