scholarly journals Behavior of AV synchrony pacing mode in a leadless pacemaker during variable AV conduction and arrhythmias

2021 ◽  
Author(s):  
Christophe Garweg ◽  
Surinder Kaur Khelae ◽  
Joseph Yat Sun Chan ◽  
Larry Chinitz ◽  
Philippe Ritter ◽  
...  
Keyword(s):  
Leadless Pacemaker ◽  
Av Conduction ◽  
Pacing Mode ◽  
Av Synchrony

Effect of a Pacing Mode Preserving Spontaneous AV Conduction on Ventricular Pacing Burden and Atrial Arrhythmias

2012 ◽  
Vol 35 (5) ◽  
pp. 580-585 ◽  
Author(s):  
JEAN-LUC REY ◽  
SERGE QUENUM ◽  
MARC HERO
Keyword(s):  
Atrial Arrhythmias ◽  
Ventricular Pacing ◽  
Av Conduction ◽  
Pacing Mode

scholarly journals B-PO01-024 MECHANICAL AV SYNCHRONY PROVIDED BY A LEADLESS PACEMAKER SUCCESSFULLY TIMES VENTRICULAR ACTIVATION TO THE COMPLETION OF ATRIAL CONTRACTION

Heart Rhythm ◽  
2021 ◽  
Vol 18 (8) ◽  
pp. S60
Author(s):  
Alan Cheng ◽  
Larry A. Chinitz ◽  
Surinder Kaur Khelae ◽  
Clemens Steinwender ◽  
Todd J. Sheldon ◽  
...  
Keyword(s):  
Leadless Pacemaker ◽  
Atrial Contraction ◽  
Ventricular Activation ◽  
Av Synchrony

Non-physiological increase of AV conduction time in sinus disease patients programmed in AAIR-based pacing mode

2012 ◽  
Vol 35 (2) ◽  
pp. 219-226 ◽  
Author(s):  
Philippe Mabo ◽  
Jean-Pierre Cebron ◽  
Aude Solnon ◽  
Aude Tassin ◽  
Laurence Graindorge ◽  
...  
Keyword(s):  
Conduction Time ◽  
Sinus Disease ◽  
Av Conduction ◽  
Pacing Mode

scholarly journals An electrographic AV optimization for the maximum integrative atrioventricular and ventricular resynchronization in CRT

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Jie Li ◽  
Yuegang Wang ◽  
Jingting Mai ◽  
Shilan Chen ◽  
Menghui Liu ◽  
...  
Keyword(s):  
Cardiac Resynchronization ◽  
Conduction Time ◽  
Activation Time ◽  
Velocity Time Integral ◽  
Time Integral ◽  
Ventricular Synchrony ◽  
Av Conduction ◽  
Atrial Activation ◽  
Av Synchrony ◽  
Av Delay

Abstract Background Atrioventricular (AV) delay could affect AV and ventricular synchrony in cardiac resynchronization therapy (CRT). Strategies to optimize AV delay according to optimal AV synchrony (AVopt-AV) or ventricular synchrony (AVopt-V) would potentially be discordant. This study aimed to explore a new AV delay optimization algorithm guided by electrograms to obtain the maximum integrative effects of AV and ventricular resynchronization (opt-AV). Methods Forty-nine patients with CRT were enrolled. AVopt-AV was measured through the Ritter method. AVopt-V was obtained by yielding the narrowest QRS. The opt-AV was considered to be AVopt-AV or AVopt-V when their difference was < 20 ms, and to be the AV delay with the maximal aortic velocity–time integral between AVopt-AV and AVopt-V when their difference was > 20 ms. Results The results showed that sensing/pacing AVopt-AV (SAVopt-AV/PAVopt-AV) were correlated with atrial activation time (Pend-As/Pend-Ap) (P < 0.05). Sensing/pacing AVopt-V (SAVopt-V/PAVopt-V) was correlated with the intrinsic AV conduction time (As-Vs/Ap-Vs) (P < 0.01). The percentages of patients with more than 20 ms differences between SAVopt-AV/PAVopt-AV and SAVopt-V/PAVopt-V were 62.9% and 57.1%, respectively. Among them, opt-AV was linearly correlated with SAVopt-AV/PAVopt-AV and SAVopt-V/PAVopt-V. The sensing opt-AV (opt-SAV) = 0.1 × SAVopt-AV + 0.4 × SAVopt-V + 70 ms (R2 = 0.665, P < 0.01) and the pacing opt-AV (opt-PAV) = 0.25 × PAVopt-AV + 0.5 × PAVopt-V + 30 ms (R2 = 0.560, P < 0.01). Conclusion The SAVopt-AV/PAVopt-AV and SAVopt-V/PAVopt-V were correlated with the atrial activation time and the intrinsic AV conduction interval respectively. Almost half of the patients had a > 20 ms difference between SAVopt-AV/PAVopt-AV and SAVopt-V/PAVopt-V. The opt-AV could be estimated based on electrogram parameters.

