Bachmann's bundle—The “wrinkled neck” of the aging atria?

2021 ◽  
Vol 32 (4) ◽  
pp. 913-915
Author(s):  
Anna Pfenniger
Keyword(s):  
Bachmann’S Bundle

scholarly journals Ultrastructure and Cytoarchitecture of Bachmann's Bundle in the Mammalian Heart

2009 ◽  
Vol 25 (1) ◽  
pp. 24-31
Author(s):  
Takeshi Yamaguchi ◽  
Shuang-Qin Yi ◽  
Shigenori Tanaka ◽  
Katsushige Ono ◽  
Tatsuo Shimada
Keyword(s):  
Mammalian Heart ◽  
Bachmann’S Bundle

Relation of canine atrial activation sequence to anatomic landmarks

1982 ◽  
Vol 242 (3) ◽  
pp. H421-H428 ◽  
Author(s):  
H. Hayashi ◽  
R. L. Lux ◽  
R. F. Wyatt ◽  
M. J. Burgess ◽  
J. A. Abildskov
Keyword(s):  
Fiber Direction ◽  
Entry And Exit ◽  
Activation Time ◽  
Anatomic Landmarks ◽  
Crista Terminalis ◽  
Bipolar Electrodes ◽  
First Derivative ◽  
Bachmann’S Bundle ◽  
Atrial Activation ◽  
Activation Sequence

Activation sequence in the atria was investigated in 35 dogs. The atria were studied as four regions, and activation sequence in one region was determined in each experiment. In each region 60 electrograms were recorded simultaneously from bipolar electrodes. The maximal first derivative of the electrograms was taken as activation time. Dried atrial specimens, which permitted identification of pectinate muscles, crista terminalis, and the axis of fiber direction, were prepared. Nonuniform activation was demonstrated with more rapid conduction over the long axis of fiber direction and in Bachmann's bundle, crista terminalis, and pectinate muscles. These regions of rapid conduction were the same during sinus rhythm and ectopic and retrograde activation. Findings confirm the presence of paths with relatively rapid conduction in the atria and demonstrate that these are related to gross anatomic features. Findings also demonstrate that the paths are accessible to activation from multiple sites rather than insulated conduction paths with limited sites for entry and exit of activation.

scholarly journals Termination of atrial fibrillation during pharmacological cardioversion in the goat requires inter-atrial synchronisation of conduction

EP Europace ◽  
2021 ◽  
Vol 23 (Supplement_3) ◽  
Author(s):  
V Sobota ◽  
A Van Hunnik ◽  
S Zeemering ◽  
G Gatta ◽  
D Opacic ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Sinus Rhythm ◽  
Left Atrium ◽  
Conduction Velocity ◽  
Right Atrium ◽  
Path Length ◽  
Cycle Length ◽  
Final Phase ◽  
Periodic Activity ◽  
Bachmann’S Bundle

Abstract Funding Acknowledgements Type of funding sources: Public grant(s) – EU funding. Main funding source(s): ITN Networks PersonalizeAF: Personalized Therapies for Atrial Fibrillation. A Translational Approach, No. 860974; CATCH ME: Characterizing Atrial fibrillation by Translating its Causes into Health Modifiers in the Elderly, No. 633196; MAESTRIA: Machine Learning and Artificial Intelligence for Early Detection of Stroke and Atrial Fibrillation, No. 965286; AFib-TrainNet: EU Training Network on Novel Targets and Methods in Atrial Fibrillation, No. 675351 Netherlands Heart Foundation: CVON2014-09, RACE V Reappraisal of Atrial Fibrillation: Interaction between hyperCoagulability, Electrical remodeling, and Vascular Destabilization in the Progression of Atrial Fibrillation Background Few studies report on mechanisms leading to termination of atrial fibrillation (AF). Purpose To characterise electrophysiological parameters and conduction patterns during the transition from AF to sinus rhythm under various conditions of AF termination. Methods A retrospective evaluation of 6 goat studies was performed. AF was maintained for 3-4 weeks in 29 animals. Four animals were in SR. Unipolar electrograms were acquired with one 249-electrode array/atrium. Pharmacological termination of AF was evoked by various drugs; AP14145 (n = 5), PA6 (n = 7), XAF-1407 (n = 9) vernakalant (n = 8). In animals with sinus rhythm, AF was acutely induced and terminated spontaneously. Baseline AF and ≤3 recordings of the last 10 seconds preceding AF termination were analysed. Intervals with temporal continuous and periodic activity were distinguished in the recordings. AF cycle length (AFCL), conduction velocity and path length were determined for each interval. Results In total, 85 AF terminations were recorded. Switches between temporal continuous and periodic activity were seen frequently during AF. However, termination of AF was always preceded by a phase of periodic activity (PA). The final phase of PA persisted for a median number of 21 [IQR 10-28] cycles in the left atrium and somewhat shorter in the right atrium, Table 1. This final phase of PA was accompanied by a profound bi-atrial increase of AFCL, conduction velocity and path length and a disappearance of inter-atrial cycle length differences. Equipotent changes were not observed in the preceding PAs. During the final AF beats, the number of wave fronts were low, 1 or 2. Interestingly, 92% of the patterns during the last beats of AF involved the Bachmann’s bundle as main source of atrial conduction. Conclusion AF termination is preceded by an increased organisation of fibrillatory conduction, associated with abrupt prolongation of the path length. Propagation in atrial free walls regularly originated from the Bachmann’s bundle. These findings suggest that AF termination was not a random process but follows common spatiotemporal patterns. Final period of temporal organisation Left atrium Right atrium Final PA start Final PA end Final PA start Final PA end Af cycle length (ms) 163 ± 37 204 ± 50* 146 ± 44 207 ± 49* Conduction velocity (cm/s) 77 ± 15 96 ± 25* 83 ± 20 103 ± 24* Path Length (cm) 12.2 ± 2.7 19.3 ± 6.3* 12.0 ± 4.1 21.2 ± 6.4* Length of final periodic activity (beats) NA 21 [IQR 10-28] NA 15 [IQR 10- 25] Electrophysiological changes during the final period periodic activity (PA). Wilcoxon signed rank test. *p <0.05NA= not available

