Cardiac Electrophysiology Glossary

A specialized catheter used to deliver energy for destroying abnormal cardiac tissue during electrophysiology procedures...

An electrophysiologic technique that determines the temporal sequence of electrical activation across cardiac tissue dur...

A diagnostic test using intravenous adenosine to unmask concealed accessory pathways or confirm AV nodal-dependent arrhy...

Electroanatomical mapping technique that displays electrogram voltage amplitudes as color-coded overlays on cardiac geom...

Directional dependence of electrical conduction velocity in cardiac tissue due to fiber orientation and gap junction dis...

Electrical impulse transmission in the normal forward direction through cardiac conduction pathways.

A form of AVRT where conduction travels down the accessory pathway and returns via the AV node, producing a wide QRS com...

A hereditary cardiomyopathy characterized by fibrofatty replacement of right ventricular myocardium, predisposing to ven...

A common cardiac arrhythmia characterized by irregular and rapid atrial contractions.

Programmed delay between atrial and ventricular pacing in dual-chamber devices to optimize cardiac hemodynamics.

Atrioventricular nodal reentrant tachycardia - a common regular supraventricular tachycardia involving dual AV nodal pat...

Complete interruption of electrical conduction in both directions across a line of ablation, confirming successful isola...

An intracardiac recording obtained between two closely spaced electrodes, providing superior signal resolution and noise...

Abnormally slow heart rhythm, typically below 60 beats per minute, requiring careful clinical correlation.

An inherited channelopathy characterized by distinctive ECG patterns and increased risk of sudden cardiac death from ven...

High-frequency electrical stimulation delivered to terminate arrhythmias or assess conduction properties.

An inherited arrhythmogenic disorder triggered by adrenergic stimulation, characterized by exercise-induced ventricular...

An atrial arrhythmia that circuits around scar tissue, often occurring after cardiac surgery or previous ablation. Chara...

Mapping technique using simultaneous pacing from multiple sites to identify conduction pathways and barriers.

Incomplete electrical conduction through cardiac tissue that influences subsequent impulse propagation without producing...

A pacing technique where overdrive pacing from within a reentrant circuit produces concealed fusion, confirming circuit...

A pacing technique that targets the cardiac conduction system rather than ventricular myocardium. Includes His-bundle an...

The perpendicular pressure exerted between an ablation catheter tip and cardiac tissue, measured in grams.

Catheter technology providing real-time measurement of tip contact pressure against tissue during ablation.