Cardiac Electrophysiology Glossary

Catheter-based system that provides real-time feedback on the pressure applied between catheter tip and tissue.

Cardiac muscle fibers within the coronary sinus that can conduct electrical impulses and serve as pathways for atrial ar...

A narrow corridor of conductive tissue essential for maintenance of a reentrant circuit, representing an optimal ablatio...

Cardiac resynchronization therapy defibrillator combining biventricular pacing with defibrillation capability.

An ablation technique that uses extreme cold to destroy abnormal cardiac tissue.

A conduction property where increasing stimulation frequency results in progressively slower conduction velocity and lon...

An accessory conduction pathway that exhibits rate-dependent slowing of conduction velocity.

Low-amplitude electrical signal recorded during VT that represents slow conduction through protected isthmuses in scar t...

Low-amplitude electrical activity recorded during diastole, often indicating slow conduction through arrhythmogenic subs...

The most prevalent frequency component in atrial fibrillation, used to identify drivers and guide ablation strategies.

Conduction that recovers across initially isolated tissue after pharmacological challenge. Indicates incomplete transmur...

The longest coupling interval at which a premature stimulus fails to propagate through cardiac tissue.

A medical emergency characterized by recurrent ventricular tachyarrhythmias requiring multiple interventions. Defined as...

A technique that creates three-dimensional maps of cardiac chambers combining electrical and anatomical information duri...

Computer-based technology that creates three-dimensional maps of cardiac chambers by correlating catheter position with...

Non-invasive mapping technique that reconstructs cardiac electrical activity from body surface ECGs and CT anatomy.

Electrophysiologic technique using pacing to identify critical components of reentrant circuits during arrhythmias.

Percutaneous approach to the pericardial space for mapping and ablation of epicardial arrhythmia substrates.

Accumulations of adipose tissue on the epicardial surface containing autonomic nerve fibers that can trigger atrial arrh...

Electrophysiological mapping performed on the outer surface of the heart. Required when arrhythmia substrates are not ac...

Electrophysiology study - a diagnostic procedure to evaluate the heart's electrical conduction system.

Real-time temperature surveillance during posterior left atrial ablation to prevent thermal injury to the adjacent esoph...

Failure of electrical impulses to conduct out of an ectopic focus or reentrant circuit, despite continued activation wit...

Ventricular tachycardia originating from or involving the left ventricular fascicular conduction system.