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Sousa PA, Barra S, Saleiro C, Khoueiry Z, Adão L, Primo J, Lagrange P, Lebreiro A, Fonseca P, Pereira M, Puga L, Oliveiros B, Elvas L, Gonçalves L. Ostial vs. wide area circumferential ablation guided by the Ablation Index in paroxysmal atrial fibrillation. Europace 2023; 25:euad160. [PMID: 37345859 PMCID: PMC10286571 DOI: 10.1093/europace/euad160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 05/23/2023] [Indexed: 06/23/2023] Open
Abstract
AIMS Pulmonary vein isolation (PVI) guided by the Ablation Index (AI) has shown high acute and mid-term efficacy in the treatment of paroxysmal atrial fibrillation (AF). Previous data before the AI-era had suggested that wide-area circumferential ablation (WACA) was preferable to ostial ablation. However, with the use of AI, we hypothesize that ostial circumferential ablation is non-inferior to WACA and can improve outcomes in paroxysmal AF. METHODS AND RESULTS Prospective, multicentre, non-randomized, non-inferiority study of consecutive patients were referred for paroxysmal AF ablation from January 2020 to September 2021. All procedures were performed using the AI software, and patients were separated into two different groups: WACA vs. ostial circumferential ablation. Acute reconnection, procedural data, and 1-year arrhythmia recurrence were assessed. During the enrolment period, 162 patients (64% males, mean age of 60 ± 11 years) fulfilled the study inclusion criteria-81 patients [304 pulmonary vein (PV)] in the WACA group and 81 patients (301 PV) in the ostial group. Acute PV reconnection was identified in 7.9% [95% confidence interval (CI), 4.9-11.1%] of PVs in the WACA group compared with 3.3% (95% CI, 1.8-6.1%) of PVs in the ostial group [P < 0.001 for non-inferiority; adjusted odds ratio 0.51 (95% CI, 0.23-0.83), P = 0.05]. Patients in the WACA group had longer ablation (35 vs. 29 min, P = 0.001) and procedure (121 vs. 102 min, P < 0.001) times. No significant difference in arrhythmia recurrence was seen at 1-year of follow-up [11.1% in WACA vs. 9.9% in ostial, hazard ratio 1.13 (95% CI, 0.44-1.94), P = 0.80 for superiority]. CONCLUSION In paroxysmal AF patients treated with tailored AI-guided PVI, ostial circumferential ablation is not inferior to WACA with regard to acute PV reconnection, while allowing quicker procedures with less ablation time.
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Affiliation(s)
- Pedro A Sousa
- Pacing and Electrophysiology Unit, Department of Cardiology, Coimbra’s Hospital and University Center, Morada: Praceta Prof Mota Pinto, Coimbra 3000-075, Portugal
| | - Sérgio Barra
- Department of Cardiology, Hospital da Luz Arrábida, V. N. Gaia, Portugal
| | - Carolina Saleiro
- Pacing and Electrophysiology Unit, Department of Cardiology, Coimbra’s Hospital and University Center, Morada: Praceta Prof Mota Pinto, Coimbra 3000-075, Portugal
| | - Ziad Khoueiry
- Department of Cardiology, Clinique Saint Pierre, Perpignan, France
| | - Luís Adão
- Department of Cardiology, University Hospital Center of São João, Porto, Portugal
| | - João Primo
- Department of Cardiology, Vila Nova de Gaia and Espinho Hospital Center, V. N. Gaia, Portugal
| | | | - Ana Lebreiro
- Department of Cardiology, University Hospital Center of São João, Porto, Portugal
| | - Paulo Fonseca
- Department of Cardiology, Vila Nova de Gaia and Espinho Hospital Center, V. N. Gaia, Portugal
| | | | - Luís Puga
- Pacing and Electrophysiology Unit, Department of Cardiology, Coimbra’s Hospital and University Center, Morada: Praceta Prof Mota Pinto, Coimbra 3000-075, Portugal
| | | | - Luís Elvas
- Pacing and Electrophysiology Unit, Department of Cardiology, Coimbra’s Hospital and University Center, Morada: Praceta Prof Mota Pinto, Coimbra 3000-075, Portugal
| | - Lino Gonçalves
- Pacing and Electrophysiology Unit, Department of Cardiology, Coimbra’s Hospital and University Center, Morada: Praceta Prof Mota Pinto, Coimbra 3000-075, Portugal
- ICBR, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Sousa PA, Barra S, Cortez-Dias N, Khoueiry Z, Paulo J, António N, Ferreira A, Pereira M, Lagrange P, de Sousa J, Elvas L, Garcia FC, Gonçalves L. Multielectrode mapping for premature ventricular contraction ablation - A prospective, multicenter study. Int J Cardiol 2023:S0167-5273(23)00598-3. [PMID: 37116756 DOI: 10.1016/j.ijcard.2023.04.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/01/2023] [Accepted: 04/23/2023] [Indexed: 04/30/2023]
Abstract
PURPOSE We aim to evaluate whether the use of a multielectrode mapping catheter could lead to higher efficacy of premature ventricular contraction (PVC) ablation. METHODS Prospective, multicenter nonrandomized study of consecutive patients referred for PVC ablation from January 2018 to June 2021. Patients were separated into two groups: activation map performed with the PentaRay catheter (Study group) or with the ablation catheter (Control group). PMF software was used in both groups. Procedural endpoints and 1-year freedom from ventricular arrhythmia were assessed. RESULTS During the enrollment period 136 patients (60% males, mean age of 55 ± 17 years, 60% left-sided origin) fulfilled the inclusion criteria - 68 patients in each group. Patients in the Study Group had a sevenfold higher number of acquired activation points (768 ± 728 vs. 110 ± 79, p < 0.01), a shorter mapping time (28 ± 19 min vs. 49 ± 32 min, p < 0.01) and a quicker procedure time (110 ± 33 min vs. 134 ± 50 min, p < 0.01), compared to patients in the Control Group. While there were no significant differences in the acute success (95.6% in the Study Group vs. 90.1% in Control group, p = 0.49), or adverse events (4% in the Study group vs. 7% in the Control group, p = 0.72), patients in the Study group had a higher freedom from ventricular arrhythmia at 1-year (89.7% vs. 70.6%, p = 0.01). The use of the PentaRay catheter was an independent predictor of success (HR = 6.20 [95% CI, 1.08-35.47], p = 0.003). CONCLUSIONS The use of the PentaRay catheter may improve the outcome of PVC ablation while reducing procedure time.
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Affiliation(s)
- Pedro A Sousa
- Pacing & Electrophysiology Unit, Cardiology Department, Coimbra's Hospital and University Center, Coimbra, Portugal.
