Superior Vena Cava — ECG/EKG Terminology

Definition: A large vein that receives blood from the head, neck, upper extremities, and thorax and delivers it to the right atrium of the heart.

Key Facts

• Drains head, neck, upper chest, and upper extremities into the right atrium.
• High central venous pressure can produce venous congestion signs.
• Often used for central venous catheter access.

ECG Connection: Catheter placement near the right atrium can trigger ectopy if tip position is too deep.

Why It Matters: New ectopy after line placement should prompt lead check and clinical reassessment.