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Reynbakh O, Garcia M, Romero J, Patel H, Braunstein ED, Fazzari M, Di Biase L. Ablation of atrial fibrillation beyond pulmonary vein isolation: Do additional ablation lesions impact left atrial function? J Cardiovasc Electrophysiol 2023; 34:327-334. [PMID: 36511480 DOI: 10.1111/jce.15780] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/28/2022] [Accepted: 11/14/2022] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Electrical isolation of pulmonary veins (PVI) is a cornerstone for atrial fibrillation (AF) ablation. The overall effect of AF ablation, and especially lesions beyond PVI, on left atrial (LA) function is currently poorly understood. Our aim was to determine if LA function is different in patients after extensive LA ablation compared to PVI only. We performed non-inferiority analysis of LA function after PVI with additional nonpulmonary vein ablation lesions in LA (PVI+) and PVI alone. METHODS We studied 68 patients consecutive patients who underwent AF ablation and who had complete transthoracic echocardiogram (TTE) within 12 months before AF ablation and 1-12 months after the procedure. Patients were stratified into two groups: PVI only and PVI+. Primary outcome was change in LA reservoir strain (LASr). Noninferiority margin was defined at 6%. RESULTS The PVI only group had a higher proportion of patients with paroxysmal AF (70% vs. 30%). The PVI+ group was observed to have a slightly higher increase in LASr compared to PVI alone (5.0% vs. 4.3%, p < .01 for noninferiority). LASr noninferiority was confirmed when adjusted for age, sex, coronary artery disease, hyperlipidemia, and AF type, rhythm at preprocedure TTE in a multivariable linear regression model, 90% CI (-5.46 to 2.04), p < .01. CONCLUSION LA functional improvement evaluated by LASr was noninferior after PVI with additional LA ablation lesions compared to PVI alone. These findings were confirmed when adjusted for confounding clinical variables, suggesting that more extensive ablation does not negatively affect LA function.
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Affiliation(s)
- Olga Reynbakh
- Department of Medicine, Division of Cardiology, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, New York, USA
| | - Mario Garcia
- Department of Medicine, Division of Cardiology, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, New York, USA
| | - Jorge Romero
- Department of Medicine, Division of Cardiology, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, New York, USA
| | - Hardikkumar Patel
- Department of Medicine, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, New York, USA
| | - Eric D Braunstein
- Department of Medicine, Division of Cardiology, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, New York, USA
| | - Melissa Fazzari
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Luigi Di Biase
- Department of Medicine, Division of Cardiology, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, New York, USA
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Roh SY, Ahn J, Lee KN, Baek YS, Kim DH, Lee DI, Shim J, Choi JI, Kim YH. The Impact of Personal Thoracic Impedance on Electrical Cardioversion in Patients with Atrial Arrhythmias. ACTA ACUST UNITED AC 2021; 57:medicina57060618. [PMID: 34199329 PMCID: PMC8231855 DOI: 10.3390/medicina57060618] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/31/2021] [Accepted: 06/11/2021] [Indexed: 11/30/2022]
Abstract
Background and Objectives: Direct current cardioversion (DCCV) is a safe and useful treatment for atrial tachyarrhythmias. In the past, the energy delivered in DCCV was decided upon empirically, based only on the type of tachyarrhythmia. This conventional method does not consider individual factors and may lead to unnecessary electrical damage. Materials and Methods: We performed DCCV in patients with atrial tachyarrhythmias. The impedance and electrical current at the moment of shock were measured. The human thoracic impedance between both defibrillator patches and the electric current that was used were measured. Results: A total of 683 DCCVs were performed on 466 atrial tachyarrhythmia patients. The average impedance was 64 ± 11 Ω and the average successful current was 23 ± 6 mA. The magnitude of the electrical current that was successful depended upon the human impedance (linear regression, B = −0.266, p < 0.001) and the left atrial diameter (B = 0.092, p < 0.001). Impedance was directly proportional to body mass index (BMI) (B = 1.598, p < 0.001) and was higher in females than in males (77 ± 15 Ω vs. 63 ± 11 Ω, p < 0.001). Notably, the high-impedance (>70 Ω) group had a higher BMI (27 ± 4 kg/m2 vs. 25 ± 3 kg/m2, p < 0.001) and a higher proportion of females (37% vs. 9%, p < 0.001) than the low-impedance group (<70 Ω). However, thoracic impedance was not an independent predictor for successful DCCV. Conclusions: Human thoracic impedance was one of the factors that impacted the level of electrical current required for successful DCCV in patients with atrial arrhythmias. In the future, it will be helpful to consider individual predictors, such as BMI and gender, to minimize electrical damage during DCCV.
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Affiliation(s)
- Seung-Young Roh
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul 02841, Korea; (S.-Y.R.); (J.S.); (J.-I.C.)
| | - Jinhee Ahn
- Division of Cardiology, Department of Internal Medicine, Pusan National University Hsopital, Busan 49241, Korea;
| | - Kwang-No Lee
- Division of Cardiology, Department of Internal Medicine, Ajou University Hospital, Suwon 16499, Korea;
| | - Yong-Soo Baek
- Division of Cardiology, Department of Internal Medicine, Inha University hospital, Incheon 22332, Korea;
| | - Dong-Hyeok Kim
- Division of Cardiology, Department of Internal Medicine, Ewha University Hospital, Seoul 07804, Korea;
| | - Dae-In Lee
- Division of Cardiology, Department of Internal Medicine, Chungbuk National University Hospital, Chungju-si 28644, Korea;
| | - Jaemin Shim
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul 02841, Korea; (S.-Y.R.); (J.S.); (J.-I.C.)
| | - Jong-Il Choi
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul 02841, Korea; (S.-Y.R.); (J.S.); (J.-I.C.)
| | - Young-Hoon Kim
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul 02841, Korea; (S.-Y.R.); (J.S.); (J.-I.C.)
- Correspondence:
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Yakabe D, Aso A, Araki M, Murasato Y, Nakamura T. Efficacy of hybrid therapy using prior administration of bepridil hydrochloride and cryoballoon ablation in patients with persistent atrial fibrillation. J Cardiol 2020; 75:360-367. [DOI: 10.1016/j.jjcc.2019.08.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/31/2019] [Accepted: 08/20/2019] [Indexed: 10/26/2022]
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Elkaryoni A, Al Badarin F, Spertus JA, Kennedy KF, Wimmer AP. Comparison of the Effect of Catheter Ablation for Atrial Fibrillation on All-Cause Hospitalization in Patients With Versus Without Heart Failure (from the Nationwide Readmission Database). Am J Cardiol 2020; 125:392-398. [PMID: 31780075 DOI: 10.1016/j.amjcard.2019.10.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 10/15/2019] [Accepted: 10/16/2019] [Indexed: 11/29/2022]
Abstract
Catheter ablation (CA) is associated with reduced arrhythmia recurrence and improved quality of life in patients with atrial fibrillation (AF). Heart failure (HF) is common in patients with AF and is associated with a high hospitalization burden. The real-world association between CA and rates of subsequent hospitalization in patients with AF and HF has not been well studied. Patients who underwent CA for AF during the middle 4 months of each year 2010 to 2015 were identified using the Nationwide Readmission Database. Patients were grouped according to the HF status and HF patients were stratified to reduced versus preserved ejection fraction (EF) using ICD-9 codes. Rates of all-cause hospitalization 120 days before and after index admission were compared using the McNemar's test, before and after matching for baseline characteristics. A total of 10,966 patients met inclusion criteria, including 1,950 with HF. In the HF group, all-cause hospitalization rates changed from 45.8% before CA to 33.2% after (p <0.001). Corresponding rates for non-HF patients were 23.8% and 19.7% (p< 0.001) with a greater relative reduction in hospitalizations seen in the HF group (27.5% vs 17.2%; p value <0.001). The difference in relative reduction persisted after adjustment by propensity score matching. The relative reduction in hospitalization rates was similar in HF patients with reduced and preserved EF with 25.2% and 28.5%, respectively. In conclusion, CA for AF was followed by a significant reduction in all-cause hospitalization rates. Patients with HF, regardless of EF, showed a greater reduction in admissions.
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Affiliation(s)
- Ahmed Elkaryoni
- Division of Internal Medicine, University of Missouri-Kansas City, Kansas City, Missouri
| | - Firas Al Badarin
- Division of Internal Medicine, University of Missouri-Kansas City, Kansas City, Missouri; Division of Cardiovascular Disease, Saint Luke's Mid America Heart Institute, Kansas City, Missouri
| | - John A Spertus
- Division of Internal Medicine, University of Missouri-Kansas City, Kansas City, Missouri; Division of Cardiovascular Disease, Saint Luke's Mid America Heart Institute, Kansas City, Missouri
| | - Kevin F Kennedy
- Division of Cardiovascular Disease, Saint Luke's Mid America Heart Institute, Kansas City, Missouri
| | - Alan P Wimmer
- Division of Internal Medicine, University of Missouri-Kansas City, Kansas City, Missouri; Division of Cardiovascular Disease, Saint Luke's Mid America Heart Institute, Kansas City, Missouri.
