1
|
Liu D, Han X, Zhang Z, Tse G, Shao Q, Liu T. Role of Heat Shock Proteins in Atrial Fibrillation: From Molecular Mechanisms to Diagnostic and Therapeutic Opportunities. Cells 2022; 12:cells12010151. [PMID: 36611952 PMCID: PMC9818491 DOI: 10.3390/cells12010151] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/22/2022] [Accepted: 12/27/2022] [Indexed: 01/04/2023] Open
Abstract
Heat shock proteins (HSPs) are endogenous protective proteins and biomarkers of cell stress response, of which examples are HSP70, HSP60, HSP90, and small HSPs (HSPB). HSPs protect cells and organs, especially the cardiovascular system, against harmful and cytotoxic conditions. More recent attention has focused on the roles of HSPs in the irreversible remodeling of atrial fibrillation (AF), which is the most common arrhythmia in clinical practice and a significant contributor to mortality. In this review, we investigated the relationship between HSPs and atrial remodeling mechanisms in AF. PubMed was searched for studies using the terms "Heat Shock Proteins" and "Atrial Fibrillation" and their relevant abbreviations up to 10 July 2022. The results showed that HSPs have cytoprotective roles in atrial cardiomyocytes during AF by promoting reverse electrical and structural remodeling. Heat shock response (HSR) exhaustion, followed by low levels of HSPs, causes proteostasis derailment in cardiomyocytes, which is the basis of AF. Furthermore, potential implications of HSPs in the management of AF are discussed in detail. HSPs represent reliable biomarkers for predicting and staging AF. HSP inducers may serve as novel therapeutic modalities in postoperative AF. HSP induction, either by geranylgeranylacetone (GGA) or by other compounds presently in development, may therefore be an interesting new approach for upstream therapy for AF, a strategy that aims to prevent AF whilst minimizing the ventricular proarrhythmic risks of traditional anti-arrhythmic agents.
Collapse
Affiliation(s)
- Daiqi Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China
| | - Xuyao Han
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China
| | - Zhiwei Zhang
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China
| | - Gary Tse
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China
- Cardiac Electrophysiology Unit, Cardiovascular Analytics Group, Hong Kong, China
- Kent and Medway Medical School, Canterbury CT2 7NZ, UK
| | - Qingmiao Shao
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China
- Correspondence: (Q.S.); or (T.L.)
| | - Tong Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China
- Correspondence: (Q.S.); or (T.L.)
| |
Collapse
|
2
|
Erküner Ö, Dudink EA, Nieuwlaat R, Rienstra M, Van Gelder IC, Camm AJ, Capucci A, Breithardt G, LeHeuzey JY, Lip GY, Crijns HJ, Luermans JG. Effect of Systemic Hypertension With Versus Without Left Ventricular Hypertrophy on the Progression of Atrial Fibrillation (from the Euro Heart Survey). Am J Cardiol 2018; 122:578-583. [PMID: 29958714 DOI: 10.1016/j.amjcard.2018.04.053] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/17/2018] [Accepted: 04/19/2018] [Indexed: 11/26/2022]
Abstract
Hypertension is a risk factor for both progression of atrial fibrillation (AF) and development of AF-related complications, that is major adverse cardiac and cerebrovascular events (MACCE). It is unknown whether left ventricular hypertrophy (LVH) as a consequence of hypertension is also a risk factor for both these end points. We aimed to assess this in low-risk AF patients, also assessing gender-related differences. We included 799 patients from the Euro Heart Survey with nonvalvular AF and a baseline echocardiogram. Patients with and without hypertension were included. End points after 1 year were occurrence of AF progression, that is paroxysmal AF becoming persistent and/or permanent AF, and MACCE. Echocardiographic LVH was present in 33% of 379 hypertensive patients. AF progression after 1 year occurred in 10.2% of 373 patients with rhythm follow-up. In hypertensive patients with LVH, AF progression occurred more frequently as compared with hypertensive patients without LVH (23.3% vs 8.8%, p = 0.011). In hypertensive AF patients, LVH was the most important multivariably adjusted determinant of AF progression on multivariable logistic regression (odds ratio 4.84, 95% confidence interval 1.70 to 13.78, p = 0.003). This effect was only seen in male patients (27.5% vs 5.8%, p = 0.002), while in female hypertensive patients, no differences were found in AF progression rates regarding the presence or absence of LVH (15.2% vs 15.0%, p = 0.999). No differences were seen in MACCE for hypertensive patients with and without LVH. In conclusion, in men with hypertension, LVH is associated with AF progression. This association seems to be absent in hypertensive women.