| | - Sérgio Barra
- Cardiology Department, Hospital da Luz Arrábida, V. N. Gaia, Portugal
| | - Nuno Cortez-Dias
- Arrhythmia Unit, Cardiology Department, Santa Maria University Hospital, Lisbon Academic Medical Center, Lisbon, Portugal
| | - Ziad Khoueiry
- Cardiology Department, Clinique Saint Pierre, Perpignan, France
| | - José Paulo
- Pacing & Electrophysiology Unit, Cardiology Department, Coimbra's Hospital and University Center, Coimbra, Portugal
| | - Natália António
- Pacing & Electrophysiology Unit, Cardiology Department, Coimbra's Hospital and University Center, Coimbra, Portugal; ICBR, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Afonso Ferreira
- Arrhythmia Unit, Cardiology Department, Santa Maria University Hospital, Lisbon Academic Medical Center, Lisbon, Portugal
| | | | | | - Joao de Sousa
- Arrhythmia Unit, Cardiology Department, Santa Maria University Hospital, Lisbon Academic Medical Center, Lisbon, Portugal
| | - Luís Elvas
- Pacing & Electrophysiology Unit, Cardiology Department, Coimbra's Hospital and University Center, Coimbra, Portugal
| | - Fermin C Garcia
- Section of Cardiac Electrophysiology, Department of Medicine, Hospital of the University of Pennsylvania, Philadelphia, USA
| | - Lino Gonçalves
- Pacing & Electrophysiology Unit, Cardiology Department, Coimbra's Hospital and University Center, Coimbra, Portugal; ICBR, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Benali K, Barré V, Hermida A, Galand V, Milhem A, Philibert S, Boveda S, Bars C, Anselme F, Maille B, André C, Behaghel A, Moubarak G, Clémenty N, Da Costa A, Arnaud M, Venier S, Sebag F, Jésel-Morel L, Sagnard A, Champ-Rigot L, Dang D, Guy-Moyat B, Abbey S, Garcia R, Césari O, Badenco N, Lepillier A, Ninni S, Boulé S, Maury P, Algalarrondo V, Bakouboula B, Mansourati J, Lesaffre F, Lagrange P, Bouzeman A, Muresan L, Bacquelin R, Bortone A, Bun SS, Pavin D, Macle L, Martins RP. Recurrences of Atrial Fibrillation Despite Durable Pulmonary Vein Isolation: The PARTY-PVI Study. Circ Arrhythm Electrophysiol 2023; 16:e011354. [PMID: 36802906 DOI: 10.1161/circep.122.011354] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
BACKGROUND Recurrences of atrial fibrillation (AF) after pulmonary vein isolation (PVI) are mainly due to pulmonary vein reconnection. However, a growing number of patients have AF recurrences despite durable PVI. The optimal ablative strategy for these patients is unknown. We analyzed the impact of current ablation strategies in a large multicenter study. METHODS Patients undergoing a redo ablation for AF and presenting durable PVI were included. The freedom from atrial arrhythmia after pulmonary vein-based, linear-based, electrogram-based, and trigger-based ablation strategies were compared. RESULTS Between 2010 and 2020, 367 patients (67% men, 63±10 years, 44% paroxysmal) underwent a redo ablation for AF recurrences despite durable PVI at 39 centers. After durable PVI was confirmed, linear-based ablation was performed in 219 (60%) patients, electrogram-based ablation in 168 (45%) patients, trigger-based ablation in 101 (27%) patients, and pulmonary vein-based ablation in 56 (15%) patients. Seven patients (2%) did not undergo any additional ablation during the redo procedure. After 22±19 months of follow-up, 122 (33%) and 159 (43%) patients had a recurrence of atrial arrhythmia at 12 and 24 months, respectively. No significant difference in arrhythmia-free survival was observed between the different ablation strategies. Left atrial dilatation was the only independent factor associated with arrhythmia-free survival (HR, 1.59 [95% CI, 1.13-2.23]; P=0.006). CONCLUSIONS In patients with recurrent AF despite durable PVI, no ablation strategy used alone or in combination during the redo procedure appears to be superior in improving arrhythmia-free survival. Left atrial size is a significant predictor of ablation outcome in this population.
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Affiliation(s)
- Karim Benali
- CHU Saint Etienne, University of Rennes, INSERM, LTSI -UMR 1099, Rennes (K.B.)
| | - Valentin Barré
- University of Rennes, CHU Rennes, INSERM, LTSI-UMR 1099, Rennes (V.B., V.G., D.P., R.P.M.)
| | | | - Vincent Galand
- University of Rennes, CHU Rennes, INSERM, LTSI-UMR 1099, Rennes (V.B., V.G., D.P., R.P.M.)
| | | | | | - Serge Boveda
- Cardiology-Heart Rhythm Management Department, Clinique Pasteur, Toulouse (S.B.)
| | | | | | | | | | | | | | | | | | | | | | - Frédéric Sebag
- Rythmologie, Institut Mutualiste Montsouris, Paris (F.S.)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Babé Bakouboula
- Institut Cardiovasculaire de Strasbourg, Clinique RHENA (B.B.)
| | | | | | | | | | | | | | | | | | - Dominique Pavin
- University of Rennes, CHU Rennes, INSERM, LTSI-UMR 1099, Rennes (V.B., V.G., D.P., R.P.M.)
| | - Laurent Macle
- Department of Medicine, Electrophysiology Service at the Montreal Heart Institute, Canada (L.M.)
| | - Raphaël P Martins
- University of Rennes, CHU Rennes, INSERM, LTSI-UMR 1099, Rennes (V.B., V.G., D.P., R.P.M.)
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Laredo M, Duthoit G, Sacher F, Anselme F, Audinet C, Bessière F, Bordachar P, Bouzeman A, Boveda S, Bun SS, Chassignolle M, Clerici G, Da Costa A, de Guillebon M, Defaye P, Elbaz N, Eschalier R, Extramiana F, Fauchier L, Hermida A, Gandjbakhch E, Garcia R, Gourraud JB, Guenancia C, Guy-Moyat B, Irles D, Iserin L, Jourda F, Koutbi L, Labombarda F, Ladouceur M, Lagrange P, Lellouche N, Mansourati J, Marquié C, Martins R, Massoulié G, Mathiron A, Maury P, Messali A, Milhem A, Mondoly P, Nguyen C, Ninni S, Pasquié JL, Pierre B, Pujadas P, Sellal JM, Thambo JB, Walton C, Winum P, Zakine C, Zhao A, Jouven X, Combes N, Marijon E, Waldmann V. Rapid ventricular tachycardia in patients with tetralogy of Fallot and implantable cardioverter-defibrillator: Insights from the DAI-T4F nationwide registry. Heart Rhythm 2023; 20:252-260. [PMID: 36309156 DOI: 10.1016/j.hrthm.2022.10.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 09/28/2022] [Accepted: 10/19/2022] [Indexed: 11/04/2022]
Abstract
BACKGROUND In repaired tetralogy of Fallot (TOF), little is known about characteristics of patients with rapid ventricular tachycardia (VT). Also, whether patients with a first episode of nonrapid VT may subsequently develop rapid VT or ventricular fibrillation (VF) has not been addressed. OBJECTIVES The objectives of this study were to compare patients with rapid VT/VF with those with nonrapid VT and to assess the evolution of VT cycle lengths (VTCLs) overtime. METHODS Data were analyzed from a nationwide registry including all patients with TOF and implantable cardioverter-defibrillator (ICD) since 2000. Patients with ≥1 VT episode with VTCL ≤250 ms (240 beats/min) formed the rapid VT/VF group. RESULTS Of 144 patients (mean age 42.0 ± 12.7 years; 104 [72%] men), 61 (42%) had at least 1 VT/VF episode, including 28 patients with rapid VT/VF (46%), during a median follow-up of 6.3 years (interquartile range 2.2-10.3 years). Compared with patients in the nonrapid VT group, those in the rapid VT/VF group were significantly younger at ICD implantation (35.2 ± 12.6 years vs 41.5 ± 11.2 years; P = .04), had more frequently a history of cardiac arrest (8 [29%] vs 2 [6%]; P = .02), less frequently a history of atrial arrhythmia (11 [42%] vs 22 [69%]; P = .004), and higher right ventricular ejection fraction (43.3% ± 10.3% vs 36.6% ± 11.2%; P = .04). The median VTCL of VT/VF episodes was 325 ms (interquartile range 235-429 ms). None of the patients with a first documented nonrapid VT episode had rapid VT/VF during follow-up. CONCLUSION Patients with TOF and rapid VT/VF had distinct clinical characteristics. The relatively low variation of VTCL over time suggests a room for catheter ablation without a backup ICD in selected patients with well-tolerated VT.
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Affiliation(s)
- Mikael Laredo
- Unité de Rythmologie, Cardiology institute, Sorbonne University, AP-HP, La Pitié-Salpêtrière University Hospital, Paris, France
| | - Guillaume Duthoit
- Unité de Rythmologie, Cardiology institute, Sorbonne University, AP-HP, La Pitié-Salpêtrière University Hospital, Paris, France
| | - Frédéric Sacher
- LIRYC Institute, Bordeaux University Hospital, Bordeaux, France
| | | | | | | | | | | | | | | | - Morgane Chassignolle
- Université de Paris, INSERM, Paris Cardiovascular Research Centre, Paris, France
| | - Gaël Clerici
- Saint Pierre University Hospital, La Réunion, France
| | | | | | | | | | | | | | | | | | - Estelle Gandjbakhch
- Unité de Rythmologie, Cardiology institute, Sorbonne University, AP-HP, La Pitié-Salpêtrière University Hospital, Paris, France
| | | | | | | | | | | | - Laurence Iserin
- Adult Congenital Heart Disease Medico-Surgical Unit, European Georges Pompidou Hospital, Paris, France
| | | | | | | | - Magalie Ladouceur
- Université de Paris, INSERM, Paris Cardiovascular Research Centre, Paris, France; Adult Congenital Heart Disease Medico-Surgical Unit, European Georges Pompidou Hospital, Paris, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Xavier Jouven
- Université de Paris, INSERM, Paris Cardiovascular Research Centre, Paris, France; Cardiac Electrophysiology Section, European Georges Pompidou Hospital, Paris, France
| | | | - Eloi Marijon
- Université de Paris, INSERM, Paris Cardiovascular Research Centre, Paris, France; Cardiac Electrophysiology Section, European Georges Pompidou Hospital, Paris, France
| | - Victor Waldmann
- Université de Paris, INSERM, Paris Cardiovascular Research Centre, Paris, France; Adult Congenital Heart Disease Medico-Surgical Unit, European Georges Pompidou Hospital, Paris, France; Cardiac Electrophysiology Section, European Georges Pompidou Hospital, Paris, France.