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Soulat-Dufour L, Lang S, Ederhy S, Ancedy Y, Beraud AS, Adavane-Scheuble S, Chauvet-Droit M, Hammoudi N, Scheuble A, Nhan P, Charbonnier M, Boccara F, Cohen A. Biatrial remodelling in atrial fibrillation: A three-dimensional and strain echocardiography insight. Arch Cardiovasc Dis 2019; 112:585-593. [PMID: 31540880 DOI: 10.1016/j.acvd.2019.06.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 06/06/2019] [Accepted: 06/08/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND Atrial remodelling has been poorly investigated in atrial fibrillation (AF), and few studies have focused on biatrial remodelling. AIM To evaluate right atrial (RA) and left atrial (LA) remodelling in AF using global atrial reservoir strain and three-dimensional (3D) atrial volumes, according to rhythm outcome at mid-term follow-up. METHODS Two-dimensional and 3D transthoracic echocardiography (TTE) were performed within 24hours after admission (M0) and at 6-month follow-up (M6) in patients admitted for AF. RA and LA variables were assessed: body surface area-indexed maximum 3D volume (Max 3D RA Voli, Max 3D LA Voli) and minimum 3D volume (Min 3D RA Voli, Min 3D LA Voli); atrial emptying fraction (3D RAEF, 3D LAEF); atrial expansion index (3D RAEI, 3D LAEI); and global RA and LA reservoir strain. RESULTS Forty-eight consecutive patients were included prospectively. Three groups were identified depending on rhythm at M0 and M6: AF at M0 and sinus rhythm (SR) at M6 (AF-SR) in 25 (52.1%) patients; AF at M0 and AF at M6 (AF-AF) in 13 (27.1%) patients; and SR at M0 (spontaneous cardioversion before first TTE) and SR at M6 (SR-SR) in 10 (20.8%) patients. Between M0 and M6 in the AF-SR group, we found: significant decreases in Max 3D RA Voli (P=0.020), Min 3D RA Voli (P=0.0008), Max 3D LA Voli (P=0.001) and Min 3D LA Voli (P=0.0021); significant increases in 3D RAEF (P=0.037) and 3D RAEI (P=0.034); no significant differences in 3D LAEF and 3D LAEI; and significant increases in global RA and LA reservoir strain (both P<0.0001). There was no significant difference with regard to these variables in the AF-AF and SR-SR groups. CONCLUSION 3D volume and strain analyses were useful in the evaluation of RA and LA reverse remodelling in successfully cardioverted patients with AF.
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Affiliation(s)
- Laurie Soulat-Dufour
- Service de cardiologie, Sorbonne universités, hôpital Saint-Antoine, hôpitaux de l'Est Parisien, AP-HP, 75012 Paris, France; Unité de recherche sur les maladies cardiovasculaires, du métabolisme et de la nutrition, UMRS-ICAN 1166, Inserm, 75013 Paris, France
| | - Sylvie Lang
- Service de cardiologie, Sorbonne universités, hôpital Saint-Antoine, hôpitaux de l'Est Parisien, AP-HP, 75012 Paris, France
| | - Stephane Ederhy
- Service de cardiologie, Sorbonne universités, hôpital Saint-Antoine, hôpitaux de l'Est Parisien, AP-HP, 75012 Paris, France
| | - Yann Ancedy
- Service de cardiologie, Sorbonne universités, hôpital Saint-Antoine, hôpitaux de l'Est Parisien, AP-HP, 75012 Paris, France
| | | | - Saroumadi Adavane-Scheuble
- Service de cardiologie, Sorbonne universités, hôpital Saint-Antoine, hôpitaux de l'Est Parisien, AP-HP, 75012 Paris, France
| | - Marion Chauvet-Droit
- Service de cardiologie, Sorbonne universités, hôpital Saint-Antoine, hôpitaux de l'Est Parisien, AP-HP, 75012 Paris, France
| | - Nadjib Hammoudi
- Unité de recherche sur les maladies cardiovasculaires, du métabolisme et de la nutrition, UMRS-ICAN 1166, Inserm, 75013 Paris, France; Service de cardiologie, Sorbonne universités, hôpital Pitié-Salpêtrière, 75013 Paris, France
| | | | - Pascal Nhan
- Service de cardiologie, Sorbonne universités, hôpital Saint-Antoine, hôpitaux de l'Est Parisien, AP-HP, 75012 Paris, France
| | - Magali Charbonnier
- Service de cardiologie, Sorbonne universités, hôpital Saint-Antoine, hôpitaux de l'Est Parisien, AP-HP, 75012 Paris, France
| | - Franck Boccara
- Service de cardiologie, Sorbonne universités, hôpital Saint-Antoine, hôpitaux de l'Est Parisien, AP-HP, 75012 Paris, France; Inserm, UMR S 938, centre de recherche Saint-Antoine, 75012 Paris, France
| | - Ariel Cohen
- Service de cardiologie, Sorbonne universités, hôpital Saint-Antoine, hôpitaux de l'Est Parisien, AP-HP, 75012 Paris, France; Unité de recherche sur les maladies cardiovasculaires, du métabolisme et de la nutrition, UMRS-ICAN 1166, Inserm, 75013 Paris, France.
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Karaliute R, Jureviciute J, Jurgaityte J, Stanaitiene G, Mizariene V, Kazakevicius T, Urboniene D, Kavoliuniene A. Relationship of Natriuretic Peptides with Left Atrial Structure and Function within 1 Month after Electrical Cardioversion in Patients with Persistent Atrial Fibrillation. BIOMED RESEARCH INTERNATIONAL 2019; 2019:7636195. [PMID: 31008112 PMCID: PMC6441525 DOI: 10.1155/2019/7636195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 02/17/2019] [Accepted: 02/20/2019] [Indexed: 11/26/2022]
Abstract
Atrial fibrillation (AF) despite the absence of heart failure is related to increased levels of natriuretic peptides (NPs). NPs have not been widely investigated in relation to left atrium (LA) function after sinus rhythm (SR) restoration and duration of AF. The aim of the study was to determine the changes of NPs levels and to define their relation with LA phasic function after electrical cardioversion (ECV). Methods. The study included 48 persistent AF patients with restored SR after ECV. NT-proANP and NT-proBNP were measured for all patients before the ECV. LA phasic function (reservoir, conduit, and pump phases) was assessed using echocardiographic volumetric analysis within the first 24 hours after ECV. Patients were repeatedly tested after 1 month in case of SR maintenance. Results. After 1 month, SR was maintained in 26 (54%) patients. For those patients, NT-proBNP decreased significantly (p=0.0001), whereas NT-proANP tended to decrease (p=0.13). Following 1 month after SR restoration, LA indexed volume decreased (p=0.0001) and all phases of LA function improved (p=<0.01). Patients with AF duration < 3 months had lower NT-proANP compared to patients with AF duration from 6 to 12 months (p = 0.005). Higher NT-proANP concentration before ECV was associated with lower LA reservoir function during the first day after SR restoration (R=-0.456, p=0.005), whereas higher NT-proBNP concentration after 1 month in SR was significantly related to lower LA reservoir function (R=-0.429, p=0.047). Conclusions. LA indexed volume, all phases of LA function, and NT-proBNP levels improved significantly following 1 month of SR restoration. Preliminary results suggest that higher baseline NT-proANP levels and higher NT-proBNP for patients with maintained SR for 1 month are related to lower LA reservoir function. The longer duration of persistent AF is associated with higher NT-proANP concentration.
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Affiliation(s)
- Rasa Karaliute
- Laboratory of Behavioral Medicine, Neuroscience Institute, Medical Academy, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
- Department of Cardiology, Medical Academy, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Justina Jureviciute
- Department of Cardiology, Medical Academy, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Julija Jurgaityte
- Department of Cardiology, Medical Academy, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Giedre Stanaitiene
- Department of Cardiology, Medical Academy, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Vaida Mizariene
- Department of Cardiology, Medical Academy, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Tomas Kazakevicius
- Department of Cardiology, Medical Academy, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Daiva Urboniene
- Department of Laboratory Medicine, Medical Academy, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
| | - Ausra Kavoliuniene
- Department of Cardiology, Medical Academy, Lithuanian University of Health Sciences, Kaunas LT-50161, Lithuania
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Chen X, Liu H, Zhang Y, Wang C, Xu D, Yang B, Ju W, Zhang F, Chen H, Cao K, Chen M. Atrial electromechanical delay assessment in early phase after catheter ablation for patients with atrial fibrillation. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2019; 42:327-332. [PMID: 30632635 DOI: 10.1111/pace.13602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 01/02/2019] [Accepted: 01/06/2019] [Indexed: 11/27/2022]
Abstract
BACKGROUND Variation of atrial electromechanical delay (AED) in early phase after catheter ablation in patients with atrial fibrillation (AF) is lacking. METHODS Fifty-five consecutive patients restored sinus rhythm after ablation was included. Echocardiography was performed at 4 h, 1 day, and 3 days after radiofrequency catheter ablation, and AED was measured simultaneously by echocardiography with pulse Doppler imaging and pulse wave tissue Doppler imaging. RESULTS AED parameters were significantly longer in the nonparoxysmal atrial fibrillation (NPAF) group than in the paroxysmal atrial fibrillation (PAF) group at each checking point after ablation (P < 0.05). Compared with other checking points, AED parameters were significantly longer 4 h postablation in the NPAF group, while no significant difference was found between different checking points in the PAF group. AED-leap, representing the variation of AED in NPAF patients, was significantly positively correlated with the duration of NPAF (r = 0.5291, P = 0.0113). CONCLUSIONS Compared with PAF, NPAF patients have a longer AED postablation, and an abrupt decrease in the initial-h postablation. Such phenomenon gives rise to the different clinical features of PAF and NPAF, and could guide different assessment and treatment strategies for different types of AF.
