Proximal connectors of a pacing lead
Tip of a bipolar temporary pacing electrode showing a distal tip electrode and a proximal ring elecrode. It is customary to give negative polarity to the tip and positive polarity to the ring electrode, as cathodal pacing has a lower threshold. Threshold is the minimum voltage needed for capturing the chamber paced. The proximal connectors of the lead are connected to an external pacemaker.
Tip of a temporary pacing electrode