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Bortone AA, Marijon E, Limite LR, Lagrange P, Brigadeau F, Martins R, Durand C, Albenque JP. Pulmonary vein isolation alone or in combination with substrate modulation after electrical cardioversion failure in patients with persistent atrial fibrillation: The PACIFIC trial: Study design. J Cardiovasc Electrophysiol 2023; 34:270-278. [PMID: 36434797 DOI: 10.1111/jce.15761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/14/2022] [Accepted: 11/22/2022] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Pulmonary vein isolation (PVI) is effective at treating 50% of unselected patients with persistent atrial fibrillation (AF). Alternatively, PVI combined with a new ablation strategy entitled the Marshall-PLAN ensures a 78% 1-year sinus rhythm (SR) maintenance rate in the same population. However, a substantial subset of patients could undergo the Marshall-PLAN unnecessarily. It is therefore essential to identify those patients who can be treated with PVI alone versus those who may truly benefit from the Marshall-PLAN before ablation is performed. In this context, we hypothesized that electrical cardioversion (EC) could help to select the most appropriate strategy for each patient. METHODS In this multicentre, prospective, randomized study, patients with AF recurrence within 4 weeks after EC will be randomized 1:1 to PVI alone or the Marshall-PLAN. Conversely, patients in whom SR is maintained for ≥4 weeks after EC will be treated with PVI only and included in a prospective registry. The primary endpoint will be the 1-year SR maintenance rate after a single ablation procedure. RESULTS AND CONCLUSION The Marshall-PLAN might be necessary in patients with an advanced degree of persistent AF (i.e., where SR is not maintained for ≥4 uninterrupted weeks after EC). Conversely, in patients with mild or moderate persistent AF (i.e., where SR is maintained for ≥4 weeks after EC), PVI alone might be a sufficient ablation strategy. The PACIFIC trial is the first study designed to assess whether rhythm monitoring after EC could help to identify patients who should undergo adjunctive ablation strategies beyond PVI.
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Affiliation(s)
| | - Eloi Marijon
- Service de Cardiologie, Hôpital Européen Georges Pompidou, Paris, France
| | - Luca Rosario Limite
- Service de Cardiologie, Hôpital Privé Les Franciscaines, ELSAN, Nîmes, France
| | - Philippe Lagrange
- Service de Cardiologie, Clinique St Pierre, ELSAN, Perpignan, France
| | - François Brigadeau
- Service de Rythmologie, Centre Hospitalo-Universitaire de Lille, Lille, France
| | - Raphaël Martins
- Service de Cardiologie, Centre Hospitalo-Universitaire de Rennes, Rennes, France
| | - Cyril Durand
- Service de Rythmologie, Infirmerie Protestante de Lyon, Lyon, France
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El Hajj I, Speyer L, Cahen S, Berger P, Medjahdi G, Lagrange P, Hérold C. Simultaneous intercalation of lithium, potassium and strontium into graphite in molten salts medium. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Waldmann V, Bouzeman A, Duthoit G, Koutbi L, Bessière F, Labombarda F, Marquié C, Gourraud JB, Mondoly P, Sellal JM, Bordachar P, Hermida A, Al Arnaout A, Anselme F, Audinet C, Bernard Y, Boveda S, Bun SS, Chassignolle M, Clerici G, Da Costa A, de Guillebon M, Defaye P, Elbaz N, Eschalier R, Garcia R, Guenancia C, Guy-Moyat B, Halimi F, Irles D, Iserin L, Jourda F, Ladouceur M, Lagrange P, Laredo M, Mansourati J, Massoulié G, Mathiron A, Maury P, Messali A, Narayanan K, Nguyen C, Ninni S, Perier MC, Pierre B, Pujadas P, Sacher F, Sagnol P, Sharifzadehgan A, Walton C, Winum P, Zakine C, Fauchier L, Martins R, Pasquié JL, Thambo JB, Jouven X, Combes N, Marijon E. Sex Differences in Outcomes of Tetralogy of Fallot Patients With Implantable Cardioverter-Defibrillators. JACC Clin Electrophysiol 2022; 8:1304-1314. [DOI: 10.1016/j.jacep.2022.06.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 05/24/2022] [Accepted: 06/09/2022] [Indexed: 11/30/2022]
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Sousa PA, Barra S, Adão L, Primo J, Khoueiry Z, Puga L, Lebreiro A, Fonseca P, Lagrange P, Gonçalves L. Assessment of the Need of a Waiting Period after Pulmonary Vein Isolation with the Ablation Index Software. J Cardiovasc Electrophysiol 2022; 33:1725-1733. [PMID: 35637604 DOI: 10.1111/jce.15568] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 04/20/2022] [Accepted: 05/07/2022] [Indexed: 11/29/2022]
Abstract
PURPOSE Since the widespread availability of contact-force sensing catheters, the need of a waiting period after pulmonary vein isolation (PVI) has not been reassessed. We aim to evaluate whether a waiting period is still necessary after PVI guided by the Ablation Index (AI). METHODS Prospective, multicenter, randomized study of consecutive patients referred for paroxysmal atrial fibrillation (AF) ablation from May 2019 to February 2020. Patients were randomized in a 1:1 ratio to PVI with versus without a waiting period of 20 minutes. Acute pulmonary vein (PV) reconnection after adenosine challenge was the primary endpoint. A per-protocol analysis was designed to determine whether a strategy of dismissing the waiting period after PVI was noninferior to waiting 20minutes for identifying acute PV reconnection. PVI was guided by tailored AI values and an inter-lesion distance ≤6mm. RESULTS During the enrollment period, 167 patients (56% males, mean age of 57±14 years) fulfilled the study inclusion criteria - 84 patients (308 PV) in the waiting period group (group A) and 83 patients (314 PV) in the group without a waiting period (group B). Acute PV reconnection was identified in 3.8% (95% CI, 1.7% to 5.9%) of PVs in the study group B compared to 2.9% (95% CI, 1.0% to 4.8%) of PVs in the group A (p=0.002 for non-inferiority). At 1-year follow-up there was no significant difference in arrhythmia recurrence between groups (9.5% in group A vs. 9.6% in group B, HR 1.03 [95% CI, 0.39-2.73], p=0.98). CONCLUSIONS In paroxysmal AF patients submitted to ablation, a tailored PVI guided by the Ablation Index rendered a 20-minute waiting period unnecessary. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Pedro A Sousa
- Pacing & Electrophysiology Unit, Cardiology Department, Coimbra's Hospital and University Center, Coimbra, Portugal
| | - Sérgio Barra
- Cardiology Department, Hospital da Luz Arrábida, V. N. Gaia, Portugal
| | - Luís Adão
- Cardiology Department, University Hospital Center of São João, Porto, Portugal
| | - João Primo
- Cardiology Department, Vila Nova de Gaia & Espinho Hospital Center, V. N. Gaia, Portugal
| | - Ziad Khoueiry
- Cardiology Department, Clinique Saint Pierre, Perpignan, France
| | - Luís Puga
- Pacing & Electrophysiology Unit, Cardiology Department, Coimbra's Hospital and University Center, Coimbra, Portugal
| | - Ana Lebreiro
- Cardiology Department, University Hospital Center of São João, Porto, Portugal
| | - Paulo Fonseca
- Cardiology Department, Vila Nova de Gaia & Espinho Hospital Center, V. N. Gaia, Portugal
| | | | - Lino Gonçalves
- Pacing & Electrophysiology Unit, Cardiology Department, Coimbra's Hospital and University Center, Coimbra, Portugal.,ICBR, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Sousa PA, Puga L, Adão L, Primo J, Khoueiry Z, Lebreiro A, Fonseca P, Lagrange P, Elvas L, Gonçalves L. Two years after pulmonary vein isolation guided by ablation index—a multicenter study. J Arrhythm 2022; 38:346-352. [PMID: 35785367 PMCID: PMC9237314 DOI: 10.1002/joa3.12696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/05/2022] [Accepted: 03/07/2022] [Indexed: 11/08/2022] Open
Affiliation(s)
- Pedro A. Sousa
- Pacing & Electrophysiology Unit, Cardiology Department Coimbra's Hospital and University Center Coimbra Portugal
| | - Luís Puga
- Pacing & Electrophysiology Unit, Cardiology Department Coimbra's Hospital and University Center Coimbra Portugal
| | - Luís Adão
- Cardiology Department University Hospital Center of São João Porto Portugal
| | - João Primo
- Cardiology Department Vila Nova de Gaia & Espinho Hospital Center Portugal
| | - Ziad Khoueiry
- Cardiology Department Clinique Saint Pierre Perpignan France
| | - Ana Lebreiro
- Cardiology Department University Hospital Center of São João Porto Portugal
| | - Paulo Fonseca
- Cardiology Department Vila Nova de Gaia & Espinho Hospital Center Portugal
| | | | - Luís Elvas
- Pacing & Electrophysiology Unit, Cardiology Department Coimbra's Hospital and University Center Coimbra Portugal
| | - Lino Gonçalves
- Pacing & Electrophysiology Unit, Cardiology Department Coimbra's Hospital and University Center Coimbra Portugal
- ICBR, Faculty of Medicine University of Coimbra Coimbra Portugal
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De Campos D, Sousa P, Adao L, Primo J, Khoueiry Z, Lebreiro A, Fonseca P, Lagrange P, Elvas L, Goncalves L. A multicentered evaluation of the waiting period after PVI guided by the Ablation Index. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Since the widespread availability of contact-force sensing catheters the need of a waiting period has not been reassessed in paroxysmal atrial fibrillation (AF) ablation.
