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Atrial fibrillation nomenclature, definitions, and mechanisms: Position paper from the international Working Group of the Signal Summit.
de Groot NMS, Kleber A, Narayan SM, Ciaccio EJ, Doessel O, Bernus O, Berenfeld O, Callans D, Fedorov V, Hummel J, Haissaguerre M, Natale A, Trayanova N, Spector P, Vigmond E, Anter E. de Groot NMS, et al. Among authors: narayan sm. Heart Rhythm. 2025 Jun;22(6):1480-1491. doi: 10.1016/j.hrthm.2024.11.012. Epub 2024 Nov 17. Heart Rhythm. 2025. PMID: 39561931 Free PMC article. Review.
In 2023, the working group met in Reykjavik, Iceland, and laid the foundation for this manuscript. Atrial fibrillation (AF) is the most common arrhythmia in adults, with a rapidly increasing prevalence worldwide. ...First, whereas AF initiation usually begins with an ectop …
In 2023, the working group met in Reykjavik, Iceland, and laid the foundation for this manuscript. Atrial fibrillation (AF) is the mo …
Spatially Conserved Spiral Wave Activity During Human Atrial Fibrillation.
Rappel WJ, Baykaner T, Zaman J, Ganesan P, Rogers AJ, Narayan SM. Rappel WJ, et al. Among authors: narayan sm. Circ Arrhythm Electrophysiol. 2024 Mar;17(3):e012041. doi: 10.1161/CIRCEP.123.012041. Epub 2024 Feb 13. Circ Arrhythm Electrophysiol. 2024. PMID: 38348685 Free PMC article.
BACKGROUND: Atrial fibrillation is the most common cardiac arrhythmia in the world and increases the risk for stroke and morbidity. During atrial fibrillation, the electric activation fronts are no longer coherently propagating through the tissue and, instead …
BACKGROUND: Atrial fibrillation is the most common cardiac arrhythmia in the world and increases the risk for stroke and morbidity. D …
Termination of persistent atrial fibrillation by ablating sites that control large atrial areas.
Bhatia NK, Rogers AJ, Krummen DE, Hossainy S, Sauer W, Miller JM, Alhusseini MI, Peszek A, Armenia E, Baykaner T, Brachmann J, Turakhia MP, Clopton P, Wang PJ, Rappel WJ, Narayan SM. Bhatia NK, et al. Among authors: narayan sm. Europace. 2020 Jun 1;22(6):897-905. doi: 10.1093/europace/euaa018. Europace. 2020. PMID: 32243508 Free PMC article.
AIMS: Persistent atrial fibrillation (AF) has been explained by multiple mechanisms which, while they conflict, all agree that more disorganized AF is more difficult to treat than organized AF. ...METHODS AND RESULTS: We mapped vectorial propagation in persistent AF …
AIMS: Persistent atrial fibrillation (AF) has been explained by multiple mechanisms which, while they conflict, all agree that more d …
Wavefront Field Mapping Reveals a Physiologic Network Between Drivers Where Ablation Terminates Atrial Fibrillation.
Leef G, Shenasa F, Bhatia NK, Rogers AJ, Sauer W, Miller JM, Swerdlow M, Tamboli M, Alhusseini MI, Armenia E, Baykaner T, Brachmann J, Turakhia MP, Atienza F, Rappel WJ, Wang PJ, Narayan SM. Leef G, et al. Among authors: narayan sm. Circ Arrhythm Electrophysiol. 2019 Aug;12(8):e006835. doi: 10.1161/CIRCEP.118.006835. Epub 2019 Jul 29. Circ Arrhythm Electrophysiol. 2019. PMID: 31352796 Free PMC article.
BACKGROUND: Localized drivers are proposed mechanisms for persistent atrial fibrillation (AF) from optical mapping of human atria and clinical studies of AF, yet are controversial because drivers fluctuate and ablating them may not terminate AF. ...Future work shoul …
BACKGROUND: Localized drivers are proposed mechanisms for persistent atrial fibrillation (AF) from optical mapping of human atria …
Independent mapping methods reveal rotational activation near pulmonary veins where atrial fibrillation terminates before pulmonary vein isolation.
