Fibrillazione atriale e scompenso: come interrompere il circolo vizioso.
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1 Alessandria, September 23 th 2017 Fibrillazione atriale e scompenso: come interrompere il circolo vizioso. Professor Fiorenzo Gaita Chief of the Cardiovascular Department Città della Salute e della Scienza Hospital University of Turin, Italy
2 Patients with atrial fibrillation (%) Prevalence of AF in HF Trials % NYHA III-IV NYHA IV 40 NYHA II-III NYHA I-II 10 0
3 AF in pts with HF increases the risk of death In the VEST study, AF caused an increase of 2.3 times the risk of death in patients with heart failure. (Konety, AHA 1998) In the AMIOVIRT study, AF resulted an independent risk factor for mortality (RR 4) in pts with CHF. (Strickberger, J Am Coll Cardiol 2004) In the SOLVD study, AF was an independent risk factor for mortality (RR 1.34) and progression of CHF (RR 1.42). (Vermes, Circulation 2003)
4 Heart failure and atrial fibrillation Triggered activity Heterogeneous conduction Atrial fibrosis Atrial stretch Pressure and volume overload Atrial fibrillation Heart failure Fast ventricular rate Irregular cycles Loss of atrial contraction Mitral and tricuspid regurgitation
5 Heart failure and atrial fibrillation Triggered activity Heterogeneous conduction Atrial fibrosis Atrial stretch Pressure and volume overload Atrial fibrillation Heart failure Fast ventricular rate Irregular cycles Loss of atrial contraction Mitral and tricuspid regurgitation
6 Heart Failure therapy: aims Symptoms relief and exercise tolerance Reduction of HF-related major morbidity Reduction mortality
7 RHYTHM CONTROL 2006 AF GUIDELINES HEART FAILURE AMIODARONE DOFETILIDE TC ABLATION ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation
8 Survival (%) Prospective, multi-center, randomized, double blind Placebo vs Amiodarone 667 pts with CHF NYHA II/IV EF 40% CHF-STAT Sub-study 564 (85%) in SR 103 (15%) with AF 33 (6%) New onset of AF at 1 year: pts in Amiodarone pts in Placebo % 4% Amiodarone Placebo 11/268 (4%) 22/296 (8%) p = Converted pts n = 16 n = 35 Non converted pts The 0 maintenance of sinus rhythm was associated to a better prognosis (wks) Circulation 1998; 98: 2574
9 Dedicated invasive atrial fibrillation options in patients with heart failure AV node ablation + RV pacing AV node ablation + CRT Direct AF ablation
10 MILOS study 1285 consecutive patients 243 with permanent AF (19%) LVEF < 35%, QRS > 120 ms, NYHA > II Follow-up 34 months (10-40) BVP 85% at 2 months AVJ ablation 1042 pts in SR 1285 pts 118 AV ablation (50% ICD) 243 (19%) pts in AF 125 pharmacological therapy Gasparini et al. Eur Heart J 2008
11 MILOS study Gasparini et al. Eur Heart J 2008
12 Transcatheter Atrial Fibrillation Ablation in patients with Heart Failure 58 patients Parox AF 9% Pers AF 91% 12 months f-up Ablation protocol 100% PVI 91% PVI+LLs 78% remained in sinus rhythm in 50% of the cases at least 1 redo procedure Hsu, L.-F. et al. N Engl J Med 2004;351:2373
13 Improvement of NYHA class and LV function after AF Ablation in Patients with Congestive Heart Failure NYHA Class PRE-ABLATION POST-ABLATION 2.3 ± ± 0.5 LV Ejection fraction EF increase 21 13% Hsu, L.-F. et al. N Engl J Med 2004;351:2373
14 Khan M et al; NEJM pts PVI ablation 81 pts 40 pts PABA CHF AV node ablation and Biv pacing
15 PVI improved functional capacity (6-minute walk test) and QOL Distance increase 71 m Improvement by 26% QOL Distance increase 16 m Improvement by 6% NEJM 2008; 359 (17):
16 PVs ISOLATION EF improved in 76% of patients Improvement in EF by 8±8% AV-node ablation+biv Decrease in EF by 1±4% EF improved in only 25% of pts Khan M et al; NEJM 2008
17 RHYTHM CONTROL 2006 AF GUIDELINES 2012 AF GUIDELINES HEART FAILURE Yes HEART FAILURE No Due to AF AMIODARONE DOFETILIDE Yes No AMIODARONE Dronedarone /Sotalol TC ABLATION Patient choice TC ABLATION ACC/AHA/ESC 2006 Guidelines for the Management of Patients With Atrial Fibrillation ESC 2012 Guidelines for the Management of Patients With Atrial Fibrillation
18 # of AF ablation studies from 2004 to 2014 # of AF ablation and HF AF ablation AF ablation and HF # of studies (Pubmed search)
