Aa
Aa
A
A
A
Close
Avatar universal

PVCs with L/R BBB shape...

Hello,

Is it correct that PVCs that have RBBB shape have clinical significant and poor progress than those have LBBB shape? Can someone send me a link with PVC with RBBB shape/pattern and PVC with LBBB shape?

Thx  
5 Responses
Sort by: Helpful Oldest Newest
1124887 tn?1313754891
I'm no doctor and hence not an EKG expert, but what you see there is a PVC. Both LBBB and RBBB PVCs are "typical" PVCs. You need a 12 lead EKG to differ between them.
Helpful - 0
Avatar universal
Is what you see a typical PVC? what other PVC shapes do you frequently see or know?
Helpful - 0
1124887 tn?1313754891
No, can't tell just from one lead.
Helpful - 0
Avatar universal
Will you check this PVC and let me know the PVC pattern shape.

http://www.learnekgs.com/pvc.htm
Helpful - 0
1124887 tn?1313754891
PVCs with RBBB shape origin from the left ventricle and vice versa. PVCs are less likely to origin from the left ventricle, because the electrical pattern in the heart is designed so the RV (more accurate: the right ventricle outflow tract) is supposed to fire an escape rhythm if the atria and AV node fails, like during complete AV block.

Concerning the pictures, you may as well google them, and you will find results. As you ask those questions, I assume you are familiar with EKG's and how to interpret them, so the way to determine is to check the precordial leads:

RBBB shape: rSR pattern in V1. LBBB shape: M pattern (RSR) in V5/V6 with inverted T wave.

It's important to realise that early PACs really often mimic PVCs with RBBB configuration. This is known as "aberrant PACs" or "Ashman phenomenon". There are ways to determine this, if you are interested. You can read more about it here:

http://library.med.utah.edu/kw/ecg/ecg_outline/Lesson5/ventricular.html

Or you can just trust your doctor :)

Take care!

Helpful - 0
Have an Answer?

You are reading content posted in the Heart Rhythm Community

Top Arrhythmias Answerers
1807132 tn?1318743597
Chicago, IL
1423357 tn?1511085442
Central, MA
Learn About Top Answerers
Didn't find the answer you were looking for?
Ask a question
Popular Resources
Are there grounds to recommend coffee consumption? Recent studies perk interest.
Salt in food can hurt your heart.
Get answers to your top questions about this common — but scary — symptom
How to know when chest pain may be a sign of something else
A list of national and international resources and hotlines to help connect you to needed health and medical services.
Herpes sores blister, then burst, scab and heal.