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Billette J, Tadros R. An integrated overview of AV node physiology. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2019; 42:805-820. [DOI: 10.1111/pace.13734] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 04/10/2019] [Accepted: 05/27/2019] [Indexed: 11/30/2022]
Affiliation(s)
- Jacques Billette
- Département de Physiologie, Faculté de MédecineUniversité de Montréal Montréal Canada
| | - Rafik Tadros
- Département de Physiologie, Faculté de MédecineUniversité de Montréal Montréal Canada
- Electrophysiology ServiceMontreal Heart Institute Montreal Canada
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Wallman M, Sandberg F. Characterisation of human AV-nodal properties using a network model. Med Biol Eng Comput 2017; 56:247-259. [DOI: 10.1007/s11517-017-1684-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 07/03/2017] [Indexed: 02/05/2023]
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Masè M, Disertori M, Marini M, Ravelli F. Characterization of rate and regularity of ventricular response during atrial tachyarrhythmias. Insight on atrial and nodal determinants. Physiol Meas 2017; 38:800-818. [DOI: 10.1088/1361-6579/aa6388] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Henriksson M, Corino VDA, Sornmo L, Sandberg F. A Statistical Atrioventricular Node Model Accounting for Pathway Switching During Atrial Fibrillation. IEEE Trans Biomed Eng 2016; 63:1842-1849. [DOI: 10.1109/tbme.2015.2503562] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Billette J, Tadros R. Does Electrode Design Matter in Ablation Effect Assessments? J Cardiovasc Electrophysiol 2016; 27:825-6. [PMID: 27198877 DOI: 10.1111/jce.13011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Accepted: 05/10/2016] [Indexed: 11/28/2022]
Affiliation(s)
- Jacques Billette
- Département de physiologie, Université de Montréal, Montreal, Canada
| | - Rafik Tadros
- Département de médecine, Faculté de médecine, Université de Montréal, Montreal, Canada.,Electrophysiology service, Montreal Heart Institute, Montreal, Canada
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Masè M, Marini M, Disertori M, Ravelli F. Dynamics of AV coupling during human atrial fibrillation: role of atrial rate. Am J Physiol Heart Circ Physiol 2015; 309:H198-205. [DOI: 10.1152/ajpheart.00726.2014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 04/21/2015] [Indexed: 11/22/2022]
Abstract
The causal relationship between atrial and ventricular activities during human atrial fibrillation (AF) is poorly understood. This study analyzed the effects of an increase in atrial rate on the link between atrial and ventricular activities during AF. Atrial and ventricular time series were determined in 14 patients during the spontaneous acceleration of the atrial rhythm at AF onset. The dynamic relationship between atrial and ventricular activities was quantified in terms of atrioventricular (AV) coupling by AV synchrogram analysis. The technique identified n: m coupling patterns ( n atrial beats in m ventricular cycles), quantifying their percentage, maximal length, and conduction ratio (= m/ n). Simulations with a difference-equation AV model were performed to correlate the observed dynamics to specific atrial/nodal properties. The atrial rate increase significantly affected AV coupling and ventricular response during AF. The shortening of atrial intervals from 185 ± 32 to 165 ± 24 ms ( P < 0.001) determined transitions toward AV patterns with progressively decreasing m/ n ratios (from conduction ratio = 0.34 ± 0.09 to 0.29 ± 0.08, P < 0.01), lower occurrence (from percentage of coupled beats = 27.1 ± 8.0 to 21.8 ± 6.9%, P < 0.05), and higher instability (from maximal length = 3.9 ± 1.5 to 2.8 ± 0.7 s, P < 0.01). Advanced levels of AV block and coupling instability at higher atrial rates were associated with increased ventricular interval variability (from 123 ± 52 to 133 ± 55 ms, P < 0.05). AV pattern transitions and coupling instability in patients were predicted, assuming the filtering of high-rate irregular atrial beats by the slow recovery of nodal excitability. These results support the role of atrial rate in determining AV coupling and ventricular response and may have implications for rate control in AF.
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Affiliation(s)
- M. Masè
- Department of Physics, University of Trento, Povo-Trento, Italy
| | - M. Marini
- Division of Cardiology, Santa Chiara Hospital, Trento, Italy; and
| | - M. Disertori
- Division of Cardiology, Santa Chiara Hospital, Trento, Italy; and
- Healthcare Research and Innovation Program, PAT-FBK, Trento, Italy
| | - F. Ravelli
- Department of Physics, University of Trento, Povo-Trento, Italy
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