A woman in her mid-20s who was clinically euthyroid presented with an ostium secondum atrial septal defect for closure. Preoperatively, heart rate ranged from 80 to 110 beats per minute. On the day of surgery, heart rate was 120 beats per minute, which settled after induction. During ultrasound guided central line access, a thyroid swelling was noticed. 20–30 min after commencement of the surgery, heart rate increased up to 130 beats per minute. Since other causes of tachycardia was ruled out, an intraoperative blood sample for thyroid function test was sent. Esmolol was kept ready in case the swelling turned out to be hyperfunctioning thyroid nodule. Post bypass, the patient again developed tachycardia. The thyroid function test showed elevated T3, T4 and a mildly elevated TSH (Thyroid stimulating hormone) value, consistent with an extrathyroid source. The patient is on long-term follow-up under an endocrinologist. Postoperatively, she is again euthyroid and heart rates have settled to less than 100 beats per minute.
- Cardiovascular medicine
- Cardiovascular system
- Endocrine system
- Thyroid disease
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Contributors All the authors, RJn, RJi and JR, contributed equally to the conception and design, acquisition of data, analysis and interpretation of data, drafting the article, revising it critically for important intellectual content and final approval of the version published. All the authors agree to be accountable for the article and to ensure that all questions regarding the accuracy or integrity of the article are investigated and resolved.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Case reports provide a valuable learning resource for the scientific community and can indicate areas of interest for future research. They should not be used in isolation to guide treatment choices or public health policy.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.