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Invasive cardiac electrophysiology studies


Invasive cardiac electrophysiology (EP) is a collection of clinical techniques for the investigation and treatment of cardiac rhythm disorders [1,2]. These techniques permit a detailed analysis of the mechanism(s) underlying the cardiac arrhythmia, precise location of the site of origin, and, when applicable, definitive treatment via catheter-based ablation techniques. Thus, electrophysiology studies can accomplish the following goals (table 1):

Definitive diagnosis of an arrhythmia (supraventricular or ventricular tachyarrhythmias or a bradyarrhythmia)

Establish the etiology for syncope (bradyarrhythmia or tachyarrhythmia), especially in patients with structural heart disease

Stratification for risk of sudden cardiac death

Evaluate the feasibility or outcome of nonpharmacologic therapy (eg, transcatheter radiofrequency ablation, antiarrhythmic surgery, or implantable cardioverter/defibrillator therapy)


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Literature review current through: Jul 2014. | This topic last updated: Jun 26, 2014.
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