scholarly journals Adenosine-sensitive atrial tachycardia originating from the para-Hisian region with a slow conduction zone in the anteroseptal left atrium

2020 ◽  
Author(s):  
Satoshi Sakai ◽  
Akihiro Takitsume ◽  
Hiroyuki Kawata ◽  
Taku Nishida ◽  
Yoshihiko Saito
Keyword(s):  
Left Atrium ◽  
Atrial Tachycardia ◽  
Slow Conduction ◽  
Conduction Zone

Abstract 13669: Slow Conduction Zone of Left Atrium is a Precursor to Low Voltage Area in Patients With Atrial Fibrillation

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
Hideyuki Kishima ◽  
Takanao Mine ◽  
Ryo Kitagaki ◽  
Eiji Fukuhara ◽  
Masaharu Ishihara
Keyword(s):  
Atrial Fibrillation ◽  
Left Atrium ◽  
Low Voltage ◽  
Anterior Wall ◽  
Right Atrial ◽  
Wall Region ◽  
Contact Areas ◽  
Slow Conduction ◽  
Conduction Zone ◽  
Right Atrial Appendage

Introduction: The slow conduction zone (SCZ) in the left atrium (LA) has attracted attention as an arrhythmia substrate of atrial fibrillation (AF). However, the occurrence mechanism of SCZ remains unclear. Hypothesis: The SCZ is related to the low voltage area (LVA) or the LA anatomical contact areas (CoAs) with other organs in patients with AF. Methods: We studied 100 patients (49 non-paroxysmal AF, 66 males, 67.9 ± 9.9 years) who received catheter ablation for AF. High-density LA mapping during right atrial appendage pacing at a rate of 100 bpm after pulmonary vein isolation were constructed. Isochronal activation maps were created at 5-ms interval setting, and the SCZ was identified on the activation map by finding a site with isochronal crowding of ≥3 isochrones, which are calculated as ≤27 cm/s (Figure). The LVA was defined as the following; mild (<1.3 mV), moderate (<1.0 mV), and severe LVA (<0.5 mV). The CoAs (ascending aorta-anterior LA, descending aorta-posterior LA, and vertebrae-posterior LA) were assessed using computed tomography. Results: The SCZ was distributed linearly (Figure), and observed in 95 of 100 patients (95%). The SCZ was most frequently observed in the anterior wall region (77%). A longer SCZ was significantly associated with a larger LA size and a prevalence of non-PAF. The 51.2±36.2% of SCZ overlapped with mild LVA, 32.9±32.8% of SCZ with moderate LVA, and 14.6±22.0% of SCZ with severe LVA. In contrast, only 25.6±28.0 % of SCZ matched with the CoAs. Conclusion: The slow conduction zone reflects LA electrical remodeling and may be a precursor finding of the low voltage zone, not LA contact areas in patients with atrial fibrillation.

scholarly journals Adenosine-sensitive atrial tachycardia originating from the para-Hisian region with the entrance of a slow conduction zone at the noncoronary aortic sinus

2020 ◽  
Vol 6 (7) ◽  
pp. 448-452
Author(s):  
Satoshi Sakai ◽  
Hajime Fujimoto ◽  
Takehito Nakai ◽  
Naofumi Doi ◽  
Megumi Suzuki
Keyword(s):  
Atrial Tachycardia ◽  
Aortic Sinus ◽  
Slow Conduction ◽  
Conduction Zone

scholarly journals Verapamil-sensitive atrial tachycardia with a slow conduction zone near the noncoronary aortic sinus and His bundle

2017 ◽  
Vol 5 (10) ◽  
pp. 1623-1627
Author(s):  
Osamu Inaba ◽  
Yasutoshi Nagata ◽  
Yasuteru Yamauchi ◽  
Takamichi Miyamoto ◽  
Masahiko Goya ◽  
...  
Keyword(s):  
Atrial Tachycardia ◽  
Aortic Sinus ◽  
His Bundle ◽  
Slow Conduction ◽  
Conduction Zone

Characterization of Low Right Atrial Isthmus as the Slow Conduction Zone and Pharmacological Target in Typical Atrial Flutter

Circulation ◽  
1997 ◽  
Vol 96 (8) ◽  
pp. 2601-2611 ◽  
Author(s):  
Ching-Tai Tai ◽  
Shih-Ann Chen ◽  
Chern-En Chiang ◽  
Shih-Huang Lee ◽  
Kwo-Chang Ueng ◽  
...  
Keyword(s):  
Atrial Flutter ◽  
Right Atrial ◽  
Slow Conduction ◽  
Typical Atrial Flutter ◽  
Pharmacological Target ◽  
Conduction Zone

scholarly journals P1151Structural remodeling and conduction velocity dynamics in the human left atrium: relationship with reentrant mechanisms sustaining atrial tachycardia and atrial fibrillation

EP Europace ◽  
2018 ◽  
Vol 20 (suppl_1) ◽  
pp. i219-i219
Author(s):  
S Honarbakhsh ◽  
R J Schilling ◽  
M Orini ◽  
R Providencia ◽  
E Keating ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Left Atrium ◽  
Conduction Velocity ◽  
Atrial Tachycardia
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