Session II: Invasive Diagnosis and Treatment-6154-Techniques to Differentiate SVT Mechanisms- Part II

Video Transcription

Video Summary

In this video, the speaker discusses how ventricular and atrial pacing can be used to differentiate supraventricular tachycardia (SVT) mechanisms. They explain that orthodromic AV reciprocating tachycardia (AVRT) is usually easy to recognize, while atrial tachycardia and atypical AV nodal reentrant tachycardia (AVNRT) can be more difficult to differentiate. The speaker discusses the importance of measuring post-pacing intervals and stem AVA to determine the distance from the circuit, as well as using QRS or intracardiac fusion to recognize the presence of an accessory pathway. They provide examples and explanations for how these techniques can be applied to diagnose various types of SVT, including AVNRT, orthodromic AVRT, and junctional tachycardia. The speaker also cautions about potential pitfalls and emphasizes the importance of a systematic approach and measurements to arrive at an accurate diagnosis. They suggest practicing with ECG tracings to develop proficiency in recognizing different SVT mechanisms.

Keywords

ventricular pacing

atrial pacing

supraventricular tachycardia

AVRT

AVNRT

post-pacing intervals

accessory pathway