What is the goal of a diagnostic EP study?

• A. To map coronary arteries
• B. To assess function of cardiac conduction system and observe dysfunctions or anomalies that can contribute to an arrhythmia
• C. To measure ejection fraction
• D. To determine blood oxygen levels

Answer: (B)

The goal of a diagnostic EP study is to evaluate the heart’s electrical system and its tendency to cause arrhythmias by mapping the conduction pathways, measuring refractory periods and conduction properties, and testing whether arrhythmias can be induced under controlled conditions. During the procedure, catheters are placed inside the heart to record electrical activity and to deliver programmed stimulation, which helps identify abnormal conduction (such asSlow or fast pathways, reentrant circuits, or accessory pathways) and determine the mechanism of tachycardias. This information directly informs whether ablation or other targeted therapies are appropriate. This focus on electrical function and arrhythmia susceptibility distinguishes an EP study from tests that map coronary arteries, assess pumping function like ejection fraction, or measure blood oxygen levels.