What is an electrophysiological study?

Electrophysiological study is a diagnostic method that uses intracardiac electrocardiogram recording and endocardial stimulation techniques to diagnose arrhythmias and evaluate treatment efficacy. The details are as follows:
Electrophysiological study is a procedure used in cardiology, typically performed on patients with stable conditions who can lie flat during the examination. During the procedure, electrodes are inserted via the subclavian vein and femoral vein and advanced into the heart chambers. This allows assessment of the cardiac conduction system through cardiac pacing at specific sites. Electrophysiological study enables mapping of intracardiac electrograms, helping to diagnose conditions such as paroxysmal atrial fibrillation, paroxysmal supraventricular tachycardia, and atrioventricular conduction block. It also allows evaluation of the effectiveness of radiofrequency ablation procedures.
After undergoing an electrophysiological study, if symptoms of paroxysmal supraventricular tachycardia are present, medications such as adenosine injection or disodium adenosine triphosphate injection may be used under a physician's guidance for treatment.