Superior vena cava (SVC) syndrome occurs when the superior vena cava, a large vein that carries blood to the heart from the upper part of the body, becomes compressed or obstructed. However, the most appropriate action the nurse can take for a client with SVC syndrome is to immediately notify the healthcare provider, as this is a medical emergency that requires prompt treatment. They can also monitor the client's vital signs, oxygen saturation levels, and respiratory status. In certain cases, the use of oxygen therapy, diuretics and corticosteroids are implemented to manage symptoms. The nurse must ensure that the client is comfortable and is provided with appropriate supportive and symptomatic management based upon clinical findings and the clinical judgment of the healthcare provider.