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Affiliation(s)
- Xiaodong Chen
- Department of Cardiology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.,Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China
| | - Hailei Liu
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yi Zhang
- Department of Cardiology, Shanghai Tenth People's Hospital, Shanghai, China
| | - Chunru Wang
- Department of Cardiology, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.,Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China
| | - Di Xu
- Department of Cardiology, Geriatrics, The First Affiliate Hospital of Nanjing Medical University, Nanjing, China
| | - Bing Yang
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Weizhu Ju
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Fengxiang Zhang
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Hongwu Chen
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Kejiang Cao
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Minglong Chen
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Park HS, Jeong DS, Yu HT, Pak HN, Shim J, Kim JY, Kim J, Lee JM, Kim KH, Roh SY, Cho YJ, Kim YH, Yoon NS. 2018 Korean Guidelines for Catheter Ablation of Atrial Fibrillation: Part I. INTERNATIONAL JOURNAL OF ARRHYTHMIA 2018. [DOI: 10.18501/arrhythmia.2018.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Park K, Park TH, Kim SJ, Cho YR, Park JS, Kim MH, Kim YD. Changes in mitral annular velocities after cardioversion of atrial fibrillation. Echocardiography 2018; 35:1782-1787. [PMID: 30225938 DOI: 10.1111/echo.14139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 08/16/2018] [Accepted: 08/26/2018] [Indexed: 12/28/2022] Open
Abstract
AIMS The early diastolic mitral annular velocity (e') and mitral E/e' criteria for clinically evaluating diastolic dysfunction in patients with atrial fibrillation (AF) are almost the same as in patients with sinus rhythm. In this study, we aimed to investigate whether e' is useful to assess diastolic function in AF patients. METHODS Thirty patients who underwent successful electric cardioversion (EC) due to persistent AF and who maintained sinus rhythm for 1 month after EC were enrolled in this study. Transthoracic echocardiography was performed on all patients before and 1 month after EC. Standard diastolic parameters, the global longitudinal strain (GLS), and left ventricular (LV) twist were measured. RESULTS Conventional Doppler parameters measured before EC were not significantly different from 1 month after EC. However, the lateral and septal e' were significantly decreased 1 month after EC (from 12.8 ± 2.5 to 9.8 ± 2.3 cm/s and from 9.5 ± 1.9 to 7.1 ± 1.5 cm/s, respectively, P < 0.001). Likewise, the lateral and septal E/e' were also significantly increased 1 month after EC (P < 0.001). The GLS was significantly improved from -15.9 ± 2.2% to -19.4 ± 2.4% after EC (P < 0.001), as was the LV twist (from 5.8 ± 1.7° to 9.1 ± 2.4°, P < 0.001). CONCLUSION We demonstrated that e' was significantly higher in AF compared with during sinus rhythm in the same patients. Thus, in AF patients, diastolic dysfunction should be suspected even when e' values are normal.
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Affiliation(s)
- Kyungil Park
- Department of Cardiology, Dong-A University Hospital, Busan, Korea
| | - Tae-Ho Park
- Department of Cardiology, Dong-A University Hospital, Busan, Korea
| | - Soo-Jin Kim
- Department of Cardiology, Dong-A University Hospital, Busan, Korea
| | - Young-Rak Cho
- Department of Cardiology, Dong-A University Hospital, Busan, Korea
| | - Jong-Sung Park
- Department of Cardiology, Dong-A University Hospital, Busan, Korea
| | - Moo-Hyun Kim
- Department of Cardiology, Dong-A University Hospital, Busan, Korea
| | - Young-Dae Kim
- Department of Cardiology, Dong-A University Hospital, Busan, Korea
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Left atrial compliance: an overlooked predictor of clinical outcome in patients with mitral stenosis or atrial fibrillation undergoing invasive management. ADVANCES IN INTERVENTIONAL CARDIOLOGY 2018; 14:120-127. [PMID: 30008763 PMCID: PMC6041835 DOI: 10.5114/aic.2018.76402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 04/29/2018] [Indexed: 01/06/2023] Open
Abstract
In the assessment of cardiovascular disease, the clinical significance of left atrial (LA) pressure-volume relations has largely been overlooked in contrast to left ventricular (LV) compliance. However, LA compliance has recently gained more attention. Net atrioventricular compliance (Cn), a joint measure of LA and LV compliance, can be calculated non-invasively by a previously validated method using parameters from standard echocardiography. Compliance measurement may be of relevance in selected clinical settings. First, subjects with low Cn are more likely to have their mitral valve area overestimated by the traditional mitral pressure half-time method. Consequently, low Cn in mitral stenosis, usually resulting from reduced LA compliance, can be mistaken for mild mitral stenosis. Second, low Cn independently predicted pulmonary hypertension and disease progression in medically treated mitral stenosis, and late cardiovascular complications after successful percutaneous mitral valvuloplasty. Decreased LA compliance also accounts for stiff LA syndrome, a rare complication of radiofrequency catheter ablation for atrial fibrillation, manifesting as otherwise unexplained heart failure with elevated LA pressure and pulmonary hypertension. Finally, depressed pre-ablation LA stiffness index, i.e. the ratio of the change in LA pressure to the corresponding change in LA volume during passive LA filling, was an independent predictor of arrhythmia recurrence. Thus, LA stiffening translates into adverse clinical outcomes in patients with mitral stenosis or atrial fibrillation undergoing interventional procedures. Whether reduced LA compliance after LA appendage occlusion can result in the LA stiff syndrome, has not been reported so far.
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Kim YG, Choi JI, Kim MN, Cho DH, Oh SK, Kook H, Park HS, Lee KN, Baek YS, Roh SY, Shim J, Park SM, Shim WJ, Kim YH. Non-vitamin K antagonist oral anticoagulants versus warfarin for the prevention of spontaneous echo-contrast and thrombus in patients with atrial fibrillation or flutter undergoing cardioversion: A trans-esophageal echocardiography study. PLoS One 2018; 13:e0191648. [PMID: 29360845 PMCID: PMC5779688 DOI: 10.1371/journal.pone.0191648] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 01/09/2018] [Indexed: 11/19/2022] Open
Abstract
Spontaneous echo-contrast (SEC) and thrombus observed in trans-esophageal echocardiography (TEE) is known as a strong surrogate marker for future risk of ischemic stroke in patients with atrial fibrillation (AF) or atrial flutter (AFL). The efficacy of non-vitamin K antagonist oral anticoagulants (NOAC) compared to warfarin to prevent SEC or thrombus in patients with AF or AFL is currently unknown. AF or AFL patients who underwent direct current cardioversion (DCCV) and pre-DCCV TEE evaluation from January 2014 to October 2016 in a single center were analyzed. The prevalence of SEC and thrombus were compared between patients who received NOAC and those who took warfarin. NOAC included direct thrombin inhibitor and factor Xa inhibitors. Among 1,050 patients who were considered for DCCV, 424 patients anticoagulated with warfarin or NOAC underwent TEE prior to DCCV. Eighty patients who were anticoagulated for less than 21 days were excluded. Finally, 344 patients were included for the analysis (180 warfarin users vs. 164 NOAC users). No significant difference in the prevalence of SEC (44.4% vs. 43.9%; p = 0.919), dense SEC (13.9% vs. 15.2%; p = 0.722), or thrombus (2.2% vs. 4.3%; p = 0.281) was observed between the warfarin group and the NOAC group. In multivariate analysis, there was no association between NOAC and risk of SEC (odds ratio [OR]: 1.4, 95% CI: 0.796–2.297, p = 0.265) or thrombus (OR: 3.4, 95% CI: 0.726–16.039, p = 0.120). In conclusion, effectiveness of NOAC is comparable to warfarin in preventing SEC and thrombus in patients with AF or AFL undergoing DCCV. However, numerical increase in the prevalence of thrombus in NOAC group warrants further evaluation.
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Affiliation(s)
- Yun Gi Kim
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Jong-Il Choi
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
- * E-mail:
| | - Mi-Na Kim
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Dong-Hyuk Cho
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Suk-Kyu Oh
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Hyungdon Kook
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Hee-Soon Park
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Kwang No Lee
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Yong-Soo Baek
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Seung-Young Roh
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Jaemin Shim
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Seong-Mi Park
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Wan Joo Shim
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
| | - Young-Hoon Kim
- Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine and Korea University Medical Center, Seoul, Republic of Korea
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12
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Jazayeri MA, Vanga SR, Vuddanda V, Turagam M, Parikh V, Lavu M, Bommana S, Atkins D, Nath J, Rosamond T, Vacek J, Madhu Reddy Y, Lakkireddy D. Impact of Radiofrequency Ablation of Atrial Fibrillation on Pulmonary Vein Cross Sectional Area: Implications for the Diagnosis of Pulmonary Vein Stenosis. J Atr Fibrillation 2017; 10:1531. [PMID: 29250220 DOI: 10.4022/jafib.1531] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 02/19/2017] [Accepted: 06/14/2017] [Indexed: 11/10/2022]
Abstract
Introduction Restoration of normal sinus rhythm by radiofrequency ablation (RFA) in atrial fibrillation (AF) patients can result in a reduction of left atrial (LA) volume and pulmonary vein (PV) dimensions. It is not clear if this PV size reduction represents a secondary effect of overall LA volume reduction or true PV stenosis. We assessed the relationship between LA volume reduction and PV orifice area pre- and post-RFA. Methods A retrospective cohort study was conducted at a tertiary care academic hospital. Pre- and post-RFA cardiac computed tomography (CT) studies of 100 consecutive AF patients were reviewed. Studies identifying obvious segmental PV narrowing were excluded. Left atrial volumes and PV orifice cross-sectional areas (PVOCA) were measured using proprietary software from the CT scanner vendor (GE Healthcare, Waukesha, WI). Results The cohort had a mean age of 60 ± 8 years, 73% were male, and 90% were Caucasian. Non-paroxysmal AF was present in 76% of patients with a mean duration from diagnosis to RFA of 55 ± 54 months. Mean procedural time was 244 ± 70 min. AF recurred in 27% at 3 month follow-up. Pre-RFA LA volumes were 132 ± 60 ml and mean PVOCA was 2.89 ± 2.32 cm2. In patients with successful ablation, mean LA volume decreased by 10% and PVOCA decreased by 21%. PVOCA was significantly reduced in patients with successful RFA compared to those who had recurrence (2.18 ± 1.12 vs. 2.8 ± 1.9 cm2, p = 0.04) but reduction in LA volume between groups was not significant (118 ± 42 vs. 133 ± 54 ml, p=0.15). Conclusions The study demonstrates that both PV orifice dimensions and LA volume are reduced after successful AF ablation. These data warrant a reassessment of criteria for diagnosing PV stenosis based on changes in PV caliber alone, ideally incorporating LA volume changes.
