Advanced Dysrhythmias Practice Exam

The choice indicating loose or defective electrodes is a primary cause of ECG artifact. When electrodes are not securely attached to the patient's skin, or if they become defective, they can create noise or irregularities in the electrical signals recorded by the ECG machine. This leads to misinterpretations of the heart's rhythm, as the artifact can mimic or obscure true cardiac activity.

While normal patient movement and medication side effects can also contribute to ECG artifact, loose or defective electrodes are often the most direct and technical reason for such distortions. Loose electrodes can antenna external electrical noise or fail to capture clear signals from the heart, resulting in artifacts that can confuse clinical interpretation. Therefore, ensuring proper electrode placement and functionality is crucial for accurate ECG readings.