Certified Rhythm Analysis Technician (CRAT) Practice Exam 2026 – All-in-One Study Guide for Exam Success!

The drifting off center of the baseline on an ECG is referred to as a wandering baseline. This phenomenon typically occurs when there is movement or a change in the patient's position that affects the electrodes. Factors contributing to a wandering baseline include patient movement, respiration, or poor electrode adhesion. When these issues arise, it can result in the baseline moving up and down, making it difficult to accurately interpret the heart's electrical activity.

Understanding the wandering baseline is crucial since it can interfere with the ability to identify true changes in heart rhythms. Recognizing and addressing the underlying causes, such as repositioning electrodes or ensuring the patient remains still, can help achieve a clearer ECG reading.