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Affiliation(s)
- Mohammad-Ali Jazayeri
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - Subba Reddy Vanga
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - Venkat Vuddanda
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - Mohit Turagam
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - Valay Parikh
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - Madhav Lavu
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - Sudharani Bommana
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - Donita Atkins
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - Jayant Nath
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - Thomas Rosamond
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - James Vacek
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - Y Madhu Reddy
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
| | - Dhanunjaya Lakkireddy
- Division of Cardiovascular Diseases, Cardiovascular Research Institute, Mid America Cardiology, University of Kansas Hospital & Medical Center, Kansas City, KS, USA
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13
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Fujimoto Y, Yodogawa K, Takahashi K, Tsuboi I, Hayashi H, Uetake S, Iwasaki YK, Hayashi M, Miyauchi Y, Shimizu W. Noninvasive evaluation of reverse atrial remodeling after catheter ablation of atrial fibrillation by P wave dispersion. Heart Vessels 2017. [PMID: 28631077 DOI: 10.1007/s00380-017-1008-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Atrial fibrillation (AF) itself creates structural and electrophysiological changes such as atrial enlargement, shortening of refractory period and decrease in conduction velocity, called "atrial remodeling", promoting its persistence. Although the remodeling process is considered to be reversible, it has not been elucidated in detail. The aim of this study was to assess the feasibility of P wave dispersion in the assessment of reverse atrial remodeling following catheter ablation of AF. Consecutive 126 patients (88 males, age 63.0 ± 10.4 years) who underwent catheter ablation for paroxysmal AF were investigated. P wave dispersion was calculated from the 12 lead ECG before, 1 day, 1 month, 3 months and 6 months after the procedure. Left atrial diameter (LAD), left atrial volume index (LAVI), left ventricular ejection fraction (LVEF), transmitral flow velocity waveform (E/A), and tissue Doppler (E/e') on echocardiography, plasma B-type natriuretic peptide (BNP) concentrations, serum creatinine, and estimated glomerular filtration rate (eGFR) were also measured. Of all patients, 103 subjects remained free of AF for 1 year follow-up. In these patients, P wave dispersion was not changed 1 day and 1 month after the procedure. However, it was significantly decreased at 3 and 6 months (50.1 ± 14.8 to 45.4 ± 14.4 ms, p < 0.05, 45.2 ± 9.9 ms, p < 0.05, respectively). Plasma BNP concentrations, LAD and LAVI were decreased (81.1 ± 103.8 to 44.8 ± 38.3 pg/mL, p < 0.05, 38.2 ± 5.7 to 35.9 ± 5.6 mm, p < 0.05, 33.3 ± 14.2 to 29.3 ± 12.3 mL/m2, p < 0.05) at 6 months after the procedure. There were no significant changes in LVEF, E/A, E/e', serum creatinine, and eGFR during the follow up period. P wave dispersion was decreased at 3 and 6 months after catheter ablation in patients without recurrence of AF. P wave dispersion is useful for assessment of reverse remodeling after catheter ablation of AF.
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Affiliation(s)
- Yuhi Fujimoto
- Department of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Kenji Yodogawa
- Department of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan.
| | - Kenta Takahashi
- Department of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Ippei Tsuboi
- Department of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Hiroshi Hayashi
- Department of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Shunsuke Uetake
- Department of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Yu-Ki Iwasaki
- Department of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Meiso Hayashi
- Department of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Yasushi Miyauchi
- Department of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Wataru Shimizu
- Department of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
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14
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Verma I, Tripathi H, Sikachi RR, Agrawal A. Pulmonary Hypertension due to Radiofrequency Catheter Ablation (RFCA) for Atrial Fibrillation: The Lungs, the Atrium or the Ventricle? Heart Lung Circ 2016; 25:1177-1183. [PMID: 27475259 DOI: 10.1016/j.hlc.2016.05.125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 05/21/2016] [Accepted: 05/31/2016] [Indexed: 01/19/2023]
Abstract
Atrial fibrillation is the most common heart rhythm disorder in United States, characterised by rapid and irregular beating of both the atria resulting in the similar ventricular response. While rate and rhythm control using pharmacological regimens remain the primary management strategies in these patients, radiofrequency catheter ablation (RFCA) is rapidly rising as an alternative modality of treatment. Increase in the incidence of RFCA has shed light on complications associated with this procedure. Pulmonary hypertension (PH) is one of the long-term complications that has been observed postcatheter ablation. There have been multiple mechanisms which have been proposed to explain these elevated pulmonary pressures. These include the involvement of the lungs due to pulmonary vein stenosis, pulmonary vein occlusion and, rarely, pulmonary embolism. Radiofrequency catheter ablation can also lead to scarring of the atrium which can cause left atrial diastolic dysfunction leading to elevated pulmonary pressures. Recently, it was also proposed that elevated pulmonary pressure was related to the unmasking of left ventricular diastolic dysfunction occurring after this procedure. In this article, we review all the mechanisms that are associated with the development of pulmonary hypertension in patients undergoing RCFA for atrial fibrillation and the approach to diagnosis and management of such patients.
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Affiliation(s)
- Isha Verma
- Department of Medicine, Monmouth Medical Center, Long Branch, New Jersey, USA
| | - Hemantkumar Tripathi
- Alvin and Lois Lapidus Cancer Institute, Sinai Hospital of Baltimore, Maryland, USA
| | | | - Abhinav Agrawal
- Department of Medicine, Monmouth Medical Center, Long Branch, New Jersey, USA; Northwell Health - Hofstra Northwell School of Medicine Division of Pulmonary, Critical Care & Sleep Medicine, Department of Medicine, New York, USA.
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15
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Yang Y, Liu Q, Wu Z, Li X, Xiao Y, Tu T, Zhou S. Stiff Left Atrial Syndrome: A Complication Undergoing Radiofrequency Catheter Ablation for Atrial Fibrillation. J Cardiovasc Electrophysiol 2016; 27:884-9. [PMID: 26920815 DOI: 10.1111/jce.12966] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Revised: 01/28/2016] [Accepted: 02/15/2016] [Indexed: 11/30/2022]
Abstract
Radiofrequency catheter ablation for atrial fibrillation is an effective approach for treating atrial fibrillation. Its complications have attracted much attention, of which the stiff left atrial syndrome is a recently discovered complication that has not been completely understood. This study aims to investigate the concept, pathologic basis, clinical characteristics, predictors, and treatment protocols of the stiff left atrial syndrome after radiofrequency ablation for atrial fibrillation.
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Affiliation(s)
- Yufan Yang
- Cardiac Catheterization Lab of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Department of Cardiology of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Qiming Liu
- Cardiac Catheterization Lab of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Department of Cardiology of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Zhihong Wu
- Cardiac Catheterization Lab of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Department of Cardiology of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Xuping Li
- Cardiac Catheterization Lab of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Department of Cardiology of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Yichao Xiao
- Cardiac Catheterization Lab of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Department of Cardiology of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Tao Tu
- Cardiac Catheterization Lab of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Department of Cardiology of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Shenghua Zhou
- Cardiac Catheterization Lab of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.,Department of Cardiology of Second Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
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16
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Strachinaru M, Annis C, Catez E, Jousten I, Lutea ML, Pavel O, Morissens M. The mitral annular displacement by two-dimensional speckle tracking: a new tool in evaluating the left atrial function. J Cardiovasc Med (Hagerstown) 2016; 17:344-53. [PMID: 27031582 DOI: 10.2459/jcm.0000000000000346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND The methods used to characterize the volume change and the deformation of the left atrium are highly dependent on technical factors and difficult to use in a clinical environment. The aim of this study was to demonstrate that mitral annular displacement by speckle tracking can be an alternative method to studying the longitudinal left atrial function. METHODS Ninety study participants (54% men), with a mean age of 53(±15) years, underwent a complete echocardiographic examination, comprising two-dimensional, three-dimensional and tissue Doppler imaging (TDI). They were divided into normal individuals (35) and patients having an abnormal echocardiography (55). RESULTS There was a very strong correlation between three-dimensional volumetric function and mitral annular displacement, both for the reservoir (r = 0.78; P < 0.0001) and contractile (r = 0.76; P < 0.0001) functions. The correlation with the longitudinal strain displayed an r = 0.87, P > 0.0001 for the reservoir and r = 0.81, P < 0.0001 for the contractile function. The systolic speed in pulsed TDI and the systolic displacement had an r = 0.83, P < 0.0001. Mitral annular displacement was a very good discriminator for normal versus abnormal participants [area under the curve (AUC) for reservoir = 0.872 and for contractile = 0.843; P < 0.0001], performing less well than three-dimensional (AUC reservoir = 0.892 and contractile = 0.915; P < 0.0001) or deformation (AUC = 0.921 and 0.903 respectively; P < 0.0001), but better than pulsed TDI (AUC = 0.807; P < 0.0001). The percentage error was ±15% for interobserver and ±12% for intraobserver variability. The time taken for displacement analysis was 9 ± 3 s for an experienced cardiologist and 12 ± 4 s for a beginner. CONCLUSION Mitral annular displacement by speckle tracking is a reliable and fast method to evaluate left atrial function. Given the strength of the correlations with strain parameters, it could be used as a surrogate measure of the deformation of left atrium.