Collapse
|
3
|
Im SII, Chun KJ, Park SJ, Park KM, Kim JS, On YK. Long-term Prognosis of Paroxysmal Atrial Fibrillation and Predictors for Progression to Persistnt or Chronic Atrial Fibrillation in the Korean Population. J Korean Med Sci 2015; 30:895-902. [PMID: 26130952 PMCID: PMC4479943 DOI: 10.3346/jkms.2015.30.7.895] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 02/17/2015] [Indexed: 11/20/2022] Open
Abstract
Little is known about the long-term prognosis of or predictors for the different clinical types of atrial fibrillation (AF) in Korean populations. The aim of this study was to validate a risk stratification to assess the probability of AF progression from paroxysmal AF (PAF) to persistent AF (PeAF) or permanent AF. A total of 434 patients with PAF were consecutively enrolled (mean age; 71.7 ± 10.7 yr, 60.6% male). PeAF was defined as episodes that are sustained > 7 days and not self-terminating, while permanent AF was defined as an ongoing long-term episode. Atrial arrhythmia during follow-up was defined as atrial premature complex, atrial tachycardia, and atrial flutter. During a mean follow-up of 72.7 ± 58.3 months, 168 patients (38.7%) with PAF progressed to PeAF or permanent AF. The mean annual AF progression was 10.7% per year. In univariate analysis, age at diagnosis, body mass index, atrial arrhythmia during follow-up, left ventricular ejection fraction, concentric left ventricular hypertrophy, left atrial diameter (LAD), and severe mitral regurgitation (MR) were significantly associated with AF progression. In multivariate analysis, age at diagnosis (P = 0.009), atrial arrhythmia during follow-up (P = 0.015), LAD (P = 0.002) and MR grade (P = 0.026) were independent risk factors for AF progression. Patients with younger age at diagnosis, atrial arrhythmia during follow-up, larger left atrial chamber size, and severe MR grade are more likely to progress to PeAF or permanent AF, suggesting more intensive medical therapy with close clinical follow-up would be required in those patients.
Collapse
Affiliation(s)
- Sung II Im
- Division of Cardiology, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan, Korea
| | - Kwang Jin Chun
- Division of Cardiology, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seung-Jung Park
- Division of Cardiology, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Kyoung-Min Park
- Division of Cardiology, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - June Soo Kim
- Division of Cardiology, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Young Keun On
- Division of Cardiology, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| |
Collapse
|
4
|
Catheter Ablation for Atrial Fibrillation: A Review of the Literature. PROCEEDINGS OF SINGAPORE HEALTHCARE 2015. [DOI: 10.1177/201010581502400103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Atrial fibrillation (AF) is the most frequent arrhythmia seen in clinical practice. The incidence of persistent and permanent AF will likely continue to increase as the population ages and as patients with structural heart disease live longer. Until recently, antiarrhythmic medications have been the only commonly employed treatment for maintaining sinus rhythm. However, antiarrhythmic medications have a modest long-term efficacy and the potential for serious side effects. Radiofrequency (RF) catheter ablation is now emerging as a viable alternative to antiarrhythmic medications in maintaining sinus rhythm in patients with AF. A number of different ablation strategies have been used including pulmonary vein isolation, targeting of fractionated electrograms, compartmentalising the atria with linear lesions and various combinations and modifications of these lesion sets. The variation in success within and between techniques suggests that the optimal ablation technique for AF is unclear. The general consensus for patients with paroxysmal atrial fibrillation is to achieve electrical isolation of the pulmonary veins (PVs). In patients with non-paroxysmal AF, PV isolation alone appears to be insufficient. In addition, the structural and electrophysiological changes that have typically occurred at the advanced stage of AF lend greater importance to the identification and ablation of atrial myocardial substrate-driven “sources”. Further efforts are needed to develop better techniques and tools to safely, effectively, and permanently isolate the pulmonary veins, to identify which sites are critical to the maintenance of AF, and to create durable lesions to interrupt intra-arterial reentry. In this review, the rationale and outcomes of rhythm management with drugs and ablation strategies targeting various mechanisms of AF based on our current understanding are discussed.