19 AF ablation studies in patients with HF Author, Year (Ref) N. pts F-U Success Redo Success months single (%) (%) final (%) LVEF (%) Chen Hsu Tondo Gentlesk Nademanee Lutomsky De Potter Cha Total: % Anselmino Calvo Nedios Bunch Khan MacDonald Jones Hunter %
20 Long-term sinus rhythm 196 patients 78% pers AF 3 years follow-up 62% patients free from AF 29% redos Ablation protocol 100% PVI 85% PVI+LLs+CFAEs J Cardiovasc Electrophysiol 2013
21 Impact of AF ablation on NYHA class and LVEF NYHA Class Baseline NYHA class F-up I II III o IV p<0,001 LV Ejection fraction PRE-ABLATION POST-ABLATION 40.4 ± ± 9.5
22 Multicenter meta-analysis - 25 studies, 1,838 patients from 9 countries and 3 continents - direct contact whit each center will published long-term data
23 Baseline characteristics AF ablation in patients with HF n=1,838 Mean value Age, years 59 Paroxysmal AF, % 45 Persistent AF, % 50 Long-standing persistent, % 5 Time since first AF diagnosis (M) 42 Time since first HF diagnosis (M) 27 Basal pro-bnp (pg/ml) 11,187 Cardiomiopathy - Ischemic, % 41 - Hypertensive, % 10 - Valvular heart disease, % 10 - Idiopathic, % 39 LV ejection fraction, % 40 Anselmino et al. Circ Arrhythm Electrophysiol 2014
24 Periprocedural efficacy and complications Mean follow-up: 23 (18-40) months 40% (33-50) 60% (54-67) after redos in 32% (25-38) No death (out of 1838 patients) 21 thromboembolic events TIA/stroke (1.14%) 12 pericardial tamponade (0.65%)
25 Impact on Symptoms (NYHA class) Baseline Follow up after ablation after ablation 37 63
26 Impact on Left Ventricular Function Baseline Baseline Study end Study end Anselmino et al. Circ Arrhythm Electrophysiol 2014
27 Patients with LVEF<35% with indication for ICD in primary prevention Baseline Baseline 459 Study end Study end at baseline reduced to 183 after ablation Avoid ICD implantation with RRR 60%
28 AF ablation protocol in patients with HF PVI only Author, Year PVI (%) LLs (%) CFAE (%) Chen Hsu Tondo Gentlesk Nademanee Atrial Linear Lines CFAEs De Potter 2010 Cha Anselmino Nedios Khan MacDonald Jones Hunter
29 AF ablation in HF our Institution s approach Parox AF Pers >6m or long-standing AF LA volume <100 ml YES Antral PVI NO Antral PVI + Linear lines and CFAEs
30 Pts in SR without drugs Surgical ablation in pts with structural heart disease long-standing AF, and enlarged left atrium U 7 PV PV 105 pts (3 groups of 35 pts) Gaita et al, Circulation 2005
31 What are the results at more than 10-year follow-up? 73% of pts in sinus rhythm 81% of patients with complete 43% with incomplete scheme Gaita et al, Ann Thorac Surg 2013
32 Persistent AF, ICD or CRT, NYHA II to III, EF <40% Catheter ablation for AF (group 1, n=102) Amiodarone (group 2, n=101). 71% 34% Catheter ablation of AF is superior to Amiodarone in achieving freedom from AF at long-term follow-up and reducing unplanned hospitalization and mortality in patients with heart failure and persistent AF. Di Biase et al Circulation 2016;133:
33 Rhythm control in heart failure 2012 ESC Guidelines 2016 ESC Guidelines Heart failure AMIODARONE (I B) DOFETILIDE (I B) Catheter Ablation (IIb B) Jones JACC 2013; Anselmino Circ AE 2014; Ganesan Heart Lung Circ 2015; Khan NEJM 2008; Al Halabi JACC CE 2015; Di Biase Circ 2016; Hunter Circ AE 2014; MacDonald Heart 2011
34 Conclusion Rhythm control by AF ablation is under recommended despite it achieves an arrhythmia freedom of about % Rhythm control by AF ablation has shown to improve quality of life, LVEF and reduces ICD indications (stroke and mortality) To achieve the best results AF ablation should be recommended soon ( early stage) In pts with increased LA volume end/or persistent AF ablation protocol needs to be more extensive than PVI alone
35 Thank you for your attention!
Scompenso cardiaco e F A : ruolo della ablazione transcatetere. Prof. Fiorenzo Gaita
Scompenso cardiaco e F A : ruolo della ablazione transcatetere Prof. Fiorenzo Gaita Patients with atrial fibrillation (%) Prevalence of AF in HF Trials 60 50 30% NYHA III-IV NYHA IV 40 NYHA II-III 30 20
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