238 Effect of pacing mode preserving spontaneous AV conduction on ventricular pacing burden and atrial arrhythmias

2012 ◽  
Vol 4 (1) ◽  
pp. 75-76
Author(s):  
Jean-Luc Rey ◽  
Serge Quenum ◽  
Marc Hero
Keyword(s):  
Atrial Arrhythmias ◽  
Ventricular Pacing ◽  
Av Conduction ◽  
Pacing Mode

scholarly journals An electrographic AV optimization for the maximum integrative atrioventricular and ventricular resynchronization in CRT

2021 ◽  
Author(s):  
JIE LI ◽  
Yuegang Wang ◽  
Jingting Mai ◽  
Shilan Chen ◽  
Menghui Liu ◽  
...  
Keyword(s):  
Cardiac Resynchronization ◽  
Conduction Time ◽  
Activation Time ◽  
Velocity Time Integral ◽  
Time Integral ◽  
Ventricular Synchrony ◽  
Av Conduction ◽  
Atrial Activation ◽  
Av Synchrony ◽  
Av Delay

Abstract Background:Atrioventricular (AV) delay could affect AV and ventricular synchrony in cardiac resynchronization therapy (CRT). Strategies to optimize AV delay according to optimal AV synchrony (AVopt-AV) or ventricular synchrony (AVopt-V) would potentially be in discordant. This study aimed to explore a new AV delay optimization algorithm guided by electrograms to get the maximum integrative effects of AV and ventricular resynchronization (opt-AV).Methods:Forty-nine patients with CRT were enrolled. AVopt-AV was measured through the Ritter method. AVopt-V was obtained by yielding the narrowest QRS. The opt-AV was considered to be AVopt-AV or AVopt-V when their difference was <20ms, and to be the AV delay with the maximal aortic velocity-time integral between AVopt-AV and AVopt-V when their difference was >20ms.Results:The results showed sensing/pacing AVopt-AV (SAVopt-AV/PAVopt-AV) were correlated with atrial activation time (Pend-As/ Pend-Ap)( P＜0.05 ). Sensing/pacing AVopt-V (SAVopt-V/PAVopt-V) were correlated with the intrinsic AV conduction time (As-Vs/Ap-Vs) (P＜0.01). The percentages of patients with more than 20ms differences between SAVopt-AV/PAVopt-AV and SAVopt-V/PAVopt-V were 62.9% and 57.1%, respectively. Among them, the opt-AV were linearly correlated with SAVopt-AV/PAVopt-AV and SAVopt-V/PAVopt-V. The sensing opt-AV (opt-SAV)=0.1×SAVopt-AV+0.4×SAVopt-V+70ms (R2=0.665, P<0.01) and the pacing opt-AV (opt-PAV)=0.25×PAVopt-AV+0.5×PAVopt-V+30ms (R2=0.560, P<0.01).Conclusion:The SAVopt-AV/PAVopt-AV and SAVopt-V/PAVopt-V were correlated with the atrial activation time and the intrinsic AV conduction interval respectively. Almost half of patients had a >20ms difference between SAVopt-AV/PAVopt-AV and SAVopt-V/PAVopt-V. The opt-AV could be estimated based on electrogram parameters.

scholarly journals A Real-world Experience of Atrioventricular Synchronous Pacing with Leadless Ventricular Pacemakers

2021 ◽  
Author(s):  
Gurukripa Kowlgi ◽  
Andrew Tseng ◽  
Nathan Tempel ◽  
Mark Henrich ◽  
Kalpathi Venkatachalam ◽  
...  
Keyword(s):  
Real World ◽  
Medical Records ◽  
Demographic Data ◽  
Active Device ◽  
Leadless Pacemaker ◽  
Echocardiographic Parameters ◽  
Av Synchrony ◽  
Clinical Worsening ◽  
Atrial Sensing

Aims: The MicraTM transcatheter pacing system (TPS) (Medtronic) is the only leadless pacemaker that promotes atrioventricular (AV) synchrony via accelerometer-based atrial sensing. Data regarding the real-world experience with this novel system are currently lacking. We sought to characterize patients undergoing MicraTM -AV implants, describe percentage AV synchrony achieved, and analyze the causes for suboptimal AV synchrony. Methods: In this retrospective cohort study, electronic medical records from 56 consecutive patients undergoing MicraTM -AV implants at the Mayo Clinic sites in Minnesota, Florida, and Arizona with a minimum follow-up of 3 months were reviewed. Demographic data, comorbidities, echocardiographic data, and clinical outcomes were compared among patients with and without atrial synchronous-ventricular pacing (AsVP) ≥70%. Results: Fifty-six percent of patients achieved AsVP ≥70%. Patients with adequate AsVP had smaller body mass indices, a lower proportion of congestive heart failure and pulmonary hypertension. Echocardiographic parameters and procedural characteristics were similar across the two groups. Active device troubleshooting was associated with higher AsVP. The likely reasons for low AsVP were persistent atrial arrhythmias, small A4-wave amplitude, and inadequate device reprogramming. Importantly, in patients with low AsVP, subjective clinical worsening was not noted during follow-up. Conclusion: With the increasing popularity of leadless PM, it is paramount for device implanting teams to be familiar with common predictors of AV synchrony and troubleshooting with MicraTM -AV devices.

77 Pacing mode influences exercise parameters in patients with implanted cardioverter defibrillators and impaired but not with preserved systolic function

2006 ◽  
Vol 5 (1) ◽  
pp. 15-16
Author(s):  
M WONISCH ◽  
P LERCHER ◽  
D SCHERR ◽  
W KRAXNER ◽  
R MAIER ◽  
...  
Keyword(s):  
Systolic Function ◽  
Pacing Mode ◽  
Cardioverter Defibrillators

Development of an Atrioventricular (AV) conduction block in the rat- investigation tool for effects of heart failure

2013 ◽  
Vol 61 (S 01) ◽  
Author(s):  
S Pecha ◽  
F Weinberger ◽  
Y Yildirim ◽  
B Sill ◽  
L Conradi ◽  
...  
Keyword(s):  
Heart Failure ◽  
Conduction Block ◽  
Av Conduction ◽  
Av Conduction Block
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