(FIT)-Module 3 Workshop 4: SVT and VT Invasive and Non-Invasive Correlation-Marchlinski Case 5 Answer

Video Transcription

Video Summary

The discussion highlights that the tachycardia is narrower than AV-conducted beats in sinus rhythm, indicating a ventricular tachycardia (VT). Key observations include an incomplete left bundle branch block and more Vs than As, with the first beat demonstrating VA block. Unlike supraventricular rhythms, VT doesn’t widen QRS complexes as expected. Instead, the narrowing occurs due to simultaneous activation from a septal origin, contrasting with the delayed activation seen in bundle branch block patterns. These characteristics confirm the diagnosis of VT, underscoring the importance of observing VA block and complex width in arrhythmia analysis.

Keywords

ventricular tachycardia

narrow QRS complex

left bundle branch block

VA block

arrhythmia diagnosis