Differential diagnosis of tachycardia with a typical left bundle …
LBBB is defined as a prolonged QRS duration (≥ 120 ms) with broad monophasic R waves in leads I, V5 and V6 that are usually notched or slurred. There is delayed onset of the intrinsicoid deflection (the beginning of the QRS to the peak of the R wave is > 50 ms) in leads I, V5 and V6.
VT versus SVT • LITFL Medical Blog • ECG Library Basics
Oct 8, 2024 · Electrocardiographic features that increase the likelihood of VT include: Absence of typical RBBB or LBBB morphology. Extreme axis deviation (“northwest axis”): QRS positive in aVR and negative in I and aVF.
SVT with Aberrancy or Ventricular Tachycardia? - ACLS Medical …
Aug 27, 2024 · Mistaking SVT with aberrancy for VT can lead to the administration of antiarrhythmic medications or cardioversion, which can be harmful if the underlying rhythm is SVT. SVT With Aberrancy vs. VT. Differentiating between SVT with aberrancy and VT can help determine the appropriate treatment.
Supraventricular Tachycardia (SVT) • LITFL • ECG Library Diagnosis
Oct 8, 2024 · A review of the different types of supraventricular tachycardia (SVT) with a focus on AV-nodal re-entry tachycardia (AVNRT).
Left Bundle Branch Block (LBBB) • LITFL • ECG Library Diagnosis
Oct 8, 2024 · Left bundle branch block (LBBB): 1) rS complex in V1 (tiny R wave, deep S wave) 2) Characteristic lateral lead morphology in V5-6 3) Note appropriate discordance in V1 with ST elevation and upright T wave
Ventricular Arrhythmias and Bundle-Branch Block
Jun 13, 2016 · Left bundle-branch block (LBBB) is rarely seen in individuals with healthy hearts. It appears most commonly in elderly individuals with diseased hearts. LBBB may be temporary or chronic, and may be rate-related. The most common cause is hypertensive heart disease. Other causes are the same as with RBBB.
Left Bundle Branch Block: Causes, Symptoms & Treatment - Cleveland Clinic
Left bundle branch block (LBBB) occurs when something blocks or disrupts the electrical impulse that causes your heart to beat. This block leads to an abnormal heart rhythm. A diagnosis of left bundle branch block often means that you have an underlying heart condition.
Supraventricular tachycardia (SVT) - EMCrit Project
Jan 5, 2025 · causes of supraventricular tachycardia. Common: Sinus tachycardia. Atrial fibrillation (AFib) or Atrial Flutter (AFlutter). AVNRT (AV non-reentrant tachycardia). Less common: MAT (multifocal atrial tachycardia). FAT (focal …
SVT With Aberrancy Versus VT - REBEL EM - Emergency Medicine Blog
Nov 22, 2013 · Determine if you have a LBBB morphology (dominant S wave in V1) or a RBBB morphology (dominant R wave in V1) then use the appropriate section below to help differentiate. 4a. LBBB Morphology: Dominant S Wave in V1 or V2
Left bundle branch block (LBBB): ECG criteria, causes, …
Learn about left bundle branch block (LBBB), with emphasis on ECG criteria, differential diagnoses, causes, management and diagnosis of ischemia/infarction.