Thyrotoxicosis is an uncommon cause of low-output congestive heart failure. The case of a 41-year-old male who presented with severe symptomatic congestive heart failure, and was subsequently diagnosed with dilated cardiomyopathy secondary to hyperthyroidism, is presented. The cause of his hyperthyroidism was Graves disease. Despite an initial left ventricular systolic ejection fraction of 20% and evidence of global hypokinesis on echocardiography, treatment with antithyroid agents led to rapid improvement in his clinical status and normalization of his ejection fraction. The proposed mechanisms underlying the development of systolic dysfunction in thyrotoxicosis are discussed, and the literature on similar cases previously reported is reviewed.
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Chungbuk Natl Univ, Coll Vet Med, Lab Vet Internal Med, Cheongju 28644, Chungbuk, South KoreaChungbuk Natl Univ, Coll Vet Med, Lab Vet Internal Med, Cheongju 28644, Chungbuk, South Korea
Lee, Hayoon
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Lee, Dohee
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Park, Jooyoung
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Yun, Taesik
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Koo, Yoonhoi
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Chae, Yeon
Kang, Byeong-Teck
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Chungbuk Natl Univ, Coll Vet Med, Lab Vet Internal Med, Cheongju 28644, Chungbuk, South KoreaChungbuk Natl Univ, Coll Vet Med, Lab Vet Internal Med, Cheongju 28644, Chungbuk, South Korea
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Tokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan
Tokyo Med & Dent Univ Hosp, Dept Profess Dev, Tokyo, JapanTokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan
Uchihara, Masaki
Ehara, Jun
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Tokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan
Tokyo Bay Urayasu Ichikawa Med Ctr, Dept Pulm Med, Urayasu, Chiba, JapanTokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan
Ehara, Jun
Iwanami, Keiichi
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Tokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan
Tokyo Bay Urayasu Ichikawa Med Ctr, Dept Rheumatol, Urayasu, Chiba, JapanTokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan
Iwanami, Keiichi
Kitamura, Koichi
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Tokyo Bay Urayasu Ichikawa Med Ctr, Dept Nephrol Endocrinol & Diabet, Urayasu, Chiba, JapanTokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan
Kitamura, Koichi
Suzuki, Toshihiko
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Tokyo Bay Urayasu Ichikawa Med Ctr, Dept Nephrol Endocrinol & Diabet, Urayasu, Chiba, JapanTokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan
Suzuki, Toshihiko
Ishizuka, Noriyoshi
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Tokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, JapanTokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan
Ishizuka, Noriyoshi
Yamada, Toru
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Tokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan
Tokyo Med & Dent Univ, Grad Sch Med & Dent Sci, Dept Family Med, Tokyo, JapanTokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan
Yamada, Toru
Hiraoka, Eiji
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Tokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, JapanTokyo Bay Urayasu Ichikawa Med Ctr, Dept Internal Med, Urayasu, Chiba, Japan