Objective
The purpose of this study was to evaluate if pulmonary vein isolation (PVI) guided by the Ablation Index (AI) could spare the need for a waiting phase.
Methods
This multicentre, prospective, randomized study consecutively recruited patients referred for first-time catheter ablation of symptomatic drug-refractory paroxysmal AF from May 2019 to February 2020. Patients performed PVI tailored to different AI values according to the different left atrium walls (550 for anterior, 500 for roof, 450 for inferior and 400 for posterior). Patients were enrolled in 1:1 ratio to PVI and 20 min of waiting time versus PVI without a waiting period. Acute reconnection (either spontaneous or after adenosine) and 1-year arrhythmia freedom were analyzed.
Results
The study included 124 patients (61 in the waiting period group and 63 in the group without the waiting period). There was no significant differences between groups regarding baseline characteristics, echocardiographic and procedure data. There were no significant differences between both groups regarding the first-pass PV isolation (P=0.49) and the presence of low voltage areas (P=0.71). Median PVI time (P=0.40), median fluoroscopy time (P=0.35) and median overall procedure time (P=0.70) were also similar between groups. The acute PVR rate was similar between both groups (8.2% for the waiting period group vs 11.1% in the group without a waiting phase, P=0.40). After a median follow-up of 14 (IQR 12–18) months, there was no significant difference on the arrhythmia recurrence between groups (4.9% for the waiting group vs 12.7% for the group without a waiting phase, P=0.13). Both groups presented a similar arrhythmia freedom over time (log rank P of 0.109). The waiting period time was not a predictor of recurrence during follow-up (p=0.13).
Conclusion
PVI guided by Ablation Index preclude the need of a waiting phase. Adding a 20-minute waiting period did not significantly increase the acute PV reconnection, neither improve the 1-year arrhythmia freedom.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- D De Campos
- University Hospitals of Coimbra, Coimbra, Portugal
| | - P Sousa
- University Hospitals of Coimbra, Coimbra, Portugal
| | - L Adao
- Centro Hospitalar Universitario Sao Joao, Porto, Portugal
| | - J Primo
- Hospital Center Vila Nova Gaia, Porto, Portugal
| | | | - A Lebreiro
- Centro Hospitalar Universitario Sao Joao, Porto, Portugal
| | - P Fonseca
- Hospital Center Vila Nova Gaia, Porto, Portugal
| | | | - L Elvas
- University Hospitals of Coimbra, Coimbra, Portugal
| | - L Goncalves
- University Hospitals of Coimbra, Coimbra, Portugal
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Waldmann V, Bouzeman A, Duthoit G, Koutbi L, Bessiere F, Labombarda F, Marquié C, Gourraud JB, Mondoly P, Sellal JM, Bordachar P, Hermida A, Anselme F, Asselin A, Audinet C, Bernard Y, Bru P, Sithikun Bun S, Clerici G, Da Costa A, de Guillebon M, Defaye P, Elbaz N, Eschalier R, Garcia R, Guenancia C, Guy-Moyat B, Halimi F, Irles D, Iserin L, Jourda F, Ladouceur M, Lagrange P, Laredo M, Mansourati J, Massoulié G, Mathiron A, Maury P, Messali A, Narayanan K, Nguyen C, Ninni S, Perier MC, Pierre B, Pujadas P, Sacher F, Sagnol P, Sharifzadehgan A, Walton C, Winum P, Zakine C, Fauchier L, Martins R, Pasquié JL, Thambo JB, Jouven X, Combes N, Marijon E. Long-term follow-up of patients with tetralogy of fallot and implantable cardioverter defibrillator–The DAI-T4F nationwide registry. Archives of Cardiovascular Diseases Supplements 2021. [DOI: 10.1016/j.acvdsp.2021.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Waldmann V, Bouzeman A, Duthoit G, Koutbi R, Bessiere F, Hermida A, Elbaz N, Messali A, Garcia R, Pujadas P, Halimi F, Bun S, Lagrange P, De Guillebon M, Mansourati J, Da Costa A, Martins R, Gourraud J, Combes N, Marijon E. Electrocardiographic predictors of appropriate implantable cardioverter defibrillator therapies in patients with tetralogy of Fallot. Archives of Cardiovascular Diseases Supplements 2020. [DOI: 10.1016/j.acvdsp.2019.09.240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Cahen S, El-Hajj I, Speyer L, Berger P, Medjahdi G, Lagrange P, Lamura G, Hérold C. Original synthesis route of bulk binary superconducting graphite intercalation compounds with strontium, barium and ytterbium. NEW J CHEM 2020. [DOI: 10.1039/c9nj06423k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis route in molten salts allows the bulk intercalation into graphite of elements hardly intercalated by themselves. XRD and ion beam analyses show for instance the possible synthesis of SrC6.
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Affiliation(s)
- S. Cahen
- Institut Jean Lamour
- UMR 7198 CNRS-UL
- 54011 Nancy Cedex
- France
| | - I. El-Hajj
- Institut Jean Lamour
- UMR 7198 CNRS-UL
- 54011 Nancy Cedex
- France
| | - L. Speyer
- Institut Jean Lamour
- UMR 7198 CNRS-UL
- 54011 Nancy Cedex
- France
| | - P. Berger
- NIMBE
- CEA
- CNRS
- Université Paris-Saclay
- Gif sur Yvette Cedex
| | - G. Medjahdi
- Institut Jean Lamour
- UMR 7198 CNRS-UL
- 54011 Nancy Cedex
- France
| | - P. Lagrange
- Institut Jean Lamour
- UMR 7198 CNRS-UL
- 54011 Nancy Cedex
- France
| | | | - C. Hérold
- Institut Jean Lamour
- UMR 7198 CNRS-UL
- 54011 Nancy Cedex
- France
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14
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Cahen S, Speyer L, Lagrange P, Hérold C. Topotactic Mechanisms Related to the Graphene Planes: Chemical Intercalation of Electron Donors into Graphite. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900758] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sébastien Cahen
- Carbon‐Based Materials Group Campus ARTEM ‐ 2 Allée André Guinier, B.P. 50840 54011 Nancy Cedex France
| | - Lucie Speyer
- Carbon‐Based Materials Group Campus ARTEM ‐ 2 Allée André Guinier, B.P. 50840 54011 Nancy Cedex France
| | - Philippe Lagrange
- Carbon‐Based Materials Group Campus ARTEM ‐ 2 Allée André Guinier, B.P. 50840 54011 Nancy Cedex France
| | - Claire Hérold
- Carbon‐Based Materials Group Campus ARTEM ‐ 2 Allée André Guinier, B.P. 50840 54011 Nancy Cedex France
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15
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Bortone A, Lagrange P, Cauchemez B, Durand C, Dieuzaide P, Prévot S, Mechulan A, Pambrun T, Martin R, Parlier P, Masse A, Marijon E, Albenque JP. Elimination of the negative component of the unipolar electrogram as a local procedural endpoint during paroxysmal atrial fibrillation catheter ablation using contact-force sensing: the UNIFORCE study. J Interv Card Electrophysiol 2017. [PMID: 28643171 DOI: 10.1007/s10840-017-0264-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
PURPOSE Elimination of the negative component of the unipolar atrial electrogram is a reliable indicator of the creation of a transmural lesion. Contact-force (CF) sensing technology has the potential to increase the durability of pulmonary vein isolation (PVI). In the present multicenter study, we assessed the 2-year sinus rhythm (SR) maintenance rate in patients with paroxysmal atrial fibrillation (PAF) after PVI guided by these two approaches. METHODS Two hundred fifteen consecutive PAF patients (62.1 ± 10.1 years, 65 women) were prospectively enrolled. All patients underwent PVI under CARTO guidance according to a systematic contiguous "point-by-point" approach, using radiofrequency energy, and a CF externally irrigated ablation catheter with the goal of at least 10g (ideally 20g) of force. The ablation endpoint of each individual lesion was elimination of the negative component of the unipolar atrial signal. The procedural endpoint was PVI with bidirectional block. RESULTS All PVs were successfully isolated. After 30 min of waiting time, 35 patients (16%) had PV reconnection and in all of them, the PVs were re-isolated. Two years after a single ablation procedure, 187 patients (87%) remained arrhythmia free, without anti-arrhythmic drugs. Of the 28 patients presenting with AF recurrence, 25 had PV reconnection and underwent repeat PVI while in the remaining 3 patients, all four PVs were isolated and extra-PV triggers were identified. There were six groin hematomas and one transient ischemic attack. CONCLUSIONS Unipolar atrial signal analysis combined with CF sensing ensures a robust 2-year SR maintenance rate in the treatment of PAF. Clinical trial registration-URL: http://www.clinicaltrials.gov . Unique identifier: NCT02520960.
