title: A transient hypotensive episode (Bezold-Jarisch effect) occurring in a patient treated with microwave hyperthermia.
abstract: A case report of a hypotensive episode occurring during a microwave hyperthermia treatment is reported. Microwave hyperthermia was delivered using 915 MHz externally applied energy. The tumor being treated was either a superficial lymph node or local recurrence in the subdigastric region overlying the carotid artery. During the patient's treatment, she reported symptomatology consistent with a neuropathy which is characterized by its association with microwave energy. As the treatment progressed the patient developed syncopy, hypotension, and bradycardia similar to a Bezold-Jarisch reflex. All of these conditions promptly self-corrected when the microwave energy was discontinued. This event can be explained by a transient microwave induced neuropathy specifically involving the carotid body or sinus.
mesh_terms: D001919:Bradycardia / Q000209:etiology; D005260:Female; D006801:Humans; D006979:Hyperthermia, Induced / Q000009:adverse effects*; D007022:Hypotension / Q000209:etiology*; D008872:Microwaves / Q000009:adverse effects*; D008875:Middle Aged; D010523:Peripheral Nervous System Diseases / Q000209:etiology; D013575:Syncope / Q000209:etiology