Study of prognostic significance of bundle branch blocks in acute coronary syndrome

2019 ◽  
Vol 12 (3) ◽  
pp. 96-99
Author(s):  
P T Gajbhare ◽  
◽  
Abhishek Agarwal ◽  
Milind Karade ◽  
◽  
...  
Keyword(s):  
Acute Coronary Syndrome ◽  
Prognostic Significance ◽  
Coronary Syndrome ◽  
Bundle Branch Blocks

scholarly journals Anatomical localization and classification of bundle branch blocks using novel CineECG

EP Europace ◽  
2021 ◽  
Vol 23 (Supplement_3) ◽  
Author(s):  
MJ Boonstra ◽  
BN Hilderink ◽  
ET Locati ◽  
FW Asselbergs ◽  
P Loh ◽  
...  
Keyword(s):  
Time Interval ◽  
Heart Model ◽  
National Budget ◽  
Funding Sources ◽  
Conduction Disorders ◽  
Bundle Branch Blocks ◽  
Anatomical Localization ◽  
The Mean ◽  
Diagnostic Work ◽  
Public Grant

Abstract Funding Acknowledgements Type of funding sources: Public grant(s) – National budget only. Main funding source(s): This work was supported by the Dutch Heart Foundation Background Ventricular conduction disorders can induce arrhythmias and impair cardiac function. Bundle branch blocks are diagnosed by 12-lead ECG, but discrimination between complete bundle branch blocks, incomplete bundle branch blocks and normal tracings can be challenging. CineECG computes the mean temporo-spatial isochrone (mTSI) trajectory of activation waveforms in a 3D-heart model from 12-lead ECGs. This trajectory represents the mean trajectory of the ventricular electrical activation at any time interval directly related to ventricular anatomy. In Brugada patients, CineECG has localized the terminal components of ventricular depolarization to right ventricle outflow tract (RVOT). Also, for the localization of bundle branch blocks, the region of latest activation contains the most information. Using CineECG, subject specific anatomically related information about the location of bundle branch blocks is obtained. Purpose This study aimed at exploring whether CineECG can improve the discrimination between complete left/right bundle branch blocks (LBBB/RBBB), and incomplete RBBB (iRBBB). Methods We utilized 400 12-lead ECGs from the online Physionet-XL-PTB-Diagnostic ECG Database with a certified ECG diagnosis. The mTSI trajectory was calculated and projected into the anatomical 3D-heart model. Five CineECG classes were established: "Normal", "iRBBB", "RBBB", "LBBB" and "Undetermined", to which each tracing was allocated. We determined the accuracy of CineECG classification with the gold standard diagnosis. Results A total of 391 ECGs were analyzed (9 ECGs were excluded for noise) and 240/266 were correctly classified as "normal", 14/17 as "iRBBB", 55/55 as "RBBB", 51/51 as "LBBB" and 31 as "undetermined". Average mTSI trajectories were calculated according to ECG diagnosis (Figure). The terminal mTSI contained most information about the BBB localization, as that part directs to the site of latest activation (Figure, red arrow). Conclusion CineECG provided the anatomical localization of different BBBs and accurately differentiated between normal, LBBB and RBBB, and iRBBB. CineECG may aid clinical diagnostic work-up, potentially also contributing to the difficult discrimination between normal, iRBBB and Brugada patients. Abstract Figure. Average CineECG trajectories

scholarly journals LONG TERM MORTALITY RATES OF U.S. VETERANS WITH BUNDLE BRANCH BLOCKS PRESENTING FOR CORONARY ANGIOGRAPHY

2017 ◽  
Vol 69 (11) ◽  
pp. 137
Author(s):  
Ajay Agarwal ◽  
Amish Patel ◽  
Jonathan Pollock ◽  
Samuel Roberto ◽  
Thein Aung ◽  
...  
Keyword(s):  
Coronary Angiography ◽  
Mortality Rates ◽  
Bundle Branch Blocks ◽  
Long Term Mortality

Evaluation of Conduction Disorders after Aortic Valve Replacement with Rapid Deployment Bioprostheses

2018 ◽  
Vol 13 (5) ◽  
pp. 356-360
Author(s):  
Augusto D'Onofrio ◽  
Lorenzo Bagozzi ◽  
Chiara Tessari ◽  
Annalisa Francescato ◽  
Giorgia Cibin ◽  
...  
Keyword(s):  
Left Bundle Branch Block ◽  
Pacemaker Implantation ◽  
Bundle Branch Block ◽  
End Point ◽  
Conduction Disorders ◽  
Single Center Study ◽  
Bundle Branch Blocks ◽  
Qrs Duration ◽  
Rapid Deployment ◽  
New Onset

Objective The aim of this retrospective, single-center study was to evaluate the occurrence of conduction disorders after rapid deployment aortic bioprosthesis implantation. Methods Electrocardiograms of patients undergoing INTUITY (Edwards Lifesciences, Irvine, CA USA) bioprosthesis implantation were collected at admission, during postoperative course, and at discharge. Primary end point was the occurrence of new-onset conduction disorders, defined as complete left bundle branch block, complete right bundle branch block, permanent pacemaker implantation, and worsening of pre-existing rhythm abnormalities. Secondary end points were the assessment of preoperative and postoperative QRS duration and the identification of transitory conduction disorders. Results Forty-four patients (July 2015–December 2016) were included in the analysis. Preoperatively, patients with normal conduction and with already existing disorders were 25 (56.8%) and 19 (43.2%), respectively. Primary end point occurred in 14 patients (31.8%). Two patients (4.5%) received pacemaker implantation. In patients with normal preoperative conduction, new abnormalities were found in eight cases (32%): all left bundle branch blocks with one pacemaker implantation. Worsening of pre-existing conduction disorders was found in six patients (31.6%) with one pacemaker implantation. QRS duration increased in 20 patients (45.4%), and average increase was 37 milliseconds. Overall, we observed a significant increase of QRS (96 ± 21 milliseconds vs. 111 ± 28 milliseconds, P < 0.001). Three patients experienced a new-onset temporary left bundle branch block. Conclusions New-onset conduction disorders or worsening of pre-existing rhythm abnormalities occur in one third of patients after rapid deployment aortic bioprosthesis implantation. Although the incidence of postoperative pacemaker implantation before discharge is low, strict follow-up is mandatory to identify a potential need for pacemaker implantation in a timely manner.

scholarly journals Effects of isoproterenol on bradycardia-dependent intra-His and left bundle branch blocks.

Circulation ◽  
1981 ◽  
Vol 64 (2) ◽  
pp. 427-433 ◽  
Author(s):  
L D Suárez ◽  
A Kretz ◽  
J A Alvarez ◽  
J M Martinez ◽  
A M Perosio
Keyword(s):  
Bundle Branch Blocks
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