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Affiliation(s)
- Agustín Bortone
- Service de Cardiologie, Hôpital Privé Les Franciscaines, Nîmes, France.
| | | | - Bruno Cauchemez
- Service de Rythmologie, Clinique Ambroise Paré, Neuilly sur Seine, France
| | - Cyril Durand
- Département de Rythmologie, Infirmerie Protestante, Lyon, France
| | - Pierre Dieuzaide
- Département de Rythmologie, Hôpital Privé Clairval, Marseille, France
| | - Sébastien Prévot
- Département de Rythmologie, Hôpital Privé Clairval, Marseille, France
| | - Alexis Mechulan
- Département de Rythmologie, Hôpital Privé Clairval, Marseille, France
| | - Thomas Pambrun
- Service de Cardiologie, Hôpital Privé Les Franciscaines, Nîmes, France.,LYRIC Institute/INSERM 1045, University Hospital Haut-Leveque, Bordeaux, France
| | - Ruairidh Martin
- LYRIC Institute/INSERM 1045, University Hospital Haut-Leveque, Bordeaux, France
| | - Pauline Parlier
- Biosense Webster France, Johnson & Johnson, Issy les Moulineaux, France
| | - Alexandre Masse
- Biosense Webster France, Johnson & Johnson, Issy les Moulineaux, France
| | - Eloi Marijon
- Département de Cardiologie, Hôpital Européen Georges Pompidou, Paris, France
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17
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Lagrange J, Lagrange P. Contrôle et traitement des données cinétiques obtenues par spectrophotométrie à écoulement bloqué à l'aide d'un ordinateur individuel. Hydrolyse acide d'un chelate du vanadium (V). ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1984810425] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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18
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Fux P, Lagrange J, Lagrange P. Complexation de l'ion uranyle par des ligands macrocycliques du type ether-couronne ou cryptand en milieu carbonate de propylène. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1984810321] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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19
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Guerard D, Lagrange P. Calcul du rayon des espèces insérées dans les graphitures métalliques et évaluation du transfert de charge. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1984810853] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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20
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Assouik J, Hajji L, Boukir A, Chaouqi M, Lagrange P. Heavy alkali metal-arsenic alloy-based graphite intercalation compounds: Investigation of their synthesis and of their physical properties. CR CHIM 2017. [DOI: 10.1016/j.crci.2016.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Laouénan C, Bonnet D, Gharbi M, Martin-Chollet S, Rabian C, Lagrange P, Molina JM, Bouvet E, Mentré F, Duval X. Corrélation entre les tests interférons gamma (IGRA) et l’intradermoréaction à la tuberculine (IDR) pour le diagnostic de l’infection tuberculeuse latente (ITL) dans une population de patients infectés par le VIH naïfs de traitement antirétroviral. Rev Epidemiol Sante Publique 2014. [DOI: 10.1016/j.respe.2013.12.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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22
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Cahen S, Lagrange P, Marêché JF, Hérold C. Analogies and differences between calcium-based and europium-based graphite intercalation compounds. CR CHIM 2013. [DOI: 10.1016/j.crci.2012.11.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Gimenez O, Abadi F, Barnagaud JY, Blanc L, Buoro M, Cubaynes S, Desprez M, Gamelon M, Guilhaumon F, Lagrange P, Madon B, Marescot L, Papadatou E, Papaïx J, Péron G, Servanty S. How can quantitative ecology be attractive to young scientists? Balancing computer/desk work with fieldwork. Anim Conserv 2012. [DOI: 10.1111/j.1469-1795.2012.00597.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- O. Gimenez
- Centre d'Ecologie Fonctionnelle et Evolutive; campus CNRS; Montpellier; France
| | - F. Abadi
- Centre d'Ecologie Fonctionnelle et Evolutive; campus CNRS; Montpellier; France
| | - J-Y. Barnagaud
- Institut National pour la Recherche Agronomique; UMR BIOGECO; Cestas; France
| | - L. Blanc
- Centre d'Ecologie Fonctionnelle et Evolutive; campus CNRS; Montpellier; France
| | - M. Buoro
- Department of Environmental Science, Policy, and Management; University of California; Berkeley; CA; USA
| | - S. Cubaynes
- Department of Life Sciences; Imperial College London; Berkshire; UK
| | - M. Desprez
- Marine Mammal Research Group, Graduate School of Environment; Macquarie University; North Ryde; Australia
| | | | - F. Guilhaumon
- ‘Rui Nabeiro’ Biodiversity Chair; CIBIO - Universidade de Évora. Casa Cordovil, Rua Dr. Joaquim Henrique da Fonseca; Évora; Portugal
| | | | - B. Madon
- Boomerang for Earth Conservation; Antony; France
| | - L. Marescot
- Centre d'Ecologie Fonctionnelle et Evolutive; campus CNRS; Montpellier; France
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24
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Benkemoun H, Sacrez J, Lagrange P, Amiel A, Prakash A, Himmrich E, Aimè E, Mairesse GH, Guénon C, Sbragia P. Optimizing pacemaker longevity with pacing mode and settings programming: results from a pacemaker multicenter registry. Pacing Clin Electrophysiol 2012; 35:403-8. [PMID: 22309354 DOI: 10.1111/j.1540-8159.2011.03318.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND This study aimed to describe the influence on dual-chamber devices' expected longevity of devices' settings. METHODS Data from patients implanted with dual chamber devices (Symphony™, SORIN CRM SAS, Clamart, France) from 2003 to 2006 were collected in registries. Programmer files were retrieved: device-estimated longevity, assessed through algorithm prediction, was analyzed according to device settings. RESULTS One thousand sixty-eight recipients of dual chamber pacemaker in sinus rhythm (75.3±11.1 years, 54.5% male, ventricular block 30%, brady-tachy syndrome 21%, and sinus node dysfunction 49%) were followed up to 14.2±12.1 months (ranging from first quartile Q1: 2.9 months to fourth quartile Q4: 49.3 months) after implantation. DDD with automatic mode conversion and minimized ventricular pacing (SafeR) modes were programmed in 34.3%, 2.9%, and 62.8% of the patients, respectively. The mean total longevity estimated by the device was 134.1±31.5 months (11.2±2.6 years). Significant increase in longevity was observed in devices undergoing at least one reprogramming (134.4±31.4 months) versus device presenting no reprogramming (103.4±32.3 months, P=0.0005). The parameters associated with the major increase in mean longevity were the mode (mean longevity increase of +23.9 months in SafeR as compared to DDD mode, P<0.0001) and the atrial (A) and ventricular (V) amplitudes (mean longevity increase of +29.6 and +26.9 months for a decrease of less than 1V in A and V outputs respectively, P<0.0001). CONCLUSION This study provides information on dual chamber pacemakers' longevity and highlights the impact of devices' reprogramming on expected longevities.