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Affiliation(s)
- Mihai Strachinaru
- Cardiology Department, Brugmann University Hospital, Brussels, Belgium
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17
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Hioki M, Matsuo S, Tokutake K, Yokoyama K, Narui R, Ito K, Tanigawa S, Tokuda M, Yamashita S, Anan I, Inada K, Sakuma T, Sugimoto KI, Yoshimura M, Yamane T. Filling defects of the left atrial appendage on multidetector computed tomography: their disappearance following catheter ablation of atrial fibrillation and the detection of LAA thrombi by MDCT. Heart Vessels 2016; 31:2014-2024. [PMID: 26936451 DOI: 10.1007/s00380-016-0819-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 02/19/2016] [Indexed: 01/08/2023]
Abstract
Filling defects of the left atrial appendage (LAA) on multidetector computed tomography (MDCT) are known to occur, not only due to LAA thrombi formation, but also due to the disturbance of blood flow in the LAA of patients with atrial fibrillation (AF). The purpose of this study was to evaluate the impact of the maintenance of sinus rhythm via ablation on the incidence of LAA filling defects on MDCT in patients with AF. A total of 459 consecutive patients were included in the present study. Prior to ablation, MDCT and transesophageal echocardiography (TEE) were performed. AF ablation was performed in patients without LAA thrombi confirmed on TEE. The LAA filling defects were evaluated on MDCT at 3 months after ablation. LAA filling defects were detected on MDCT in 51 patients (11.1 %), among whom the absence of LAA thrombi was confirmed in 42 patients using TEE. The LAA Doppler velocity in patients with LAA filling defects was lower than that of patients without filling defects (0.61 ± 0.19 vs. 0.47 ± 0.21 m/s; P < 0.0001). The sensitivity, specificity and negative predictive value of MDCT in the detection of thrombi were 100, 91 and 100 %, respectively. No LAA filling defects were observed on MDCT at 3 months after ablation in any of the patients, including the patients in whom filling defects were noted prior to the procedure. MDCT is useful for evaluating the presence of LAA thrombi and the blood flow of the LAA. The catheter ablation of AF not only suppresses AF, but also eliminates LAA filling defect on MDCT suggesting the improvement of LAA blood flow.
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Affiliation(s)
- Mika Hioki
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Seiichiro Matsuo
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan.
| | - Kenichi Tokutake
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Kenichi Yokoyama
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Ryohsuke Narui
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Keiichi Ito
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Shinichi Tanigawa
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Michifumi Tokuda
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Seigo Yamashita
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Ikuko Anan
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Keiichi Inada
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Toru Sakuma
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Ken-Ichi Sugimoto
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Michihiro Yoshimura
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
| | - Teiichi Yamane
- Department of Cardiology, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, 105-8461, Japan
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18
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Khurram IM, Maqbool F, Berger RD, Marine JE, Spragg DD, Ashikaga H, Zipunnikov V, Kass DA, Calkins H, Nazarian S, Zimmerman SL. Association Between Left Atrial Stiffness Index and Atrial Fibrillation Recurrence in Patients Undergoing Left Atrial Ablation. Circ Arrhythm Electrophysiol 2016; 9:CIRCEP.115.003163. [DOI: 10.1161/circep.115.003163] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
Atrial fibrillation (AF) is associated with significant abnormalities of left atrial (LA) systolic and diastolic function. This study describes a novel measure, LA stiffness index, that estimates LA diastolic function and its association with clinical outcomes of catheter ablation.
Methods and Results—
A total of 219 AF patients referred for ablation (59% paroxysmal, mean CHA
2
DS
2
VASc score 1.7±1.4) were enrolled. Atrial pressure and volume loops were prepared from invasive pressure measures and cardiac magnetic resonance imaging volumetric data during sinus rhythm for all patients. An LA stiffness index was created, defined by the ratio of change in LA pressure to volume during passive filling of LA (ΔP/ΔV). Patients were followed prospectively. Mean LA stiffness index for AF patients was 0.6±0.5 mm Hg/mL (paroxysmal AF 0.51±0.4 and persistent AF 0.73±0.6;
P
<0.001). Linear regression analysis showed a rise in the stiffness index with age, increasing at a rate of 0.02 mm Hg/mL per year (
P
<0.001). The LA stiffness index was higher in patients with previous LA ablation(s) for AF (0.51±0.35 versus 0.83±0.70;
P
<0.001). Forty of 160 patients had recurrence after AF ablation with a mean follow-up of 10.4±7.6 months. Patients with recurrence had higher stiffness index than those without recurrence (0.83±0.46 versus 0.40±0.22;
P
<0.001).
Conclusions—
LA stiffness index, a novel measure to assess LA diastolic function, increases with age and is higher in persistent AF and in the setting of repeat AF ablation. Greater LA stiffness index was independently associated with recurrence of AF after LA ablation.
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Affiliation(s)
- Irfan M. Khurram
- From the Departments of Cardiology (I.M.K., F.M., R.D.B., J.E.M., D.D.S., H.A., D.A.K., H.C., S.N.) and Radiology and Radiological Sciences (S.L.Z.), The Johns Hopkins University School of Medicine, Baltimore, MD; and Departments of Biostatistics (V.Z.) and Epidemiology (S.N.), Johns Hopkins University, Baltimore, MD
| | - Farhan Maqbool
- From the Departments of Cardiology (I.M.K., F.M., R.D.B., J.E.M., D.D.S., H.A., D.A.K., H.C., S.N.) and Radiology and Radiological Sciences (S.L.Z.), The Johns Hopkins University School of Medicine, Baltimore, MD; and Departments of Biostatistics (V.Z.) and Epidemiology (S.N.), Johns Hopkins University, Baltimore, MD
| | - Ronald D. Berger
- From the Departments of Cardiology (I.M.K., F.M., R.D.B., J.E.M., D.D.S., H.A., D.A.K., H.C., S.N.) and Radiology and Radiological Sciences (S.L.Z.), The Johns Hopkins University School of Medicine, Baltimore, MD; and Departments of Biostatistics (V.Z.) and Epidemiology (S.N.), Johns Hopkins University, Baltimore, MD
| | - Joseph E. Marine
- From the Departments of Cardiology (I.M.K., F.M., R.D.B., J.E.M., D.D.S., H.A., D.A.K., H.C., S.N.) and Radiology and Radiological Sciences (S.L.Z.), The Johns Hopkins University School of Medicine, Baltimore, MD; and Departments of Biostatistics (V.Z.) and Epidemiology (S.N.), Johns Hopkins University, Baltimore, MD
| | - David D. Spragg
- From the Departments of Cardiology (I.M.K., F.M., R.D.B., J.E.M., D.D.S., H.A., D.A.K., H.C., S.N.) and Radiology and Radiological Sciences (S.L.Z.), The Johns Hopkins University School of Medicine, Baltimore, MD; and Departments of Biostatistics (V.Z.) and Epidemiology (S.N.), Johns Hopkins University, Baltimore, MD
| | - Hiroshi Ashikaga
- From the Departments of Cardiology (I.M.K., F.M., R.D.B., J.E.M., D.D.S., H.A., D.A.K., H.C., S.N.) and Radiology and Radiological Sciences (S.L.Z.), The Johns Hopkins University School of Medicine, Baltimore, MD; and Departments of Biostatistics (V.Z.) and Epidemiology (S.N.), Johns Hopkins University, Baltimore, MD
| | - Vadim Zipunnikov
- From the Departments of Cardiology (I.M.K., F.M., R.D.B., J.E.M., D.D.S., H.A., D.A.K., H.C., S.N.) and Radiology and Radiological Sciences (S.L.Z.), The Johns Hopkins University School of Medicine, Baltimore, MD; and Departments of Biostatistics (V.Z.) and Epidemiology (S.N.), Johns Hopkins University, Baltimore, MD
| | - David A. Kass
- From the Departments of Cardiology (I.M.K., F.M., R.D.B., J.E.M., D.D.S., H.A., D.A.K., H.C., S.N.) and Radiology and Radiological Sciences (S.L.Z.), The Johns Hopkins University School of Medicine, Baltimore, MD; and Departments of Biostatistics (V.Z.) and Epidemiology (S.N.), Johns Hopkins University, Baltimore, MD
| | - Hugh Calkins
- From the Departments of Cardiology (I.M.K., F.M., R.D.B., J.E.M., D.D.S., H.A., D.A.K., H.C., S.N.) and Radiology and Radiological Sciences (S.L.Z.), The Johns Hopkins University School of Medicine, Baltimore, MD; and Departments of Biostatistics (V.Z.) and Epidemiology (S.N.), Johns Hopkins University, Baltimore, MD
| | - Saman Nazarian
- From the Departments of Cardiology (I.M.K., F.M., R.D.B., J.E.M., D.D.S., H.A., D.A.K., H.C., S.N.) and Radiology and Radiological Sciences (S.L.Z.), The Johns Hopkins University School of Medicine, Baltimore, MD; and Departments of Biostatistics (V.Z.) and Epidemiology (S.N.), Johns Hopkins University, Baltimore, MD
| | - Stefan L. Zimmerman
- From the Departments of Cardiology (I.M.K., F.M., R.D.B., J.E.M., D.D.S., H.A., D.A.K., H.C., S.N.) and Radiology and Radiological Sciences (S.L.Z.), The Johns Hopkins University School of Medicine, Baltimore, MD; and Departments of Biostatistics (V.Z.) and Epidemiology (S.N.), Johns Hopkins University, Baltimore, MD
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Shrestha S, Chen O, Greene M, John JJ, Greenberg Y, Yang F. Change in P wave morphology after convergent atrial fibrillation ablation. Indian Pacing Electrophysiol J 2016; 16:3-7. [PMID: 27485559 PMCID: PMC4936606 DOI: 10.1016/j.ipej.2016.02.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Convergent atrial fibrillation ablation involves extensive epicardial as well as endocardial ablation of the left atrium. We examined whether it changes the morphology of the surface P wave. We reviewed electrocardiograms of 29 patients who underwent convergent ablation for atrial fibrillation. In leads V1, II and III, we measured P wave duration, area and amplitude before ablation, and at 1, 3 and 6 months from ablation. After ablation, there were no significant changes in P wave amplitude, area, or duration in leads II and III. There was a significant reduction in the area of the terminal negative deflection of the P wave in V1 from 0.38 mm2 to 0.13 mm2 (p = 0.03). There is also an acute increase in the amplitude and duration of the positive component of the P wave in V1 followed by a reduction in both by 6 months. Before ablation, 62.5% of the patients had biphasic P waves in V1. In 6 months, only 39.2% of them had biphasic P waves. Hybrid ablation causes a reduction of the terminal negative deflection of the P wave in V1 as well as temporal changes in the duration and amplitude of the positive component of the P wave in V1. This likely reflects the reduced electrical contribution of the posterior left atrium after ablation as well as anatomical and autonomic remodeling. Recognition of this altered sinus P wave morphology is useful in the diagnosis of atrial arrhythmias in this patient population.
