Pin-Hsu LiaoYu-Cheng ChengPo-Yu LiuI-Te Lee2026-02-022026-02-022022-06-2410.1097/MD.0000000000029243https://scholars.csmu.edu.tw/handle/123456789/4493<jats:title>Abstract</jats:title> <jats:sec> <jats:title>Rationale:</jats:title> <jats:p>Coronavirus disease 2019 (COVID-19) is a systemic disease with major clinical manifestations in the respiratory system. However, thyroid involvement has also been reported. We present a case of hypothyroidism with ventricular tachycardia following diagnosis with COVID-19.</jats:p> </jats:sec> <jats:sec> <jats:title>Patient concerns:</jats:title> <jats:p>A 77-year-old man was admitted to the isolation ward due to COVID-19. After respiratory support and medical treatment, the patient was successfully weaned off the ventilator. However, an episode of short-run ventricular tachycardia was detected, and primary hypothyroidism was also diagnosed.</jats:p> </jats:sec> <jats:sec> <jats:title>Diagnosis:</jats:title> <jats:p>Ventricular tachycardia was detected by electrocardiography.</jats:p> </jats:sec> <jats:sec> <jats:title>Interventions:</jats:title> <jats:p>Intravenous amiodarone administration and oral levothyroxine replacement.</jats:p> </jats:sec> <jats:sec> <jats:title>Outcomes:</jats:title> <jats:p>No arrhythmia detected following treatment.</jats:p> </jats:sec> <jats:sec> <jats:title>Lessons:</jats:title> <jats:p>Awareness of the association between hypothyroidism and COVID-19 is important in preventing possible complications.</jats:p> </jats:sec>[SDGs]SDG3journal-article