What typically causes an interrupted baseline in an EKG tracing?

An interrupted baseline in an EKG tracing is often caused by a disconnected or broken lead wire. In an EKG, lead wires connect the electrodes placed on the skin to the machine that records the heart's electrical activity. If one of these leads is not properly attached, or if it has a break in the wire, the electrical signals from that particular lead will not be transmitted correctly, resulting in gaps or interruptions on the EKG tracing.

When diagnosing EKG issues, it is crucial to ensure that all lead wires are securely connected and functioning properly. A clear baseline is necessary for interpreting the heart's electrical activity accurately, as interruptions can mimic arrhythmias or other heart conditions, leading to misdiagnosis.

Other factors, such as improper patient positioning, electrical interference, and excessive muscle movement, can cause changes in EKG readings, but they would not specifically result in an interrupted baseline caused by a mechanical failure of the connection between the electrodes and the machine.