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Affiliation(s)
- Suvash Shrestha
- Department of Internal Medicine, Maimonides Medical Center, Brooklyn, NY, USA.
| | - On Chen
- Department of Cardiology, Maimonides Medical Center, Brooklyn, NY, USA.
| | - Mary Greene
- Department of Cardiology, Maimonides Medical Center, Brooklyn, NY, USA.
| | - Jinu Jacob John
- Department of Cardiology, Maimonides Medical Center, Brooklyn, NY, USA; William Beaumont Hospital, Royal Oak, MI, USA.
| | - Yisachar Greenberg
- Department of Cardiac-electrophysiology, Maimonides Medical Center, Brooklyn, NY, USA.
| | - Felix Yang
- Department of Cardiac-electrophysiology, Maimonides Medical Center, Brooklyn, NY, USA.
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Clauss S, Wakili R, Hildebrand B, Kääb S, Hoster E, Klier I, Martens E, Hanley A, Hanssen H, Halle M, Nickel T. MicroRNAs as Biomarkers for Acute Atrial Remodeling in Marathon Runners (The miRathon Study--A Sub-Study of the Munich Marathon Study). PLoS One 2016; 11:e0148599. [PMID: 26859843 PMCID: PMC4747606 DOI: 10.1371/journal.pone.0148599] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 01/21/2016] [Indexed: 12/01/2022] Open
Abstract
Introduction Physical activity is beneficial for individual health, but endurance sport is associated with the development of arrhythmias like atrial fibrillation. The underlying mechanisms leading to this increased risk are still not fully understood. MicroRNAs are important mediators of proarrhythmogenic remodeling and have potential value as biomarkers in cardiovascular diseases. Therefore, the objective of our study was to determine the value of circulating microRNAs as potential biomarkers for atrial remodeling in marathon runners (miRathon study). Methods 30 marathon runners were recruited into our study and were divided into two age-matched groups depending on the training status: elite (ER, ≥55 km/week, n = 15) and non-elite runners (NER, ≤40 km/week, n = 15). All runners participated in a 10 week training program before the marathon. MiRNA plasma levels were measured at 4 time points: at baseline (V1), after a 10 week training period (V2), immediately after the marathon (V3) and 24h later (V4). Additionally, we obtained clinical data including serum chemistry and echocardiography at each time point. Results MiRNA plasma levels were similar in both groups over time with more pronounced changes in ER. After the marathon miR-30a plasma levels increased significantly in both groups. MiR-1 and miR-133a plasma levels also increased but showed significant changes in ER only. 24h after the marathon plasma levels returned to baseline. MiR-26a decreased significantly after the marathon in elite runners only and miR-29b showed a non-significant decrease over time in both groups. In ER miRNA plasma levels showed a significant correlation with LA diameter, in NER miRNA plasma levels did not correlate with echocardiographic parameters. Conclusion MiRNAs were differentially expressed in the plasma of marathon runners with more pronounced changes in ER. Plasma levels in ER correlate with left atrial diameter suggesting that circulating miRNAs could potentially serve as biomarkers of atrial remodeling in athletes.
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Affiliation(s)
- Sebastian Clauss
- Medizinische Klinik und Poliklinik 1, Campus Grosshadern, Ludwig-Maximilians-Universität München (LMU), Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner site Munich, Munich Heart Alliance, Munich, Germany
- Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA, United States of America
- * E-mail:
| | - Reza Wakili
- Medizinische Klinik und Poliklinik 1, Campus Grosshadern, Ludwig-Maximilians-Universität München (LMU), Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner site Munich, Munich Heart Alliance, Munich, Germany
| | - Bianca Hildebrand
- Medizinische Klinik und Poliklinik 1, Campus Grosshadern, Ludwig-Maximilians-Universität München (LMU), Munich, Germany
| | - Stefan Kääb
- Medizinische Klinik und Poliklinik 1, Campus Grosshadern, Ludwig-Maximilians-Universität München (LMU), Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner site Munich, Munich Heart Alliance, Munich, Germany
| | - Eva Hoster
- Institute for Medical Informatics Biometry and Epidemiology, Ludwig-Maximilians-UniversitätMünchen, Munich, Germany
| | - Ina Klier
- Medizinische Klinik und Poliklinik 1, Campus Grosshadern, Ludwig-Maximilians-Universität München (LMU), Munich, Germany
| | - Eimo Martens
- Medizinische Klinik und Poliklinik 1, Campus Grosshadern, Ludwig-Maximilians-Universität München (LMU), Munich, Germany
| | - Alan Hanley
- Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA, United States of America
| | - Henner Hanssen
- Department of Prevention and Sports Medicine, TechnischeUniversitätMünchen, Klinikumrechts der Isar (MRI), Munich, Germany
- Sports Medicine, Institute of Exercise and Health Sciences, University Basel, Basel, Switzerland
| | - Martin Halle
- DZHK (German Centre for Cardiovascular Research), Partner site Munich, Munich Heart Alliance, Munich, Germany
- Department of Prevention and Sports Medicine, TechnischeUniversitätMünchen, Klinikumrechts der Isar (MRI), Munich, Germany
| | - Thomas Nickel
- Medizinische Klinik und Poliklinik 1, Campus Grosshadern, Ludwig-Maximilians-Universität München (LMU), Munich, Germany
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Ma N, Zhao D, Zhao N, Jiang Z, Ding F, Mei J. Study on Left Atrial Dimension and Function After Modified Endoscopic Procedure for Atrial Fibrillation at Two Years' Follow-Up. Ann Thorac Surg 2015; 101:1724-8. [PMID: 26707004 DOI: 10.1016/j.athoracsur.2015.10.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 09/28/2015] [Accepted: 10/12/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND Modified endoscopic procedures for atrial fibrillation (AF) have a greater success rate because of the increased number of linear lesions. Concerns have been raised about the impact of ablation scars on the left atrium. This study aimed to examine the impact of ablation on left atrial dimension and systolic function after modified endoscopic procedures with echocardiographic measurement. METHODS Of 107 patients undergoing modified endoscopic ablation, 58 had paroxysmal AF and 49 had persistent or long-standing AF. The procedure was performed on the beating heart through three ports on the left chest wall. Three circular and two linear lesions were made on the left atrium. The left atrial appendage was excised by stapler. Echocardiography was performed preoperatively and at the 2-year follow-up. RESULTS Most patients (86.9%) patients were in sinus rhythm (SR) postoperatively. Fourteen patients (5 with paroxysmal AF and 9 with persistent/long-standing AF) failed to maintain SR. Echocardiographic data indicated that the left atrial diameter decreased only in the patients with postoperative SR but continued to increase in patients with fail SR maintenance. Left atrial function was also improved after the procedure, especially in patients with preoperative nonparoxysmal AF or with postoperative SR maintenance. Furthermore, left atrial function in patients who failed to restore SR was not worsened even with left atrial appendage excision. CONCLUSIONS Modified endoscopic procedure for AF improved post-procedural left atrial function of patients with SR maintenance. The left atrial function of patients with failed SR maintenance was also not worsened after left atrial appendage excision.
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Affiliation(s)
- Nan Ma
- Department of Cardiothoracic Surgery, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, PR China
| | - Dongfang Zhao
- Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Naishi Zhao
- Department of Cardiothoracic Surgery, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, PR China
| | - Zhaolei Jiang
- Department of Cardiothoracic Surgery, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, PR China
| | - Fangbao Ding
- Department of Cardiothoracic Surgery, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, PR China
| | - Ju Mei
- Department of Cardiothoracic Surgery, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, PR China.
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Lee A, See VA, Lim TW, Descallar J, Chik W, Ross DL, Thomas SP, Thomas L. Atrial fibrillation ablation by single ring isolation versus wide antral isolation: Effects on left atrial size and function. Int J Cardiol 2015; 206:1-6. [PMID: 26761395 DOI: 10.1016/j.ijcard.2015.12.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 12/06/2015] [Accepted: 12/12/2015] [Indexed: 01/10/2023]
Abstract
BACKGROUND Pulmonary vein isolation (PVI) by single ring isolation (SRI) has been demonstrated to reduce recurrence of atrial fibrillation (AF) compared to the standard technique of wide antral isolation (WAI). In this study, we examine the differential effect of these techniques on left atrial size and function. METHODS We examined left atrial (LA) size (LA maximum and LA minimum volumes) and function (LA emptying fraction and LA expansion index) over a period of 6 months following PVI as measured by transthoracic echocardiography in 187 patients that were enrolled in a randomised controlled trial of SRI vs WAI. RESULTS Compared to pre-ablation, at 6 months post-PVI, there was a small decrease in the LA maximum volume in the WAI group (67.3 vs 62.7 mL, p=0.02). The LA size did not change significantly over 6 months in the SRI group. Patients who underwent SRI had a small reduction in the LA expansion index at 6 months post-PVI compared to baseline (80.6 vs 66.6%, p=0.02). LA function did not change significantly over 6 months in the WAI group. However, at 6 months, there was no difference in any measure of LA size or function between the SRI and WAI groups. CONCLUSIONS SRI, whilst previously demonstrated to be more effective than WAI in preventing AF recurrence, is associated with minimal adverse effects on left atrial function at medium term follow-up despite the isolation of a larger region of LA myocardium.
