Docsity
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Docsity AI
Docsity AI
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search for your university

Find the specific documents for your university's exams

Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

Left bundle branch Pacing ecg, Summaries of Cardiology

Maharashtra University of Health SciencesCardiology

Left bundle branch Pacing ecg analysis

Typology: Summaries

2025/2026

Uploaded on 06/13/2026

neet-aipg-newstips
neet-aipg-newstips 🇮🇳

13 documents

1 / 2

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
12-Lead ECG Differentiation: LBB vs Fascicular vs
Deep Septal Pacing
1. True Left Bundle Branch (LBB) Pacing
• QRS: <120–130 ms
• V1: rSR′ / qR / R pattern
• V6: Tall R, no S
• Axis: Normal
• V6 RWPT: <80 ms
• Early transition (V2–V3)
2. Posterior Fascicular Pacing
• Axis: Left axis deviation
• Inferior leads: Negative
• V1: RBBB pattern
• QRS: 110–140 ms
• V6 RWPT: >80 ms
3. Anterior Fascicular Pacing
• Axis: Right axis deviation
• Inferior leads: Positive
• V1: RBBB pattern
• QRS: Mildly prolonged
• V6 RWPT: Slightly delayed
4. Deep Septal Pacing
• QRS: >130–150 ms
• V1: QS / rS
• V6: Broad R
• Axis: Variable
• V6 RWPT: >90–100 ms
• Late transition (V4–V6)
Summary Table
Feature True LBB Posterior Fascicle Anterior Fascicle Deep Septal
Axis Normal Left Right Variable
QRS Narrow Mild wide Mild wide Wide
pf2

Partial preview of the text

Download Left bundle branch Pacing ecg and more Summaries Cardiology in PDF only on Docsity!

12-Lead ECG Differentiation: LBB vs Fascicular vs

Deep Septal Pacing

1. True Left Bundle Branch (LBB) Pacing

  • QRS: <120–130 ms
  • V1: rSR′ / qR / R pattern
  • V6: Tall R, no S
  • Axis: Normal
  • V6 RWPT: <80 ms
  • Early transition (V2–V3)

2. Posterior Fascicular Pacing

  • Axis: Left axis deviation
  • Inferior leads: Negative
  • V1: RBBB pattern
  • QRS: 110–140 ms
  • V6 RWPT: >80 ms

3. Anterior Fascicular Pacing

  • Axis: Right axis deviation
  • Inferior leads: Positive
  • V1: RBBB pattern
  • QRS: Mildly prolonged
  • V6 RWPT: Slightly delayed

4. Deep Septal Pacing

  • QRS: >130–150 ms
  • V1: QS / rS
  • V6: Broad R
  • Axis: Variable
  • V6 RWPT: >90–100 ms
  • Late transition (V4–V6)

Summary Table

Feature True LBB Posterior Fascicle Anterior Fascicle Deep Septal Axis Normal Left Right Variable QRS Narrow Mild wide Mild wide Wide

V1 RBBB pattern RBBB pattern RBBB pattern QS/rS

V6 RWPT <80 ms 80–90 ms 80–90 ms >90–100 ms