Collapse
|
5
|
Vizzardi E, Curnis A, Latini MG, Salghetti F, Rocco E, Lupi L, Rovetta R, Quinzani F, Bonadei I, Bontempi L, D'Aloia A, Dei Cas L. Risk factors for atrial fibrillation recurrence: a literature review. J Cardiovasc Med (Hagerstown) 2014; 15:235-53. [PMID: 23114271 DOI: 10.2459/jcm.0b013e328358554b] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Atrial fibrillation is the most common arrhythmia managed in clinical practice and it is associated with an increased risk of mortality, stroke and peripheral embolism. Unfortunately, the incidence of atrial fibrillation recurrence ranges from 40 to 50%, despite the attempts of electrical cardioversion and the administration of antiarrhythmic drugs. In this review, the literature data about predictors of atrial fibrillation recurrence are highlighted, with special regard to clinical, therapeutic, biochemical, ECG and echocardiographic parameters after electrical cardioversion and ablation. Identifying predictors of success in maintaining sinus rhythm after cardioversion or ablation may allow a better selection of patients to undergo these procedures. The aim is to reduce healthcare costs and avoid exposing patients to unnecessary procedures and related complications. Recurrent atrial fibrillation depends on a combination of several parameters and each patient should be individually assessed for such a risk of recurrence.
Collapse
Affiliation(s)
- Enrico Vizzardi
- Department of Experimental and Applied Medicine, University of Brescia, Brescia, Italy
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Wasmer K, Breithardt G, Eckardt L. The young patient with asymptomatic atrial fibrillation: what is the evidence to leave the arrhythmia untreated? Eur Heart J 2014; 35:1439-47. [DOI: 10.1093/eurheartj/ehu113] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
7
|
Pokushalov E, Romanov A, De Melis M, Artyomenko S, Baranova V, Losik D, Bairamova S, Karaskov A, Mittal S, Steinberg JS. Progression of atrial fibrillation after a failed initial ablation procedure in patients with paroxysmal atrial fibrillation: a randomized comparison of drug therapy versus reablation. Circ Arrhythm Electrophysiol 2013; 6:754-60. [PMID: 23748210 DOI: 10.1161/circep.113.000495] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The aim of this prospective randomized study was to assess whether an early reablation was superior to antiarrhythmic drug (AAD) therapy in patients with previous failed pulmonary vein isolation. METHODS AND RESULTS Patients with paroxysmal atrial fibrillation (AF) eligible for AAD therapy or reablation after a previously failed initial pulmonary vein isolation procedure were eligible for this study and were followed up for 3 years to assess rhythm by means of an implanted cardiac monitor. After the blanking period postablation, 154 patients had symptomatic AF recurrences and were randomized to AAD (n=77) or repulmonary vein isolation (n=77). At the end of follow-up, 61 (79%) patients in the AAD group and 19 (25%) patients in the reablation group demonstrated AF% progression (P<0.01). The AF% at 36 months was significantly greater in the AAD group compared with patients in the reablation group (18.8±11.4% versus 5.6±9.5%, respectively; P<0.01). In addition, 18 (23%) patients in the AAD group and 3 (4%) patients in the reablation group progressed to persistent AF (P<0.01). Furthermore, 45 (58%) of the 77 reablation group patients were free of AF/atrial tachycardia on no AADs; in contrast, in the AAD group, only 9 (12%) of the 77 patients were free of AF/atrial tachycardia (P<0.01) throughout follow-up. CONCLUSIONS Redo AF ablation was substantially more effective than AAD in reducing the progression and prevalence of AF after the failure of an initial ablation. CLINICAL TRIAL REGISTRATION URL: http://www.clinicaltrials.gov. Unique identifier: NCT01709682.
Collapse
Affiliation(s)
- Evgeny Pokushalov
- State Research Institute of Circulation Pathology, Novosibirsk, Russia
| | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Kornej J, Reinhardt C, Kosiuk J, Arya A, Hindricks G, Adams V, Husser D, Bollmann A. Response of circulating heat shock protein 70 and anti-heat shock protein 70 antibodies to catheter ablation of atrial fibrillation. J Transl Med 2013; 11:49. [PMID: 23432758 PMCID: PMC3599085 DOI: 10.1186/1479-5876-11-49] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 02/20/2013] [Indexed: 01/05/2023] Open
Abstract
Background This pilot study investigated the association between heat shock protein 70 (HSP70) and anti-HSP70 antibodies as well as their changes and rhythm outcome after atrial fibrillation (AF) catheter ablation. Methods We studied 67 patients with AF (59±11 years, 66% male, 66% lone AF) undergoing catheter ablation. Circulating HSP70 and anti-HSP70 antibody levels were quantified using commercially available assays before and 6 months after catheter ablation. Serial 7-day Holter ECGs were used to detect AF recurrences. Results At baseline, HSP70 was detectable in 14 patients (21%), but there was no correlation between clinical or echocardiographic variables and the presence or the level of HSP70. In contrast, patients with paroxysmal AF (n=39) showed lower anti-HSP70 antibodies (median [IQR] of 43 [28 – 62] μg/ml) than patients with persistent AF (n=28; 53 [41 – 85] μg/ml, p=0.035). Using multivariable regression analysis, AF type was the only variable associated with anti-HSP70 antibodies (Beta=0.342, p=0.008). At 6 months, HSP70 was present in 27 patients (41%, p<0.001 vs. baseline). Similarly, there was an increase of anti-HSP70 antibodies (48 [36 – 72] vs. 57 [43 – 87] μg/ml, p<0.001). AF recurrence rates were higher in patients with HSP70 increase ≥0.025 ng/ml (32 vs. 11%, p=0.038) or anti-HSP70 increase ≥2.5 μg/ml (26 vs. 4%, p=0.033). Conclusions HSP70 and anti-HSP70 antibodies may – at least in part – be associated in the progression of AF and AF recurrence after catheter ablation.
