RESUMO
A insuficiência cardíaca é uma das complicações mais conhecidas do hipertireoidismo, sendo mais comumente de alto débito, mas alguns pacientes evoluem com miocardiopatia dilatada e baixa fração de ejeção. Apresentamos paciente de 35 anos, sexo masculino, com hipertireoidismo, fibrilação atrial (FA) e insuficiência cardíaca grave com disfunção sistólica e fração de ejeção de 43 por cento. Após o tratamento definitivo do hipertireoidismo com radioiodo, houve reversão da insuficiência cardíaca, com melhora clínica e ecocardiográfica, incluindo normalização da fração de ejeção (69 por cento). Vários são os casos descritos de reversão da insuficiência cardíaca com o tratamento do hipertiroidismo, porém na sua maioria de insuficiência cardíaca de alto débito. Os mecanismos pelo qual o hipertireoidismo pode levar à disfunção sistólica, assim como seu tratamento, são discutidos. Concluímos que o tratamento do hipertireoidismo pode recuperar a miocardiopatia tireotóxica, mesmo em casos mais graves com comprometimento da função sistólica.
Heart failure is one of the most known complications of hyperthyroidism, more commonly high-output heart failure, but some patients may develop dilated cardiomyopathy with low ejection fraction. We report a 35-year-old man, with hyperthyroidism, atrial fibrillation, and severe heart failure with 43 percent of ejection fraction. After the definitive treatment of the hyperthyroidism with radioiodine, heart failure was reverted, with symptomatic improvement and echocardiographic normalization including a normal ejection fraction (69 percent). There are several cases of reversion of heart failure due to hyperthyroidism treatment, but most of them with a high-output heart failure. Mechanisms by which hyperthyroidism can lead to heart failure and its treatment are discussed. We conclude that treatment of hyperthyroidism may reverse this thyroid related heart failure, even in severe cases with systolic dysfunction.
Assuntos
Adulto , Humanos , Masculino , Cardiomiopatia Dilatada/etiologia , Insuficiência Cardíaca/etiologia , Hipertireoidismo/complicações , Cardiomiopatia Dilatada/terapia , Insuficiência Cardíaca/terapia , Hipertireoidismo/terapia , Disfunção Ventricular/etiologiaRESUMO
Heart failure is one of the most known complications of hyperthyroidism, more commonly high-output heart failure, but some patients may develop dilated cardiomyopathy with low ejection fraction. We report a 35-year-old man, with hyperthyroidism, atrial fibrillation, and severe heart failure with 43% of ejection fraction. After the definitive treatment of the hyperthyroidism with radioiodine, heart failure was reverted, with symptomatic improvement and echocardiographic normalization including a normal ejection fraction (69%). There are several cases of reversion of heart failure due to hyperthyroidism treatment, but most of them with a high-output heart failure. Mechanisms by which hyperthyroidism can lead to heart failure and its treatment are discussed. We conclude that treatment of hyperthyroidism may reverse this thyroid related heart failure, even in severe cases with systolic dysfunction.