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Estrade-Szwarckopf H, Conard J, Lauginie P, Van Der Klink J, Lagrange P, Guerard D, Rousseauxl F, Nancy L, Maaroufi A, Hermann G. Cesium State, Thermal Evolution In Csc24. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-20-369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTBy 133Cs and 13C NMR, EPR, susceptibility anisotropy and X-Ray diffraction,we studied the thermal evolution of Cs24 from 100 to 500 K. A smooth transition is observed near 300 K which can be interpreted in structural and electronic terms: at lower temperatures, the Cs atoms are located in a disordered manner on graphitic hexagonal sites and are almost completely ionized; in the high temperature state, the Cs atoms are completely disordered relatively to the graphitic lattice and their electrons are at least partly relocalized on the metallic s-function.
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Emery N, Hérold C, Marêché JF, Lagrange P. Synthesis and superconducting properties of CaC 6. Sci Technol Adv Mater 2008; 9:044102. [PMID: 27878015 PMCID: PMC5099629 DOI: 10.1088/1468-6996/9/4/044102] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2008] [Revised: 01/28/2009] [Accepted: 11/06/2008] [Indexed: 05/27/2023]
Abstract
Among the superconducting graphite intercalation compounds, CaC6 exhibits the highest critical temperature Tc=11.5 K. Bulk samples of CaC6 are obtained by immersing highly oriented pyrographite pieces in a well-chosen liquid Li-Ca alloy for 10 days at 350 °C. The crystal structure of CaC6 belongs to the [Formula: see text] space group. In order to study the superconducting properties of CaC6, magnetisation was measured as a function of temperature and direction of magnetic field applied parallel or perpendicular to the c-axis. Meissner effect was evidenced, as well as a type II superconducting behaviour and a small anisotropy. In agreement with calculations, experimental results obtained from various techniques suggest that a classical electron-phonon mechanism is responsible for the superconductivity of CaC6. Application of high pressure increases the Tc up to 15.1 K at 8 GPa.
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Affiliation(s)
- Nicolas Emery
- Laboratoire de Chimie du Solide Minéral—UMR 7555, Nancy Université, Université Henri Poincaré, BP 239, 54506 Vandœuvre-lès-Nancy Cedex, France
| | - Claire Hérold
- Laboratoire de Chimie du Solide Minéral—UMR 7555, Nancy Université, Université Henri Poincaré, BP 239, 54506 Vandœuvre-lès-Nancy Cedex, France
| | - Jean-François Marêché
- Laboratoire de Chimie du Solide Minéral—UMR 7555, Nancy Université, Université Henri Poincaré, BP 239, 54506 Vandœuvre-lès-Nancy Cedex, France
| | - Philippe Lagrange
- Laboratoire de Chimie du Solide Minéral—UMR 7555, Nancy Université, Université Henri Poincaré, BP 239, 54506 Vandœuvre-lès-Nancy Cedex, France
- Ecole Européenne d'Ingénieurs en Génie des Matériaux, Institut National Polyechnique de Lorraine, 6 rue Bastien Lepage, BP 630, 54010 Nancy Cedex, France
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Emery N, Hérold C, Bellouard C, Delcroix P, Marêché JF, Lagrange P. Synthesis and characterisation of a novel europium-based graphite intercalation compound. J SOLID STATE CHEM 2008. [DOI: 10.1016/j.jssc.2008.07.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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28
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Gauzzi A, Takashima S, Takeshita N, Terakura C, Takagi H, Emery N, Hérold C, Lagrange P, Loupias G. Enhancement of superconductivity and evidence of structural instability in intercalated graphite CaC6 under high pressure. Phys Rev Lett 2007; 98:067002. [PMID: 17358974 DOI: 10.1103/physrevlett.98.067002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2006] [Revised: 03/24/2006] [Indexed: 05/14/2023]
Abstract
We measured the temperature dependent resistivity, varrho(T), of the intercalated graphite superconductor CaC6 as a function of pressure up to 16 GPa. We found a large linear increase of critical temperature, Tc, from the ambient pressure value 11.5 K up to 15.1 K, the largest value for intercalated graphite, at 7.5 GPa. At approximately 8 GPa, a jump of varrho and a sudden drop of Tc down to approximately 5 K indicates the occurrence of a phase transition. Our data analysis suggests that a pressure-induced phonon softening related to an in-plane Ca phonon mode is responsible for the Tc increase and that higher pressures greater, similar8 GPa lead to a structural transition into a new phase with a low Tc less, similar3 K.
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Affiliation(s)
- A Gauzzi
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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29
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Rodríguez-Fortea A, Rovira C, Ordejón P, Hérold C, Lagrange P, Canadell E. Electronic Structure and Charge Transfer in the Ternary Intercalated Graphite β-KS 0.25C 3. Inorg Chem 2006; 45:9387-93. [PMID: 17083238 DOI: 10.1021/ic0612395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The electronic structure of the ternary intercalated graphite beta-KS(0.25)C3 is studied by means of a first-principles density functional theory approach. The nature of the partially filled bands is analyzed, and the K sublayers of the intercalate are shown to have an important contribution to the Fermi surface. This K-based contribution confers a sizable three-dimensional character to the conductivity even if considerably less than that for the related binary KC8. The electronic structure of beta-KS(0.25)C3 differs noticeably from that of the related ternary compound, KH(x)C4. The charge transfer is analyzed, and a way to evaluate it, which can be used in general for intercalated graphites, is proposed. The charge transfer per C atom in this ternary material is shown to be smaller than that in the KC8 binary compound despite a more favorable stoichiometry ratio between K and C.
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Affiliation(s)
- Antonio Rodríguez-Fortea
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel.li Domingo s/n, 43007 Tarragona, Spain
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Drouillon V, Houriez F, Buze M, Lagrange P, Herrmann JL. [Automated RNA amplification for the rapid identification of Mycobacterium tuberculosis complex in respiratory specimens]. ACTA ACUST UNITED AC 2006; 54:518-22. [PMID: 17027192 DOI: 10.1016/j.patbio.2006.07.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2006] [Accepted: 07/27/2006] [Indexed: 10/24/2022]
Abstract
Rapid and sensitive detection of Mycobacterium tuberculosis complex (MTB) directly on clinical respiratory specimens is essential for a correct management of patients suspected of tuberculosis. For this purpose PCR-based kits are available to detect MTB in respiratory specimen but most of them need at least 4 hours to be completed. New methods, based on TRC method (TRC: Transcription Reverse transcription Concerted--TRCRapid M. Tuberculosis--Tosoh Bioscience, Tokyo, Japon) and dedicated monitor have been developed. A new kit (TRC Rapid M. tuberculosis and Real-time monitor TRCRapid-160, Tosoh Corporation, Japan) enabling one step amplification and real-time detection of MTB 16S rRNA by a combination of intercalative dye oxazole yellow-linked DNA probe and isothermal RNA amplification directly on respiratory specimens has been tested in our laboratory. 319 respiratory specimens were tested in this preliminary study and results were compared to smear and culture. Fourteen had a positive culture for MTB. Among theses samples, smear was positive in 11 cases (78.6%) and TRC process was positive in 8 cases (57.1%). Overall sensitivity of TRC compared to smear positive samples is 73%. Theses first results demonstrated that a rapid identification of MTB was possible (less than 2 processing hours for 14 specimens and about 1 hour for 1 specimen) in most cases of smear positive samples using ready to use reagents for real time detection of MTB rRNA in clinical samples. New pretreatment and extraction reagents kits to increase the stability of the sputum RNA and the extraction efficiency are now tested in our laboratory.
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Affiliation(s)
- V Drouillon
- Service de microbiologie, hôpital Saint-Louis, 1 avenue Claude-Vellefaux, 75010 Paris, France.
