V-pak The Simple Answer for Your Electrode Needs ZOLL's V-pak® electrode has been designed for use by all clinicians who take 12-lead ECGs. This ZOLL defibrillator electrode is a simple, easy to use pre-connected lead wire system that attaches to the ZOLL 12-lead patient cable without opening the package. The use of lighter pre-connected lead wires with the easy-to-open packaging helps address the key issues facing many clinicians: dried out electrodes and multiple lead wire attachments. Eliminates tangled wires as well as multiple connections. Why Use V-pak? Pre-connect speeds patient hook-up and keeps electrodes from drying out. Pre-wired electrodes reduce chance of lead wire disconnects. Organized lead wires eliminate tangles. Sequentially placed electrodes provide easy electrode set-up. Smaller packaging optimizes case storage.