Key result
Sinus rhythm pacing identifies critical slow conduction zones localizing VT sites of origin.
Why the study?
The relationship between slow conduction zones identified by pacing during sinus rhythm and the site of origin of ventricular tachycardia was unclear.
Case Report (n=3)
No
Pacing during sinus rhythm can identify slow conduction zones with prolonged St-QRS intervals that are involved in the reentry circuit of ventricular tachycardia, offering a potential target for catheter ablation.
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Chinushi et al. (1992) conducted a case report in Recurrent sustained ventricular tachycardia (n=3). Pacing during sinus rhythm was evaluated on Identification of slow conduction zones (prolonged St-QRS interval) and their relation to the site of origin of ventricular tachycardia. Pacing during sinus rhythm identified slow conduction zones with prolonged St-QRS intervals (70-150 ms) that were related to the site of origin of ventricular tachycardia in all 3 patients.
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