Navara R, Leef G, Shenasa F, Kowalewski C, Rogers AJ, Meckler G, Zaman JAB, Baykaner T, Park S, Turakhia MP, Zei P, Viswanathan M, Wang PJ, Narayan SM. Navara R, et al. Among authors: narayan sm. J Cardiovasc Electrophysiol. 2018 May;29(5):687-695. doi: 10.1111/jce.13446. Epub 2018 Feb 22. J Cardiovasc Electrophysiol. 2018. PMID: 29377478 Free PMC article.
OBJECTIVE: To investigate mechanisms by which atrial fibrillation (AF) may terminate during ablation near the pulmonary veins before the veins are isolated (PVI). ...RESULTS: In 22 patients (age 60.1 10.4, 36% persistent AF), ablation at sites near the PVs terminated AF (7 …
OBJECTIVE: To investigate mechanisms by which atrial fibrillation (AF) may terminate during ablation near the pulmonary veins before …
Determining conduction patterns on a sparse electrode grid: Implications for the analysis of clinical arrhythmias.
Vidmar D, Narayan SM, Krummen DE, Rappel WJ. Vidmar D, et al. Among authors: narayan sm. Phys Rev E. 2016 Nov;94(5-1):050401. doi: 10.1103/PhysRevE.94.050401. Epub 2016 Nov 9. Phys Rev E. 2016. PMID: 27967050 Free PMC article.
We present a general method of utilizing bioelectric recordings from a spatially sparse electrode grid to compute a dynamic vector field describing the underlying propagation of electrical activity. This vector field, termed the wave-front flow field, permits quantitative …
We present a general method of utilizing bioelectric recordings from a spatially sparse electrode grid to compute a dynamic vector field des …
Organized Sources Are Spatially Conserved in Recurrent Compared to Pre-Ablation Atrial Fibrillation: Further Evidence for Non-Random Electrical Substrates.
Lalani GG, Coysh T, Baykaner T, Zaman J, Hopper K, Schricker AA, Trikha R, Clopton P, Krummen DE, Narayan SM. Lalani GG, et al. Among authors: narayan sm. J Cardiovasc Electrophysiol. 2016 Jun;27(6):661-9. doi: 10.1111/jce.12964. Epub 2016 Apr 5. J Cardiovasc Electrophysiol. 2016. PMID: 26918971 Free PMC article.
INTRODUCTION: Recurrent atrial fibrillation (AF) after ablation is associated with reconnection of initially isolated pulmonary vein (PV) trigger sites. ...Overall, 81% (61/75) of AF sources lay in conserved regions, while 19% (14/75) were detected de novo. CONCLUSION: Ele …
INTRODUCTION: Recurrent atrial fibrillation (AF) after ablation is associated with reconnection of initially isolated pulmonary vein …
Mechanistically based mapping of human cardiac fibrillation.
Narayan SM, Zaman JA. Narayan SM, et al. J Physiol. 2016 May 1;594(9):2399-415. doi: 10.1113/JP270513. Epub 2016 Jan 19. J Physiol. 2016. PMID: 26607671 Free PMC article.
In his 1913 paper 'On dynamic equilibrium in the heart', Mines proposed that an activation wave front could propagate repeatedly in a circle, initiated by a stimulus in the vulnerable period. ...Notably, optical mapping of action potentials in atrial fibrilla …
In his 1913 paper 'On dynamic equilibrium in the heart', Mines proposed that an activation wave front could propagate repeated …
Stability of rotors and focal sources for human atrial fibrillation: focal impulse and rotor mapping (FIRM) of AF sources and fibrillatory conduction.
Swarup V, Baykaner T, Rostamian A, Daubert JP, Hummel J, Krummen DE, Trikha R, Miller JM, Tomassoni GF, Narayan SM. Swarup V, et al. Among authors: narayan sm. J Cardiovasc Electrophysiol. 2014 Dec;25(12):1284-92. doi: 10.1111/jce.12559. Epub 2014 Nov 11. J Cardiovasc Electrophysiol. 2014. PMID: 25263408
AF was phase mapped (RhythmView, Topera, Menlo Park, CA, USA). AF propagation movies were interpreted by each operator to assess the source stability/dynamics over tens of minutes before ablation. ...Each source lay in stable atrial regions for 4,196 6,360 cycles, w …
AF was phase mapped (RhythmView, Topera, Menlo Park, CA, USA). AF propagation movies were interpreted by each operator to assess the …
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