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Affiliation(s)
- Adam Lee
- Department of Cardiology, Liverpool Hospital, Sydney, Australia
| | - Valerie A See
- Department of Cardiology, Liverpool Hospital, Sydney, Australia
| | - Toon Wei Lim
- Department of Cardiology, Westmead Hospital, Sydney, Australia; Cardiac Department, National University Heart Centre, Singapore
| | - Joseph Descallar
- Ingham Institute, Sydney, Australia; The University of New South Wales, Sydney, Australia
| | - William Chik
- Department of Cardiology, Westmead Hospital, Sydney, Australia; The University of Sydney, Sydney, Australia
| | - David L Ross
- Department of Cardiology, Westmead Hospital, Sydney, Australia; The University of Sydney, Sydney, Australia
| | - Stuart P Thomas
- Department of Cardiology, Westmead Hospital, Sydney, Australia; The University of Sydney, Sydney, Australia
| | - Liza Thomas
- Department of Cardiology, Liverpool Hospital, Sydney, Australia; Department of Cardiology, Westmead Hospital, Sydney, Australia; The University of New South Wales, Sydney, Australia; The University of Sydney, Sydney, Australia.
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Xiong B, Li D, Wang J, Gyawali L, Jing J, Su L. The Effect of Catheter Ablation on Left Atrial Size and Function for Patients with Atrial Fibrillation: An Updated Meta-Analysis. PLoS One 2015; 10:e0129274. [PMID: 26147984 PMCID: PMC4493108 DOI: 10.1371/journal.pone.0129274] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Accepted: 05/06/2015] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Catheter ablation (CA) for atrial fibrillation (AF) is now an important therapeutic modality for patients with AF. However, data regarding changes in left atrial (LA) function after CA have indicated conflicting results depending on the AF types, follow-up period, and the analytical imaging tools. The objective of this review was to analyze the effect of CA on the LA size and function for patients with AF. METHODS We searched for studies regarding LA size and function pre- and post-ablation in PubMed, Embase, the Cochrane Library, and Web of Knowledge through May 2014. LA function was measured by LA ejective fraction (LAEF), LA active ejective fraction (LAAEF), or both. Total and subgroup analyses were implemented using Cochrane Review Manager Version 5.2. Weighted mean differences with 95% confidence intervals were used to express the results of continuous outcomes using fixed or random effect models. I2 was used to calculate heterogeneity. To assess publication bias, Egger's test and Begg's funnel plot were performed using Stata 12.0. RESULTS Twenty-five studies (2040 enrolled patients) were selected for this meta-analysis. The LA diameter (LAD), maximum LA volume, and minimal LA volume were significantly decreased post-ablation, as compared with those at a pre-ablation visit. Compared with the pre-ablation outcomes, we found no significant differences in LAEF/LAAEF at a post-ablation follow-up. Decreases in LA volume and LAEF remained significant post-ablation for paroxysmal AF (PAF); however, the LAEF was insignificant changes in persistent AF (PeAF). Heterogeneity was significant in spite which individual study was excluded. A publication bias was not found. In a meta-regression analysis, we did not find any factor that contributed to the heterogeneity. CONCLUSION With CA, LA volumes and LAD were decreased significantly in patients with AF; LAEF was not significant changes in patients with PeAF but decreased in those with PAF.
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Affiliation(s)
- Bin Xiong
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, The Chongqing Cardiac Arrhythmias Service Center, Chongqing, China
| | - Dan Li
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, The Chongqing Cardiac Arrhythmias Service Center, Chongqing, China
| | - Jianling Wang
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, The Chongqing Cardiac Arrhythmias Service Center, Chongqing, China
| | - Laxman Gyawali
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, The Chongqing Cardiac Arrhythmias Service Center, Chongqing, China
| | - Jinjin Jing
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, The Chongqing Cardiac Arrhythmias Service Center, Chongqing, China
| | - Li Su
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, The Chongqing Cardiac Arrhythmias Service Center, Chongqing, China
- * E-mail:
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Chin JY, Youn HJ. The effect of ablation for paroxysmal atrial fibrillation on left atrial volume and function: a one-year follow-up study. Yonsei Med J 2014; 55:895-903. [PMID: 24954316 PMCID: PMC4075392 DOI: 10.3349/ymj.2014.55.4.895] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
PURPOSE The effect of radiofrequency catheter ablation (RFCA) on left atrial (LA) volume and function in patients with paroxysmal atrial fibrillation (PAF) has not been extensively studied. The aim of this study was to evaluate the long-term impact of RFCA on LA volume and function in patients with PAF. MATERIALS AND METHODS A total of 90 patients with drug-refractory PAF who had sinus rhythm on the initial echocardiogram were examined at baseline, 3 months and 1 year after ablation. We measured LA volume index, LA ejection fraction (LAEF; maximal-minimal LA volume/maximal LA volume), and LA active emptying fraction (LAAEF; mid-diastolic-minimal LA volume/mid-diastolic LA volume). RESULTS After 12±1 months, 78 patients returned, and 61 patients (78%) had sinus rhythm. After 3 months, the LA maximal volume indices decreased (from 33±13 to 28±12 mL/m²; p<0.001). But, LAEF and LAAEF also decreased (from 48±13 to 39±12; p<0.001, from 27±13 to 19±11; p<0.001). After 1 year, LA volumes, LAEF, and LAAEF remained similar at 3 months. In patients without atrial fibrillation (AF) recurrence, LAEF and LAAEF decreased after 3 months (from 50±12 to 40±11; p<0.001, from 29±13 to 22±11; p<0.001) and did not change after 1 year. However, in patients with AF recurrence, those who did not have decreased levels after 3 months had significantly decreased after 1 year (from 43±14 to 34±11; p=0.026, from 22±12 to 15±10; p=0.012). CONCLUSION Successful RFCA of PAF decreased LA volume and function at 3 months. At one year, LA volume and function was remained unchanged in successfully ablated patients whereas LA function in patients with AF recurrence worsened.
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Affiliation(s)
- Jung Yeon Chin
- Division of Cardiology, Eulji University School of Medicine, Daejeon, Korea
| | - Ho-Joong Youn
- Cardiovascular Center, Division of Cardiology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
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Effects of radiofrequency catheter ablation on left ventricular structure and function in patients with atrial fibrillation: a meta-analysis. J Interv Card Electrophysiol 2014; 40:137-45. [PMID: 24966021 DOI: 10.1007/s10840-014-9903-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Accepted: 04/11/2014] [Indexed: 01/01/2023]
Abstract
INTRODUCTION Radiofrequency catheter ablation (RFCA) is an effective therapy for atrial fibrillation (AF). This study was designed to investigate the effects of RFCA on left ventricular (LV) structure and function in AF patients. METHODS AND RESULTS A systematic literature search in MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials was performed to identify trials involving changes of LV structure and function in AF patients undergoing RFCA. Effect size was expressed as weighted mean difference (WMD) with 95% confidence interval (CI). LV end-diastolic diameter (LVEDD), LV end-systolic diameter (LVESD), LV end-diastolic volume (LVEDV), LV end-systolic volume (LVESV), and LV ejection fraction (LVEF) were estimated. A total of 21 trials including 1,135 participants were qualified for this meta-analysis. Compared to the baseline values, there were significant decreases in LVEDV (WMD, -6.39 ml; 95%CI, -12.46 to -0.33) and LVESV (WMD, -6.39 ml; 95%CI, -11.35 to -1.42) and a significant improvement in LVEF (WMD, 6.23%; 95%CI, 3.70 to 8.75), but no significant changes were observed in LVEDD (WMD, -0.64 mm; 95%CI, -2.40 to 1.13) and LVESD (WMD, -0.38 mm; 95%CI, -1.32 to 0.56) after RFCA. Subgroup analysis demonstrated that patients with low LVEF (WMD, 11.90%; 95%CI, 9.16 to 14.64) gained more benefits than those with normal LVEF (WMD, 1.56%; 95%CI, 0.38 to 2.74). Besides, patients with chronic AF (WMD, 10.96%; 95%CI, 4.92 to 17.01) improved more than those with paroxysmal AF (WMD, 1.93%; 95%CI, -0.27 to 4.12). CONCLUSIONS RFCA in AF patients could reverse LV structural remodeling and improve LV systolic function, especially in patients with low LVEF and chronic AF.
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Zhuang Y, Yong YH, Chen ML. Updating the evidence for the effect of radiofrequency catheter ablation on left atrial volume and function in patients with atrial fibrillation: a meta-analysis. JRSM Open 2014; 5:2054270414521185. [PMID: 25057380 PMCID: PMC4012673 DOI: 10.1177/2054270414521185] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objectives To systematically review the effects of radiofrequency catheter ablation (RFCA) on left atrial (LA) size, volumes and function in patients with atrial fibrillation (AF). Methods We searched MEDLINE, EMBASE, ScienceDirect, Highwire, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews and the reference lists of retrieved reports in July 2012. Setting China Participants Twenty-six studies (enrolling 1821 patients) were included in the final analysis. Main outcome measures Changes of LA size or volumes and/or function in patients with AF after RFCA. Results Compared to pre-ablation values, there were significant decreases in LA diameter and LA volumes at post-ablation follow-up. However, compared to pre-ablation values, there were no significant differences in LA ejection fraction/LA active emptying fraction and LA strain at post-ablation follow-up. Decreases in LA diameter and LA volumes remained significant in those without AF recurrence but not in those with AF recurrence. LA ejection fraction/LA active emptying fraction did not decrease in patients without AF recurrence, whereas they decreased in patients with AF recurrence. As for LA strain, it seems that LA strain increases in patients without AF recurrence, with less fibrosis and with more LA volumes decrease, but the differences were not significant. Conclusions Successful RFCA in patients with AF significantly decreases LA size and volumes and does not seem to adversely affect LA function.
