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Graves' Disease Combined With Orthostatic Hypotension: A Two-Case Report.

Graves' disease (GD) is the most common cause of hyperthyroidism in the clinic, accounting for about 85% of all hyperthyroidisms. However, hyperthyroidism combined with OH has been rarely reported in the international community. We analyzed the clinical characteristics and pathogenesis of GD combined with orthostatic hypotension. We conducted a retrospective analysis of 2 GD combined with orthostatic hypotension cases diagnosed by Chinese and Western Medical Association Hospital of Southern Medical University from July to August 2018 and discussed their clinical characteristics, treatment methods, and pathogenesis. The main clinical manifestations of both two patients with hyperthyroidism were vertigo during postural changes or activities and relief from supine position and blood volume supplementation. Considering the lack of blood volume, the symptoms were alleviated after symptomatic treatment. The possibility of hyperthyroidism combined with orthostatic hypotension should be taken into consideration in clinical diagnosis and treatment.