Superior Vena Cava Syndrome (SVCS): Symptoms, Causes & Relief

Superior Vena Cava Syndrome (SVCS) is a medical emergency caused by obstruction of the SVC (returns blood from head, neck, upper extremities, upper thorax to right atrium).

Classic Presentation

• Facial/neck/arm swelling (edema), worse supine
• Dyspnea, orthopnea, stridor
• Distended neck/chest veins
• Headache, dizziness, confusion
• Cough, hoarseness, dysphagia

Etiologies

1. Malignancy (90%): lung cancer (SCLC, NSCLC), lymphoma, metastatic breast/testicular.
2. Thrombosis: central lines, pacemakers, hypercoagulable states.
3. Benign: fibrosis (post-radiation), aortic aneurysm, thymoma.
4. Infection: histoplasmosis, TB.

Management

• Emergent: Head elevation, oxygen, diuretics (cautious), corticosteroids (if malignant).
• Definitive: Treat underlying cause – chemo/radiation (malignancy), anticoagulation/thrombolysis (thrombosis), stenting (malignant/benign), surgery.

Immediate hospitalization required.