Cardiac Electrophysiology Glossary

A measurement combining catheter contact force and application duration during ablation. Predictive parameter for lesion...

Complex, multicomponent electrical signal indicating abnormal conduction typically targeted during substrate ablation.

The shortest interval between two consecutively conducted impulses through a specific cardiac structure.

The resumption of conduction at shorter coupling intervals after conduction block has occurred at longer coupling interv...

Physiologic pacing technique targeting the His bundle to preserve normal ventricular activation patterns.

An intracardiac electrogram that records electrical activity from the His bundle, enabling precise analysis of AV conduc...

The specialized conduction pathway consisting of the bundle of His and Purkinje fibers that conducts electrical impulses...

A specialized recording that captures electrical activity from the His bundle. Used for precise assessment of atrioventr...

A combined surgical and catheter-based approach for treating atrial fibrillation. Involves epicardial surgical ablation...

Implantable cardioverter defibrillator - a device that monitors heart rhythm and delivers therapy for life-threatening a...

A decrease in electrical resistance between catheter electrode and tissue during radiofrequency ablation. Indicates effe...

Systematic pacing protocols used to provoke arrhythmias during electrophysiology study for diagnostic or therapeutic ass...

Real-time ultrasound imaging performed from within the heart using a specialized catheter. Provides visualization of car...

An ablation catheter with saline irrigation through the tip electrode to prevent overheating and enable deeper tissue pe...

Pharmacologic provocation test using beta-adrenergic stimulation to unmask latent arrhythmias during EP studies.

A type of atrial flutter where the reentrant circuit travels around the tricuspid annulus through the cavotricuspid isth...

MRI technique identifying myocardial scar and fibrosis critical for ventricular tachycardia substrate characterization.

Left bundle branch area pacing technique targeting the conduction system for physiologic ventricular activation.

The joining of adjacent ablation lesions to create continuous lines of tissue injury and electrical block.

The continuous, gap-free connection between adjacent ablation lesions. Essential for creating effective conduction block...

Abnormal electrical signals recorded from diseased ventricular tissue, characterized by low amplitude and fractionated m...

A large reentrant circuit typically involving anatomical structures or extensive scar tissue as circuit boundaries.

Regular wide-complex tachycardia with consistent QRS morphology typically arising from reentrant circuits in scarred myo...

The process of comparing induced arrhythmia morphology with clinically documented episodes to confirm the therapeutic ta...