Thyroid storm
Alternative Names
Thyrotoxic storm; Hyperthyroid storm; Accelerated hyperthyroidism
Definition
Thyroid storm is a life-threatening condition that develops in cases of untreated thyrotoxicosis (hyperthyroidism, or overactive thyroid).
Causes
Thyroid storm occurs in people with untreated hyperthyroidism. It is usually brought on by a major stress such as trauma, heart attack, or infection. Thyroid storm is very rare.
Symptoms
Symptoms are severe and may include any of the following:
- Agitation
- Change in alertness (consciousness)
- Confusion
- Diarrhea
- Increased temperature
- Pounding heart (tachycardia)
- Restlessness
- Shaking
- Sweating
Exams and Tests
- The systolic (top number) blood pressure reading may be high, and the diastolic (bottom number) blood pressure may be low
- Heart rate is increased
Possible Complications
Irregular heart rhythms (arrhythmias) may occur. Heart failure and pulmonary edema can develop rapidly and lead to death.
When to Contact a Medical Professional
This is an emergency condition. Call 911 or another emergency number if you have hyperthyroidism and experience symptoms of thyroid storm.
References
Bahn RS, Burch HB, Cooper DS, et al. Hyperthyroidism and other causes of thyrotoxicosis: Management Guidelines of the American Thyroid Association and American Association of Clinical Endocrinologists. Endocr Pract. 2011;17:457-520.
Mandel SJ, Larsen PR, Davies TF. Thyrotoxicosis. In: Melmed S, Polonsky KS, Larsen PR, Kronenberg HM. Williams Textbook of Endocrinology. 12th ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 12.