Search our website Find job opportunies at THI and St. Luke's Find a doctor location and contact information
Heart Information Center
Ask a Heart Doctor
  Back to previous page


Help us improve this service.

Your feedback will help guide us in developing this site.

Ask a Texas Heart Institute Doctor 
Informed patients make better patients.


Can you keep the left side of the heart from weakening when it is pacemaker dependent?

I have LBBB with a rate responsive pacemaker in place for three years now. Would like to know if there has been any success in the regeneration in the neuron cells to unblock the pathway?  Or any success from patients in improvements to keep the left side from weakening on pacemaker dependence?  Thank you.

submitted by Richard on 10/17/2013


J. Alberto Lopez, MDby Texas Heart Institute cardiologist, J. Alberto Lopez, MD    

Second question first: In patients with weak hearts (decreased LV ejection fraction) and LBBB, or in those patients in whom the EF decreases after conventional ventricular pacing (right ventricle), cardiac resynchronization therapy (CRT) by the use of bi-ventricular pacing is able to improve function and symptoms in 70% to 80% of patients.  Discuss with an electrophysiologist whether you are in that group that would benefit from CRT. 

The use of stem cell therapy for conduction defects will not be an option for many, many years to come.

See also on this site:  

Has your question or a similar one already been answered?

Search all the Heart Doctor questions and answers.

To search for a doctor or access St. Luke's physician referral service, use the "Find a Doctor" link at the top of this page.

Updated October 2013
Like us on Facebook Follow us on Twitter Subscribe to us on YouTube Find Us on Flicikr Follow Us on Pinterest Add us on Google+ Find us on LinkedIn 

Please contact our Webmaster with questions or comments.
Terms of Use and Privacy Policy
© Copyright Texas Heart Institute
All rights reserved.