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Affiliation(s)
- Yan Zhuang
- Intensive Care Unit, Jiangsu Province Hospital of Traditional Chinese Medicine, Nanjing 210029, China
| | - Yong-Hong Yong
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Ming-Long Chen
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
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Toyama K, Yamabe H, Uemura T, Nagayoshi Y, Morihisa K, Koyama J, Kanazawa H, Hoshiyama T, Ogawa H. Analysis of oxidative stress expressed by urinary level of 8-hydroxy-2′-deoxyguanosine and biopyrrin in atrial fibrillation: Effect of sinus rhythm restoration. Int J Cardiol 2013; 168:80-5. [DOI: 10.1016/j.ijcard.2012.09.068] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 05/27/2012] [Accepted: 09/14/2012] [Indexed: 11/24/2022]
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Lo LW, Chen SA. Cardiac Remodeling After Atrial Fibrillation Ablation. J Atr Fibrillation 2013; 6:877. [PMID: 28496861 DOI: 10.4022/jafib.877] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 05/20/2013] [Accepted: 05/27/2013] [Indexed: 11/10/2022]
Abstract
Radiofrequency catheter ablation procedures are considered a reasonable option for patients with symptomatic, drug refractory atrial fibrillation (AF). Ablation procedures have been reported to effectively restore sinus rhythm and provide long-term relief of symptoms. Both electrical and structural remodeling occurs with AF. A reversal of the electrical remodeling develops within 1 week after restoration to sinus rhythm following the catheter ablation. The recovery rate is faster in the right atrium than the left atrium. Reverse structural remodeling takes longer and is still present 2 to 4 months after restoration of sinus rhythm. The left atrial transport function also improves after successful catheter ablation of AF. Left atrial strain surveys from echocardiography are able to identify patients who respond to catheter ablation with significant reverse remodeling after ablation. Pre-procedural delayed enhancement magnetic resonance imaging is also able to determine the degree of atrial fibrosis and is another tool to predict the reverse remodeling after ablation. The remodeling process is complex if recurrence develops after ablation. Recent evidence shows that a combined reverse electrical and structural remodeling occurs after ablation of chronic AF when recurrence is paroxysmal AF. Progressive electrical remodeling without any structural remodeling develops in those with recurrence involving chronic AF. Whether progressive atrial remodeling is the cause or consequence during the recurrence of AF remains obscure and requires further study.
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Affiliation(s)
- Li-Wei Lo
- Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital; Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University
| | - Shih-Ann Chen
- Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital; Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University
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Erdei T, Dénes M, Kardos A, Mihálcz A, Földesi C, Temesvári A, Lengyel M. Could successful cryoballoon ablation of paroxysmal atrial fibrillation prevent progressive left atrial remodeling? Cardiovasc Ultrasound 2012; 10:11. [PMID: 22429696 PMCID: PMC3364153 DOI: 10.1186/1476-7120-10-11] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Accepted: 03/19/2012] [Indexed: 11/10/2022] Open
Abstract
Background Radiofrequency catheter ablation of atrial fibrillation (AF) has been proved to be effective and to prevent progressive left atrial (LA) remodeling. Cryoballoon catheter ablation (CCA), using a different energy source, was developed to simplify the ablation procedure. Our hypothesis was that successful CCA can also prevent progressive LA remodeling. Methods 36 patients selected for their first CCA because of nonvalvular paroxysmal AF had echocardiography before and 3, 6 and 12 months after CCA. LA diameters, volumes (LAV) and LA volume index (LAVI) were evaluated. LA function was assessed by: early diastolic velocities of the mitral annulus (Aasept, Aalat), LA filling fraction (LAFF), LA emptying fraction (LAEF) and the systolic fraction of pulmonary venous flow (PVSF). Detailed left ventricular diastolic function assessment was also performed. Results Excluding recurrences in the first 3-month blanking period, the clinical success rate was 64%. During one-year of follow-up, recurrent atrial arrhythmia was found in 21 patients (58%). In the recurrent group at 12 months after ablation, minimal LAV (38 ± 19 to 44 ± 20 ml; p < 0.05), maximal LAV (73 ± 23 to 81 ± 24 ml; p < 0.05), LAVI (35 ± 10 to 39 ± 11 ml/m2; p = 0.01) and the maximal LA longitudinal diameter (55 ± 5 to 59 ± 6 mm; p < 0.01) had all increased. PVSF (58 ± 9 to 50 ± 10%; p = 0.01) and LAFF (36 ± 7 to 33 ± 8%; p = 0.03) had decreased. In contrast, after successful cryoballoon ablation LA size had not increased and LA function had not declined. In the recurrent group LAEF was significantly lower at baseline and at follow-up visits. Conclusions In patients whose paroxysmal atrial fibrillation recurred within one year after cryoballoon catheter ablation left atrial size had increased and left atrial function had declined. In contrast, successful cryoballoon catheter ablation prevented progressive left atrial remodeling.
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Affiliation(s)
- Tamás Erdei
- Semmelweis University, School of PhD Studies, Budapest, Hungary.
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MASUDA MASAHARU, INOUE KOICHI, IWAKURA KATSUOMI, OKAMURA ATSUNORI, KOYAMA YASUSHI, KIMURA RYUSUKE, TOYOSHIMA YUKO, ITO NORIHISA, KOMURO ISSEI, FUJII KENSHI. The Impact of Atrial Fibrillation Ablation on Left Atrial Function: Association with Baseline Left Atrial Function. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2011; 35:327-34. [DOI: 10.1111/j.1540-8159.2011.03284.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Blume GG, Mcleod CJ, Barnes ME, Seward JB, Pellikka PA, Bastiansen PM, Tsang TSM. Left atrial function: physiology, assessment, and clinical implications. EUROPEAN JOURNAL OF ECHOCARDIOGRAPHY 2011; 12:421-30. [PMID: 21565866 DOI: 10.1093/ejechocard/jeq175] [Citation(s) in RCA: 317] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The interest in the left atrium (LA) has resurged over the recent years. In the early 1980s, multiple studies were conducted to determine the normal values of LA size. Over the past decade, LA size as an imaging biomarker has been consistently shown to be a powerful predictor of outcomes, including major public health problems such as atrial fibrillation, heart failure, stroke, and death. More recently, functional assessment of the LA has been shown to be, at least as, if not more robust, a marker of cardiovascular outcomes. Current available data suggest that the combined evaluation of LA size and LA function will augment prognostication. The aim of this review is to provide a critical appraisal of current echocardiographic techniques for the assessment of LA function and the implications of such assessment for prediction and disease prevention.
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Affiliation(s)
- Gustavo G Blume
- Division of Cardiovascular Diseases and Internal Medicine, Mayo Clinic, Rochester, MN, USA
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Left Atrial Function: Doppler and Strain. CURRENT CARDIOVASCULAR IMAGING REPORTS 2010. [DOI: 10.1007/s12410-010-9041-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Meta-analysis of the effect of radiofrequency catheter ablation on left atrial size, volumes and function in patients with atrial fibrillation. Am J Cardiol 2010; 105:1317-26. [PMID: 20403486 DOI: 10.1016/j.amjcard.2009.12.046] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Revised: 12/14/2009] [Accepted: 12/14/2009] [Indexed: 11/24/2022]
Abstract
The effects of radiofrequency catheter ablation (RFCA) on left atrial (LA) size, volumes, and function in patients with atrial fibrillation (AF) are not well understood. The aim of this study was to systematically review the effects of RFCA on LA size, volumes, and function in patients with AF. Medline, the Web of Science, the Cochrane Central Register of Controlled Trials, and the reference lists of retrieved reports were searched for relevant studies through April 2009. Studies conducted in patients with AF were included if their primary outcomes were changes in LA size or volumes and/or function before and after RFCA. Weighted mean differences for changes in LA diameter, LA maximum volume, LA minimum volume, LA ejection fraction, and LA active emptying fraction were estimated using fixed- and random-effects meta-analyses. Seventeen relevant studies (enrolling 869 patients) among 192 identified studies were included in the final analysis. Compared to preablation values, there were significant decreases in LA diameter and LA volumes at postablation follow-up. However, compared to preablation values, there were no significant differences in LA ejection fraction and LA active emptying fraction at postablation follow-up. Decreases in LA diameter and LA volumes remained significant in those without AF recurrence but not in those with AF recurrence. LA ejection fraction and LA active emptying fraction did not decrease in patients without AF recurrence, whereas they decreased in patients with AF recurrence. In conclusion, successful RFCA in patients with AF significantly decreases LA size and volumes and does not seem to adversely affect LA function.
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Li C, Ding X, Zhang J, Zhou C, Chen Y, Rao L. Does the E/e′ Index Predict the Maintenance of Sinus Rhythm after Catheter Ablation of Atrial Fibrillation? Echocardiography 2010; 27:630-6. [DOI: 10.1111/j.1540-8175.2009.01123.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Park JH, Park SW, Kim JY, Kim SK, Jeoung B, Lee MH, Hwang C, Kim YH, Kim SS, Pak HN. Characteristics of Complex Fractionated Atrial Electrogram in the Electroanatomically Remodeled Left Atrium of Patients With Atrial Fibrillation. Circ J 2010; 74:1557-63. [DOI: 10.1253/circj.cj-10-0048] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | | | | | | | - Chun Hwang
- Krannert Heart Institute , Indianapolis University
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