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Affiliation(s)
- Frederique Goutfer-wurmser
- a Laboratoire de Chimie du Solide Minéral - URA CNRS 158 Université Henri Poincaré Nancy I , B.P. 239, 54506 , Vandoeuvre-lès-Nancy Cedex , FRANCE
| | - Claire Herold
- a Laboratoire de Chimie du Solide Minéral - URA CNRS 158 Université Henri Poincaré Nancy I , B.P. 239, 54506 , Vandoeuvre-lès-Nancy Cedex , FRANCE
| | - Jean-Francois Mareche
- a Laboratoire de Chimie du Solide Minéral - URA CNRS 158 Université Henri Poincaré Nancy I , B.P. 239, 54506 , Vandoeuvre-lès-Nancy Cedex , FRANCE
| | - Philippe Lagrange
- a Laboratoire de Chimie du Solide Minéral - URA CNRS 158 Université Henri Poincaré Nancy I , B.P. 239, 54506 , Vandoeuvre-lès-Nancy Cedex , FRANCE
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Affiliation(s)
- Claire Hérold
- a Laboratoire de Chimie du Solide Minéral (URA CNRS 158) Université Henri Poincaré Nancy I , B.P. 239, 54506 , Vandoeuvre-lès-Nancy Cedex , FRANCE
| | - Frédérique Goutfer-Wurmser
- a Laboratoire de Chimie du Solide Minéral (URA CNRS 158) Université Henri Poincaré Nancy I , B.P. 239, 54506 , Vandoeuvre-lès-Nancy Cedex , FRANCE
| | - Jean-François Marěché
- a Laboratoire de Chimie du Solide Minéral (URA CNRS 158) Université Henri Poincaré Nancy I , B.P. 239, 54506 , Vandoeuvre-lès-Nancy Cedex , FRANCE
| | - Philippe Lagrange
- a Laboratoire de Chimie du Solide Minéral (URA CNRS 158) Université Henri Poincaré Nancy I , B.P. 239, 54506 , Vandoeuvre-lès-Nancy Cedex , FRANCE
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Affiliation(s)
| | - B. Rousseau
- a CRMD - UMR 6619 CNRS-Université , 45071 , Orléans Cedex 2 , France
| | - C. Herold
- b LCSM - URA CNRS 156- Université Henri Poincarre Nancy I , BP 239, 54506 , Vandoeuvre-lés-Nancy Cedex , France
| | - P. Lagrange
- b LCSM - URA CNRS 156- Université Henri Poincarre Nancy I , BP 239, 54506 , Vandoeuvre-lés-Nancy Cedex , France
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Goutfer-wurmser F, Herold C, Mareche JF, Lagrange P. Comparison of the Intercalation into Graphite of Phosphorus-Potassium and Mercury-Potassium Binaries. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587250008025471] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Frederique Goutfer-wurmser
- a Laboratoire de Chimie du Solide Mineral (UMR UHP-CNRS 7555) , Université Henri Poincaré Nancy I , B. P. 239, 54506, Vandoeuvre-lès-Nancy , Cedex , France
| | - Claire Herold
- a Laboratoire de Chimie du Solide Mineral (UMR UHP-CNRS 7555) , Université Henri Poincaré Nancy I , B. P. 239, 54506, Vandoeuvre-lès-Nancy , Cedex , France
| | - Jean-François Mareche
- a Laboratoire de Chimie du Solide Mineral (UMR UHP-CNRS 7555) , Université Henri Poincaré Nancy I , B. P. 239, 54506, Vandoeuvre-lès-Nancy , Cedex , France
| | - Philippe Lagrange
- a Laboratoire de Chimie du Solide Mineral (UMR UHP-CNRS 7555) , Université Henri Poincaré Nancy I , B. P. 239, 54506, Vandoeuvre-lès-Nancy , Cedex , France
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Bergeal N, Dubost V, Noat Y, Sacks W, Roditchev D, Emery N, Hérold C, Marêché JF, Lagrange P, Loupias G. Scanning tunneling spectroscopy on the novel superconductor CaC6. Phys Rev Lett 2006; 97:077003. [PMID: 17026267 DOI: 10.1103/physrevlett.97.077003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2006] [Indexed: 05/12/2023]
Abstract
We present scanning tunneling microscopy and spectroscopy of the newly discovered superconductor CaC6. The tunneling conductance spectra, measured between 3 and 15 K, show a clear superconducting gap in the quasiparticle density of states. The gap function extracted from the spectra is in good agreement with the conventional BCS theory with Delta0=1.6+/-0.2 meV. The possibility of gap anisotropy and two-gap superconductivity is also discussed. In a magnetic field, direct imaging of the vortices allows us to deduce a coherence length in the ab plane xiab approximately 33 nm.
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Affiliation(s)
- N Bergeal
- Institut des Nanosciences de Paris, Universités Paris 6 et 7, UMR 7588 au CNRS, 140 rue de Lourmel, 75015 Paris, France
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Kowsar A, Labioche I, Arentz T, Zimmerman M, Georger F, Defaye P, Lagrange P, De Roy L, Blanc P, Boveda S, Virot P. P5-62. Heart Rhythm 2006. [DOI: 10.1016/j.hrthm.2006.02.840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lamura G, Aurino M, Cifariello G, Di Gennaro E, Andreone A, Emery N, Hérold C, Marêché JF, Lagrange P. Experimental evidence of s-wave superconductivity in bulk CaC6. Phys Rev Lett 2006; 96:107008. [PMID: 16605783 DOI: 10.1103/physrevlett.96.107008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2006] [Indexed: 05/08/2023]
Abstract
The temperature dependence of the in-plane magnetic penetration depth, lambda(ab)(T), has been measured in a c-axis oriented polycrystalline CaC(6) bulk sample using a high-resolution mutual inductance technique. A clear exponential behavior of lambda(ab)(T) has been observed at low temperatures, strongly suggesting isotropic s-wave pairing. Data fit using the standard BCS theory yields lambda(ab)(0) = (720 +/- 80) A and delta(0) = (1.79 +/- 0.08) meV. The ratio 2delta(0)/k(B)T(c) = (3.6 +/- 0.2) gives indication for a weakly coupled superconductor.
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Affiliation(s)
- G Lamura
- CNR-INFM Coherentia and Department of Physics, University of Naples, Federico II, I-80125, Napoli, Italy.
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Abstract
Mucosal surfaces of the respiratory tract represent a major portal of entry for most human viruses and a critical component of the mammalian immunologic repertoire. The major antibody isotype in external secretions is secretory immunoglobin A (S-IgA). The major effector cells in mucosal surfaces, however, are not IgA B cells, but T lymphocytes, which may account for up to 80% of the mucosal lymphoid cell population. Mucosal immunoprophylaxis is theoretically an important approach to control infections acquired through these portals. Passive antibodies can protect against mucosal viral infections, as shown for respiratory syncytial virus, but very high quantities of passive antibodies are needed to restrict virus replication on mucosal surface. Factors likely to induce mucosal antibody and cell-mediated immune responses include oral or respiratory routes of immunization and active (effectively replicating) vaccine agents. Very few antiviral vaccines have been developed to protect the mucosal surface of the respiratory tract, and only an attenuated influenza virus vaccine uses the nasal route. Other vaccines, approved for parenteral use, have been administered experimentally by the nasal route; these include active (replicating) and inactive (nonreplicating) vaccines. By this route they induce only a moderate local mucosal response. Neither the development of mucosal immunity nor the administration of vaccines via the mucosal route is essential for control or prevention of most respiratory viral infections and diseases acquired through the respiratory tract. Nonetheless, the example of the live attenuated intranasal influenza vaccine, which induces both systemic and local immune response, is promising for the future of mucosal immunization against respiratory viral infections.
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Affiliation(s)
- F Denis
- Laboratoire de bactériologie-virologie-hygiène, CHU Dupuytren, Limoges.
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Emery N, Hérold C, Lagrange P. Structural study and crystal chemistry of the first stage calcium graphite intercalation compound. J SOLID STATE CHEM 2005. [DOI: 10.1016/j.jssc.2005.05.031] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Emery N, Hérold C, d'Astuto M, Garcia V, Bellin C, Marêché JF, Lagrange P, Loupias G. Superconductivity of bulk CaC6. Phys Rev Lett 2005; 95:087003. [PMID: 16196893 DOI: 10.1103/physrevlett.95.087003] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2005] [Indexed: 05/04/2023]
Abstract
We have obtained bulk samples of the graphite intercalation compound, CaC6, by a novel method of synthesis from highly oriented pyrolytic graphite. The crystal structure has been completely determined showing that it is the only member of the MC6, metal-graphite compounds that has rhombohedral symmetry. We have clearly shown the occurrence of superconductivity in the bulk sample at 11.5 K, using magnetization measurements.
