2015年11月15日 · SVT with RBBB (supraventricular tachycardia with right bundle branch block) pattern as evidenced by the slurred S wave in lead I and aVL and rSR’ pattern in V1. The right bundle conduction is slower during tachycardia and hence right bundle aberrancy is more likely to occur than left bundle aberrancy.

2024年10月8日 · RBBB: Right Bundle Branch Block V1: RSR’ pattern in V1, with (appropriate) discordant T wave changes V6: Widened, slurred S wave in V6. Associated features incude: Appropriate discordance with ST depression and/or T-wave inversion in …

2017年9月12日 · Wellens et al 16 demonstrated that ≈70% of RBBB type VTs associated with structural heart disease exhibit QRS duration >140 ms as opposed to SVT with RBBB. For wide QRS tachycardia with a left bundle branch block pattern, a cutoff of 160 ms was chosen above which VT is more likely.

ECG shows SVT with RBBB pattern as evidenced by the slurred S wave in lead I and aVL and rSR’ pattern in V1. Description at: https://johnsonfrancis.org/profession... The right bundle conduction...

2017年9月12日 · Idiopathic ventricular tachycardia (VT) using the left posterior fascicle can be easily mistaken for supraventricular tachycardia (SVT) with right bundle branch block (RBBB) and left anterior fascicular block (LAFB), and distinguishing these entities via ECG analysis is essential for appropriate management.

2021年2月1日 · The RS/QRS ratio >0.41 in lead V 6 is a simple and reliable index for distinguishing VT from SVT in RBBB pattern wide QRS complex tachycardia with a reversed R/S complex in lead V 6. This criterion was particularly useful for the differential diagnosis of fascicular VT from RBBB pattern SVT.

In patients with pre‐existing or “fixed” (present during the normal baseline rhythm) bundle branch block (BBB), any SVT results in a broad complex tachycardia. However, rate related and/or “functional” (present only during tachycardia) BBB may also result in WCT.

2025年2月25日 · At this point, the typical bundle branch block characteristics of V1 (V2) need to be differentiated in conjunction with conduction and waveform features.As the most important step in differentiating from SVT, the Prelocalization Algorithm compared to the Brugada Four-Step Algorithm has improved the diagnosis of RBBB characteristics (added the ...

Supraventricular Tachycardia with Aberrant Conduction, Underlying RBBB. (ECG contributor: Walter Clair, MD.) Wide-complex tachycardia with a rate of 188 bpm. This patient has sudden onset of SVT with a known underlying RBBB. QRS complexes are wide (lower double arrows) and R-R intervals are regular (upper double arrows).

Differentiation of supraventricular tachycardia (SVT) with a right bundle branch block (RBBB) pattern from ventricular tachycardia (VT) is difficult, particularly when the R/S ratio in lead V 6 is below 1.0. We sought to investigate the electrocardiographic criteria for distinguishing between these arrhythmias.