What does a 12 lead EKG trace?

A 12-lead EKG (electrocardiogram) is a diagnostic tool specifically designed to record the electrical activity of the heart. It measures the heart's electrical impulses from multiple angles, providing a comprehensive view of its rhythm and overall function. By utilizing twelve leads, the EKG captures a full representation of the heart's electroactivity, allowing healthcare providers to detect various conditions, such as arrhythmias, heart block, and ischemic heart disease.

Each lead corresponds to specific placements on the body, which enables the EKG to show how electrical impulses travel through the heart muscles. This information is crucial for making informed clinical decisions regarding a patient's cardiac health.

Other options do not pertain to a 12-lead EKG: blood pressure levels are measured by a sphygmomanometer, oxygen saturation is assessed using a pulse oximeter, and the respiratory rate is noted through various means, but none involve the EKG's capabilities. Therefore, the primary function and significance of a 12-lead EKG lie in its ability to trace the heart’s electrical activity.