Collapse
Affiliation(s)
- Jelena Kornej
- Department of Electrophysiology, Heart Center Leipzig, Strümpellstr, 39, 04289 Leipzig, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
9
|
De Vos CB, Breithardt G, Camm AJ, Dorian P, Kowey PR, Le Heuzey JY, Naditch-Brûlé L, Prystowsky EN, Schwartz PJ, Torp-Pedersen C, Weintraub WS, Crijns HJ. Progression of atrial fibrillation in the REgistry on Cardiac rhythm disORDers assessing the control of Atrial Fibrillation cohort: clinical correlates and the effect of rhythm-control therapy. Am Heart J 2012; 163:887-93. [PMID: 22607868 DOI: 10.1016/j.ahj.2012.02.015] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Accepted: 02/15/2012] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Paroxysmal atrial fibrillation (AF) may progress to persistent AF. We studied the clinical correlates and the effect of rhythm-control strategy on AF progression. METHODS RecordAF was a worldwide prospective survey of AF management. Consecutive eligible patients with recent-onset AF were included and allocated to rate or rhythm control according to patient/physician choice. A total of 2,137 patients were followed up for 12 months. Atrial fibrillation progression was defined as a change from paroxysmal to persistent/permanent AF. RESULTS Progression of AF occurred in 318 patients (15%) after 1 year. Patients with AF progression were older; had a higher diastolic blood pressure; and more often had a history of coronary artery disease, stroke or transient ischemic attack, hypertension, or heart failure. Patients treated with rhythm control were less likely to show progression than those treated only with rate control (164/1542 [11%] vs 154/595 [26%], P < .001). Multivariable analysis showed that history of heart failure (odds ratio [OR] 2.2, 95% CI 1.7-2.9, P < .0001), history of hypertension (OR 1.5, 95% CI 1.1-2.0, P = .01), and rate control rather than rhythm control (OR 3.2, 95% CI 2.5-4.1, P < .0001) were independent predictors of AF progression. The propensity score-adjusted OR of AF progression in patients with rate rather than rhythm control was 3.3 (95% CI 2.4-4.6, P < .0001). CONCLUSIONS Although heart failure and hypertension are associated with AF progression, rhythm control is associated with lower risk of AF progression.
Collapse
Affiliation(s)
- Cees B De Vos
- Department of Cardiology, Maastricht University Medical Centre, Maastricht, The Netherlands.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Anselmino M, D’Ascenzo F, Amoroso G, Ferraris F, Gaita F. History of transcatheter atrial fibrillation ablation. J Cardiovasc Med (Hagerstown) 2012; 13:1-8. [PMID: 22130041 DOI: 10.2459/jcm.0b013e32834ead59] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
11
|
de Vos CB, Pisters R, Nieuwlaat R, Prins MH, Tieleman RG, Coelen RJS, van den Heijkant AC, Allessie MA, Crijns HJGM. Progression from paroxysmal to persistent atrial fibrillation clinical correlates and prognosis. J Am Coll Cardiol 2010; 55:725-31. [PMID: 20170808 DOI: 10.1016/j.jacc.2009.11.040] [Citation(s) in RCA: 474] [Impact Index Per Article: 33.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2009] [Revised: 11/23/2009] [Accepted: 11/30/2009] [Indexed: 01/14/2023]
Abstract
OBJECTIVES We investigated clinical correlates of atrial fibrillation (AF) progression and evaluated the prognosis of patients demonstrating AF progression in a large population. BACKGROUND Progression of paroxysmal AF to more sustained forms is frequently seen. However, not all patients will progress to persistent AF. METHODS We included 1,219 patients with paroxysmal AF who participated in the Euro Heart Survey on AF and had a known rhythm status at follow-up. Patients who experienced AF progression after 1 year of follow-up were identified. RESULTS Progression of AF occurred in 178 (15%) patients. Multivariate analysis showed that heart failure, age, previous transient ischemic attack or stroke, chronic obstructive pulmonary disease, and hypertension were the only independent predictors of AF progression. Using the regression coefficient as a benchmark, we calculated the HATCH score. Nearly 50% of the patients with a HATCH score >5 progressed to persistent AF compared with only 6% of the patients with a HATCH score of 0. During follow-up, patients with AF progression were more often admitted to the hospital and had more major adverse cardiovascular events. CONCLUSIONS A substantial number of patients progress to sustained AF within 1 year. The clinical outcome of these patients regarding hospital admissions and major adverse cardiovascular events was worse compared with patients demonstrating no AF progression. Factors known to cause atrial structural remodeling (age and underlying heart disease) were independent predictors of AF progression. The HATCH score may help to identify patients who are likely to progress to sustained forms of AF in the near future.
