# Tachycardia Termination Without Global Propagation: Is the Pacing Site In or Out?

## TL;DR

This paper discusses how pacing the heart without full electrical spread can help identify key areas in tachycardia circuits.

## Contribution

It introduces a new criterion for identifying re-entrant circuits in tachycardia using non-global pacing capture.

## Key findings

- Non-global capture pacing can identify critical parts of tachycardia circuits.
- This method works even without concealed entrainment confirmation.
- Extrastimuli can be used intentionally to demonstrate this phenomenon.

## Abstract

Ventricular tachycardia termination by pacing with non-global capture is a specific criterion for identifying a critical component of the re-entrant circuit, regardless of whether concealed entrainment can be demonstrated at that site. It is usually observed almost by chance, but it can also be intentionally demonstrated by introducing a single extrastimulus during tachycardia.