Final answer:
Sympathectomy is a surgical intervention that may provide symptomatic relief for a patient with Raynaud's disease who does not respond to diltiazem (Cardizem).
Step-by-step explanation:
The surgical intervention that might be a treatment option for a patient with Raynaud's disease who does not experience symptomatic relief with diltiazem (Cardizem) is sympathectomy. Sympathectomy is a surgical procedure that involves cutting or blocking the sympathetic nerves that control the constriction of blood vessels in the affected area. By interrupting the sympathetic nerve impulses, sympathectomy can help alleviate the symptoms of Raynaud's disease.