Collapse
Affiliation(s)
- Cees B de Vos
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands.
| | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Queiroga A, Marshall HJ, Clune M, Gammage MD. Ablate and pace revisited: long term survival and predictors of permanent atrial fibrillation. Heart 2003; 89:1035-8. [PMID: 12923021 PMCID: PMC1767849 DOI: 10.1136/heart.89.9.1035] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
OBJECTIVE To assess long term mortality and identify factors associated with the development of permanent atrial fibrillation after atrioventricular (AV) node ablation for drug refractory paroxysmal atrial fibrillation. DESIGN Retrospective cohort study. SETTING UK tertiary centre teaching hospital. PATIENTS Patients admitted to the University Hospital Birmingham between January 1995 and December 2000. INTERVENTIONS AV node ablation and dual chamber mode switching pacing. MAIN OUTCOME MEASURES Long term mortality and predictors of permanent atrial fibrillation, assessed through Kaplan-Meier curves and logistic regression. RESULTS 114 patients (1995-2000) were included: age (mean (SD)), 65 (9) years; 55 (48%) male; left atrial diameter 4 (1) cm; left ventricular end diastolic diameter 5 (1) cm; ejection fraction 54 (17)%. Indications for AV node ablation were paroxysmal atrial fibrillation in 95 (83%) and paroxysmal atrial fibrillation/flutter in 19 (17%). The survival curve showed a low overall mortality after 72 months (10.5%). Fifty two per cent of patients progressed to permanent atrial fibrillation within 72 months. There was no difference in progression to permanency between paroxysmal atrial fibrillation and paroxysmal atrial fibrillation/flutter (log rank 0.06, p = 0.8). Logistic regression did not show any association between the variables collected and the development of permanent atrial fibrillation, although age over 80 years showed a trend (p = 0.07). CONCLUSIONS Ablate and pace is associated with a low overall mortality. No predictors of permanent atrial fibrillation were identified, but 48% of patients were still in sinus rhythm at 72 months. These results support the use of dual chamber pacing for paroxysmal atrial fibrillation patients after ablate and pace.
Collapse
Affiliation(s)
- A Queiroga
- The University of Birmingham, Queen Elizabeth Hospital, Edgbaston, Birmingham, UK
| | | | | | | |
Collapse
|
13
|
Brignole M, Gammage M, Jordaens L, Sutton R. Report of a study group on ablate and pace therapy for paroxysmal atrial fibrillation. Barcelona Discussion Group. Working Group on Arrhythmias of the European Society of Cardiology. Europace 1999; 1:8-13. [PMID: 11220546 DOI: 10.1053/eupc.1998.0014] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Atrioventricular junctional (AVJ) catheter ablation followed by pacemaker implantation is now widely accepted for patients affected by paroxysmal atrial fibrillation (PAF) not controlled by antiarrhythmic drugs. However, few data exist on its indications, optimal methodology and complications. Therefore a study group examined current practice in Europe and North America, using a questionnaire, followed by a Study Group Meeting to discuss the results. Based upon this, class I, class II and class III indications were proposed. Class I indications (for which general agreement existed) include drug-refractory PAF, correlating with important symptoms, the bradycardia tachycardia syndrome already treated with a pacemaker, and continued PAF. Large differences exist in the current methodology, but consensus was reached on the technical approaches of right and left-sided AVJ ablation, and on the timing of pacemaker implant in relation to ablation. No complete agreement was reached on technical features such as catheter choice and heparin use. The recommended pacing mode was DDDR with mode switching.
Collapse
Affiliation(s)
- M Brignole
- Department of Cardiovascular Medicine, University of Birmingham and Queen Elizabeth Hospital, Edgbaston, UK
| | | | | | | |
Collapse
|