The Relationship between Bundle Branch Block and Myocardial Infarction and Its Impact on Cardiac Resynchronization Therapy

2020 ◽  
Vol 08 (02) ◽  
pp. 7-13
Author(s):  
羽中 张
Keyword(s):  
Myocardial Infarction ◽  
Cardiac Resynchronization Therapy ◽  
Cardiac Resynchronization ◽  
Resynchronization Therapy ◽  
Bundle Branch Block ◽  
The Relationship

scholarly journals The definition of left bundle branch block influences the response to cardiac resynchronization therapy

2018 ◽  
Vol 269 ◽  
pp. 165-169 ◽  
Author(s):  
Maria Luce Caputo ◽  
Antonius van Stipdonk ◽  
Annekatrin Illner ◽  
Gabriele D'Ambrosio ◽  
François Regoli ◽  
...  
Keyword(s):  
Cardiac Resynchronization Therapy ◽  
Left Bundle Branch Block ◽  
Cardiac Resynchronization ◽  
Resynchronization Therapy ◽  
Bundle Branch Block ◽  
Definition Of

Abstract P64: Right Ventricular Outflow Septal Pacing as Cardiac Resynchronization Therapy in Patients with Right Bundle-Branch Block: Results in 62 Patients

2011 ◽  
Vol 4 (suppl_2) ◽  
Author(s):  
Phillip E Schrumpf ◽  
Michael Giudici ◽  
Deborah Paul ◽  
Roselyn Krupa ◽  
Cynthia Meirbachtol
Keyword(s):  
Cardiac Resynchronization Therapy ◽  
Right Ventricular ◽  
Right Bundle Branch Block ◽  
Left Ventricular ◽  
Cardiac Resynchronization ◽  
Qrs Complex ◽  
Resynchronization Therapy ◽  
Ventricular Performance ◽  
Bundle Branch Block ◽  
Qrs Duration

Background: Cardiac resynchronization therapy has been shown to improve left ventricular performance in patients with left ventricular dysfunction and a left-sided interventricular conduction delay. This is performed by placing a pacing lead on the lateral left ventricular wall to stimulate the area normally stimulated by the left bundle branch. In patients with right bundle branch block (RBBB), pacing the right bundle branch could also result in resynchronization. Previous studies have shown that right ventricular outflow septal (RVOS) pacing does, in fact, utilize the native conduction system. Methods: 62 consecutive patients, 46 male/16 female, aged 75 +/− 10.5 yr, with RBBB and indications for pacing, underwent RVOS lead placement using commercially available pacing systems. The patients subsequently underwent bedside A-V optimization to achieve the narrowest QRS duration and most “normal” QRS complex. Echocardiography was performed to evaluate changes in wall motion comparing baseline with optimal pacing. Results: Baseline mean QRS duration 146 +/− 20.9 ms Optimized mean QRS duration 111 +/− 20.5 ms Average decrease in QRS duration -35 +/− 21.5 ms p < 0.001 Echocardiography demonstrated improvement in septal contraction abnormalities. Conclusions: 1) RVOS pacing in RBBB patients can significantly narrow the QRS complex on ECG. 2) Septal contraction abnormalities due to RBBB can be improved with RVOS pacing and optimal A-V timing. 3) Further studies are warranted to evaluate this therapy in a heart failure population.

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