Bachmann's Bundle and Coronary Sinus Ostial Pacing Accentuate Left Atrial Electrical Dyssynchrony in an Acute Canine Model

2014 ◽  
Vol 25 (12) ◽  
pp. 1400-1406
Author(s):  
INDRAJIT CHOUDHURI ◽  
DAVID KRUM ◽  
ANUJ AGARWAL ◽  
JOHN HARE ◽  
MAREK BELOHLAVEK ◽  
...  
Keyword(s):  
Coronary Sinus ◽  
Left Atrial ◽  
Canine Model ◽  
Bachmann’S Bundle

scholarly journals Bayés’ Syndrome—A Comprehensive Short Review

Medicina ◽  
2020 ◽  
Vol 56 (8) ◽  
pp. 410
Author(s):  
Emma Murariu ◽  
Attila Frigy
Keyword(s):  
Conduction Block ◽  
Short Review ◽  
P Wave ◽  
Clinical Implications ◽  
Wave Analysis ◽  
Primary And Secondary Prevention ◽  
Important Data ◽  
Increased Risk ◽  
Bachmann’S Bundle ◽  
Interatrial Conduction

Prediction and early detection of atrial fibrillation (AF) remain a permanent challenge in everyday practice. Timely identification of an increased risk for AF episodes (which are frequently asymptomatic) is essential in the primary and secondary prevention of cardioembolic events. One of the noninvasive modalities of AF prediction is represented by the electrocardiographic P-wave analysis. This includes the study and diagnosis of interatrial conduction block (Bachmann’s bundle block). Bayés’ Syndrome (named after its first descriptor) denotes the association between interatrial conduction defect and supraventricular arrhythmias (mainly AF) predisposing to cardioembolic events. Our short review presents an update of the most important data concerning this syndrome: brief history, main ECG features, pathophysiological background and clinical implications.

scholarly journals Effect of bachmann's bundle pacing on atrial fibrillation: Electrophysiologic assessment

2004 ◽  
Vol 27 (1) ◽  
pp. 50-53 ◽  
Author(s):  
A. John Camm ◽  
Koichiro Kumagai ◽  
Hideaki Tojo ◽  
Tomoo Yasuda ◽  
Keijiro Saku
Keyword(s):  
Atrial Fibrillation ◽  
Bachmann’S Bundle

scholarly journals The Effects of Valvular Heart Disease on Atrial Conduction During Sinus Rhythm

2019 ◽  
Vol 13 (4) ◽  
pp. 632-639 ◽  
Author(s):  
Lisette J. M. E. van der Does ◽  
Eva A. H. Lanters ◽  
Christophe P. Teuwen ◽  
Elisabeth M. J. P. Mouws ◽  
Ameeta Yaksh ◽  
...  
Keyword(s):  
Sinus Rhythm ◽  
Left Atrium ◽  
Conduction Delay ◽  
Atrial Remodeling ◽  
Strongly Correlated ◽  
Maximal Degree ◽  
Conduction Disorders ◽  
History Of ◽  
Bachmann’S Bundle ◽  
Unipolar Electrogram

AbstractDifferent arrhythmogenic substrates for atrial fibrillation (AF) may underlie aortic valve (AV) and mitral valve (MV) disease. We located conduction disorders during sinus rhythm by high-resolution epicardial mapping in patients undergoing AV (n = 85) or MV (n = 54) surgery. Extent and distribution of conduction delay (CD) and block (CD) across the entire right and left atrial surface was determined from circa 1880 unipolar electrogram recordings per patient. CD and CB were most pronounced at the superior intercaval area (2.5% of surface, maximal degree 6.6%/cm2). MV patients had a higher maximal degree of CD at the lateral left atrium than AV patients (4.2 vs 2.3%/cm2, p = 0.001). A history of AF was most strongly correlated to CD/CB at Bachmann’s bundle and age. Although MV patients have more conduction disorders at the lateral left atrium, disturbed conduction at Bachmann’s bundle during sinus rhythm indicates the presence of atrial remodeling which is related to AF episodes.

scholarly journals A simple method for Bachmann's bundle pacing with indigenous modification of J-stylet

2016 ◽  
Vol 68 (5) ◽  
pp. 678-684
Author(s):  
Asit Das ◽  
Suvro Banerjee ◽  
S.C. Mandal
Keyword(s):  
Simple Method ◽  
Bachmann’S Bundle
Sign in / Sign up

Export Citation Format

Share Document