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Affiliation(s)
- N Emery
- Laboratoire de Chimie du Solide Minéral-UMR 7555, Université Henri Poincaré Nancy I, B.P. 239, 54506 Vandoeuvre-lès-Nancy Cedex, France
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Lebrun L, Weill FX, Lafendi L, Houriez F, Casanova F, Gutierrez MC, Ingrand D, Lagrange P, Vincent V, Herrmann JL. Use of the INNO-LiPA-MYCOBACTERIA assay (version 2) for identification of Mycobacterium avium-Mycobacterium intracellulare-Mycobacterium scrofulaceum complex isolates. J Clin Microbiol 2005; 43:2567-74. [PMID: 15956365 PMCID: PMC1151901 DOI: 10.1128/jcm.43.6.2567-2574.2005] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Using INNO-LiPA-MYCOBACTERIA (Lipav1; Innogenetics) and the AccuProbe (Gen-Probe Inc./bioMérieux) techniques, 35 Mycobacterium avium-Mycobacterium intracellulare-Mycobacterium scrofulaceum (MAC/MAIS) complex strains were identified between January 2000 and December 2002. Thirty-four of 35 isolates were positive only for the MAIS complex probe by Lipav1 and were further analyzed by INNO-LiPA-MYCOBACTERIA version 2 (Lipav2), hsp65 PCR restriction pattern analysis (PRA), and ribosomal internal transcribed spacer (ITS), hsp65, and 16S rRNA sequences. Lipav2 identified 14 of 34 strains at the species level, including 11 isolates positive for the newly specific MAC sequevar Mac-A probe (MIN-2 probe). Ten of these 11 isolates corresponded to sequevar Mac-A, which was recently defined as Mycobacterium chimerae sp. nov. Among the last 20 of the 34 MAIS isolates, 17 (by hsp65 PRA) and 18 (by hsp65 sequence) were characterized as M. avium. Ten of the 20 were identified as Mac-U sequevar. All these 20 isolates were identified as M. intracellulare by 16S rRNA sequence except one isolate identified as Mycobacterium paraffinicum by 16S rRNA and ITS sequencing. One isolate out of 35 isolates that was positive for M. avium by AccuProbe and that was Mycobacterium genus probe positive and MAIS probe negative by Lipav1 and Lipav2 might be considered a new species. In conclusion, the new INNO-LiPA-MYCOBACTERIA allowed the identification of 40% of the previously unidentified MAIS isolates at the species level. The results of the Lipav2 assay on the MAIS isolates confirm the great heterogeneity of this group and suggest the use of hsp65 or ITS sequencing for precise identification of such isolates.
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Affiliation(s)
- Léa Lebrun
- Service de Microbiologie, Hôpital Saint Louis, 1 Avenue Claude Vellefaux, 75010 Paris, France
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Abstract
The rate coefficient for the reaction of nitrite with hypochlorite and hypochlorous acid has been studied using spectrophotometric measurements. The reaction rate has been determined in a wide range of H(+) concentration (5< or =-log[H(+)]< or =11). The kinetics were carried out as a function of NO(2)(-), H(+) and total hypochlorite ([HOCl](total)=[HOCl]+[ClO(-)]+[ClNO(2)]) concentrations. The observed overall rate law is described by: -d[HClO](T)dt=[a[NO(2)(-)](2)+b[NO(2)(-)]][H(+)](2)c+d[H(+)]+e[NO(2)(-)][H(+)](2)[HOCl](total)At T=298 K and in Na(2)SO(4) at an ionic strength (I=1.00 M), we obtained using a nonlinear fitting procedure: a=(1.83+/-0.36)x10(7) s(-1), b=(1.14+/-0.23)x10(5) Ms(-1), c=(1.12+/-0.17)x10(-13) M, d=(1.43+/-0.29)x10(-6) M(2) and e=(1.41+/-0.28)x10(3) M where the errors represent 2sigma. According to the overall rate law, a/b=k(1)/k(3), b/e=k(3), c=K(w), d/c=K(a), d=K(a)K(w) and e=K(1)K(a). In Na(2)SO(4) at an ionic strength (I=1.00 M), the values of K(1) and K(a) are (1.1+/-0.1)x10(-4) and 1.28x10(7) M(-1), respectively. A mechanism is proposed for the NO(2)(-) oxidation which involves the reversible initial step: NO(2)(-)+HOCl left harpoon over right harpoon ClNO(2)+OH(-) (K(1)), while ClNO(2) undergoes the two parallel reactions: attack by NO(2)(-) (k(1)) and hydrolysis (k(3)). ClNO(2) and N(2)O(4) are proposed as important intermediates as they control the mechanism. The rate coefficients k(1) and k(3) have been determined at different ionic strengths in NaCl and Na(2)SO(4). The influence of the ionic strength and ionic environment has been studied in this work.
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Affiliation(s)
- Nazafarin Lahoutifard
- Laboratoire de Cinétique et Analyse, ECPM, Université Louis Pasteur de Strasbourg, UMR 7512 au CNRS, 25 rue Becquerel, France.
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Lahoutifard N, Lagrange P, Lagrange J, Scott SL. Kinetics and Mechanism of Nitrite Oxidation by HOBr/BrO- in Atmospheric Water and Comparison with Oxidation by HOCl/ClO-. J Phys Chem A 2002. [DOI: 10.1021/jp021185u] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nazafarin Lahoutifard
- Laboratoire de Cinétique et Analyse, ECPM, Université Louis Pasteur de Strasbourg, UMR 7512 au CNRS, 25 rue Becquerel, 67087 Strasbourg, France, and Department of Chemistry, University of Ottawa, 10, Marie Curie, Ottawa, Ontario, Canada, K1N 6N5
| | - Philippe Lagrange
- Laboratoire de Cinétique et Analyse, ECPM, Université Louis Pasteur de Strasbourg, UMR 7512 au CNRS, 25 rue Becquerel, 67087 Strasbourg, France, and Department of Chemistry, University of Ottawa, 10, Marie Curie, Ottawa, Ontario, Canada, K1N 6N5
| | - Janine Lagrange
- Laboratoire de Cinétique et Analyse, ECPM, Université Louis Pasteur de Strasbourg, UMR 7512 au CNRS, 25 rue Becquerel, 67087 Strasbourg, France, and Department of Chemistry, University of Ottawa, 10, Marie Curie, Ottawa, Ontario, Canada, K1N 6N5
| | - Susannah L. Scott
- Laboratoire de Cinétique et Analyse, ECPM, Université Louis Pasteur de Strasbourg, UMR 7512 au CNRS, 25 rue Becquerel, 67087 Strasbourg, France, and Department of Chemistry, University of Ottawa, 10, Marie Curie, Ottawa, Ontario, Canada, K1N 6N5
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Janier M, Agbalika F, de La Salmonière P, Lassau F, Lagrange P, Morel P. Human herpesvirus 8 seroprevalence in an STD clinic in Paris: a study of 512 patients. Sex Transm Dis 2002; 29:698-702. [PMID: 12438907 DOI: 10.1097/00007435-200211000-00013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Human herpesvirus 8 (HHV-8) is thought to be possibly sexually transmitted in some populations, but few data are available on this mode of transmission. GOAL The goal was to study HHV-8 seroprevalence in patients attending a sexually transmitted disease (STD) clinic and to search for predictive factors of HHV-8 seropositivity. STUDY DESIGN Five hundred twelve consecutive patients attending the STD clinic of Hôpital Saint-Louis (Paris) were tested for HHV-8 antibodies (immunofluorescence assay using two cell lines, BCP-1 and ISI n. butyrate [3 mmol/l]). A standardized questionnaire was used to obtain demographic, behavioral, and clinical data. Predictive factors of HHV-8 seropositivity were considered in univariate and multivariate analysis with use of logistic regression models. RESULTS In testing of the patients for HHV-8 antibodies, 67/512 (13.1%) tested positive: 53/346 (15.3%) of men and 14/166 (8.4%) of women ( = 0.03). The predictive factors of HHV-8 seropositivity for men were the country of origin (Central Africa, odds ratio [OR]: 7.5; North Africa, OR: 5.5), homosexuality (OR: 3.7), and visiting prostitutes (OR: 7.1). For women they were country of origin (Central Africa, OR: 8.3) and presence of HSV-2 antibodies (OR: 6.5, tendency). CONCLUSION Our study does not show clear relationships between HHV-8 seropositivity and sexual behavior, apart from homosexuality, but visiting prostitutes (for men) and HSV-2 seropositivity (for women) could be subtle clues supporting the hypothesis of heterosexual transmission.
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Lagrange P, Pruvost S, Herold C, Mareche JF, Herold A. Structural study of a graphite-lithium-calcium intercalation compound. Acta Crystallogr A 2002. [DOI: 10.1107/s010876730209829x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Pruvost S, Hérold C, Hérold A, Marêché JF, Lagrange P. Un nouveau composé d’intercalation du graphite : une phase lamellaire graphite–lithium–calcium. CR CHIM 2002. [DOI: 10.1016/s1631-0748(02)01415-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Brighli M, Fux P, Lagrange J, Lagrange P. Discussion on the complexing ability of the uranyl ion with several crown ethers and cryptands in water and in propylene carbonate. Inorg Chem 2002. [DOI: 10.1021/ic00195a016] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zare K, Lagrange J, Lagrange P. Study of the mechanism of decomplexation of some vanadium(V), molybdenum(VI), and tungsten(VI) aminocarboxylate complexes. Inorg Chem 2002. [DOI: 10.1021/ic50193a009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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