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Intraoperative hypertension during thyroidectomy for Graves' disease
A K Sharma1, S K Mishra, A Mithal
1Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow.
Summary
Patients with well-controlled Graves' disease experience significant intraoperative cardiovascular instability, including hypertension and tachyarrhythmia. This instability is more common in Graves' disease than in toxic nodular goiter or euthyroid goiter patients.
Area of Science:
- Endocrinology
- Cardiology
- Anesthesiology
Background:
- Hyperthyroidism, particularly Graves' disease, is linked to cardiovascular issues.
- Intraoperative cardiovascular instability can complicate management even in well-controlled hyperthyroid patients.
Purpose of the Study:
- To investigate the incidence and nature of intraoperative cardiovascular instability in patients with Graves' disease compared to other thyroid conditions.
- To identify potential factors contributing to this instability in Graves' disease.
Main Methods:
- Retrospective analysis of 137 patient records.
- Comparison of patients with Graves' disease (n=35), toxic nodular goiter (n=42), and euthyroid benign goiter (n=60).
- Assessment of cardiovascular events like hypertension, tachyarrhythmia, and bradycardia during surgery.
Main Results:
- Graves' disease patients showed a significantly higher incidence of intraoperative hypertension and tachyarrhythmia (9/35) compared to toxic nodular goiter (3/42) and euthyroid goiter (2/60) patients.
- Elevated T3 and T4 levels at presentation correlated with a higher incidence of these cardiovascular complications.
- Despite well-controlled thyrotoxicosis, instability was observed.
Conclusions:
- Well-controlled Graves' disease poses a higher risk of intraoperative cardiovascular instability than other goiter types.
- Further research is needed to explore the roles of catecholamine sensitivity and renin-angiotensin system activation in these findings.