How often should ECG electrodes be changed?

• A. Every 72 hours
• B. Every 24 to 48 hours
• C. Weekly
• D. Only when symptoms change

Answer: (D)

Regular replacement of ECG electrodes is about keeping monitoring reliable and skin safe. Electrodes lose adhesion as the gel dries, skin oils build up, and resident moisture or sweating can affect contact. When contact quality declines, the ECG tracing becomes unreliable, which can hide dangerous rhythms or lead to skin irritation and infection if the same electrodes stay on too long. Because of that, the best practice is to change electrodes on a routine schedule—most hospitals do this every 24 hours or per the device manufacturer and local protocol—and sooner if adhesion is poor, there is skin breakdown, or the signal quality deteriorates. Waiting for symptoms to change isn’t a dependable trigger, since not all issues produce noticeable symptoms and poor electrode contact can go unnoticed until a problem is detected in the tracing. So, changing electrodes at least daily (or per protocol) is the safer, more effective approach.