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Background: Recurrences of atrial fibrillation (AF) after pulmonary vein isolation (PVI) are mainly due to pulmonary vein reconnection. However, a growing number of patients have AF recurrences despite durable PVI. The optimal ablative strategy for these patients is unknown. We analyzed the impact of current ablation strategies in a large multicenter study. Methods: Patients undergoing a redo ablation for AF and presenting durable PVI were included. The freedom from atrial arrhythmia after pulmonary vein-based, linear-based, electrogram-based, and trigger-based ablation strategies were compared. Results: Between 2010 and 2020, 367 patients (67% men, 63±10 years, 44% paroxysmal) underwent a redo ablation for AF recurrences despite durable PVI at 39 centers. After durable PVI was confirmed, linear-based ablation was performed in 219 (60%) patients, electrogram-based ablation in 168 (45%) patients, trigger-based ablation in 101 (27%) patients, and pulmonary vein-based ablation in 56 (15%) patients. Seven patients (2%) did not undergo any additional ablation during the redo procedure. After 22±19 months of follow-up, 122 (33%) and 159 (43%) patients had a recurrence of atrial arrhythmia at 12 and 24 months, respectively. No significant difference in arrhythmia-free survival was observed between the different ablation strategies. Left atrial dilatation was the only independent factor associated with arrhythmia-free survival (HR, 1.59 [95% CI, 1.13–2.23]; P =0.006). Conclusions: In patients with recurrent AF despite durable PVI, no ablation strategy used alone or in combination during the redo procedure appears to be superior in improving arrhythmia-free survival. Left atrial size is a significant predictor of ablation outcome in this population.

Introduction: Catheter ablation of atrial fibrillation (AF) and/or atrial tachycardia (AT) in heart failure (HF) patients provides improvement in symptoms cardiac function and survival. However, these procedures remain challenging with higher recurrence and complication rates compared to patients with normal cardiac function. We aimed to compare outcomes of AF/AT ablations guided by an ultra-high density mapping system between HF patients and controls. Methods and results: Primary endpoint was the one-year recurrence rate of AF/AT. We retrospectively examined all Rhythmia™-guided procedures performed in Caen and Toulouse University Hospitals between 2015 and 2018 for AF/AT. Patients with reduced left ventricular ejection fraction (LVEF) (i.e. Conclusion: Clinical outcomes of AF/AT ablations guided by UHD mapping system appear similar in HF and non-HF patients. During the follow-up period, patients with HF exhibit improvement of NYHA status and LVEF.

International audience; Background: Women with congenital heart disease at high risk for sudden cardiac death have been poorly studied thus far.Objectives: The aim of this study was to assess sex-related differences in patients with tetralogy of Fallot (TOF) and implantable cardioverter-defibrillators (ICDs).Methods: Data were analyzed from the DAI-T4F (French National Registry of Patients With Tetralogy of Fallot and Implantable Cardioverter Defibrillator) cohort study, which has prospectively enrolled all patients with TOF with ICDs in France since 2010. Clinical events were centrally adjudicated by a blinded committee.Results: A total of 165 patients (mean age 42.2 ± 13.3 years) were enrolled from 40 centers, including 49 women (29.7%). Among the 9,692 patients with TOF recorded in the national database, the proportion of women with ICDs was estimated to be 1.1% (95% CI: 0.8%-1.5%) vs 2.2% (95% CI: 1.8%-2.6%) in men (P < 0.001). The clinical profiles of patients at implantation, including the number of risk factors for ventricular arrhythmias, were similar between women and men. During a median follow-up period of 6.8 years (IQR: 2.5-11.4 years), 78 patients (47.3%) received at least 1 appropriate ICD therapy, without significant difference in annual incidences between women (12.1%) and men (9.9%) (HR: 1.22; 95% CI: 0.76-1.97; P = 0.40). The risk for overall ICD-related complications was similar in women and men (HR: 1.33; 95% CI: 0.81-2.19; P = 0.30), with 24 women (49.0%) experiencing at least 1 complication.Conclusions: Our findings suggest that women with TOF at high risk for sudden cardiac death have similar benefit/risk balance from ICD therapy compared with men. Whether ICD therapy is equally offered to at-risk women vs men warrants further evaluation in TOF as well as in other congenital heart disease populations. (French National Registry of Patients With Tetralogy of Fallot and Implantable Cardioverter Defibrillator [DAI-T4F]; NCT03837574)

Background: Tetralogy of Fallot (TOF) is the most common cyanotic congenital heart disease, and sudden cardiac death represents an important mode of death in these patients. Data evaluating the implantable cardioverter defibrillator (ICD) in this patient population remain scarce. Methods: A Nationwide French Registry including all patients with tetralogy of Fallot with an ICD was initiated in 2010 by the French Institute of Health and Medical Research. The primary time to event end point was the time from ICD implantation to first appropriate ICD therapy. Secondary outcomes included ICD-related complications, heart transplantation, and death. Clinical events were centrally adjudicated by a blinded committee. Results: A total of 165 patients (mean age, 42.2±13.3 years, 70.1% males) were included from 40 centers, including 104 (63.0%) in secondary prevention. During a median (interquartile range) follow-up of 6.8 (2.5–11.4) years, 78 (47.3%) patients received at least 1 appropriate ICD therapy. The annual incidence of the primary outcome was 10.5% (7.1% and 12.5% in primary and secondary prevention, respectively; P =0.03). Overall, 71 (43.0%) patients presented with at least 1 ICD complication, including inappropriate shocks in 42 (25.5%) patients and lead dysfunction in 36 (21.8%) patients. Among 61 (37.0%) patients in primary prevention, the annual rate of appropriate ICD therapies was 4.1%, 5.3%, 9.5%, and 13.3% in patients with, respectively, 0, 1, 2, or ≥3 guidelines-recommended risk factors. QRS fragmentation was the only independent predictor of appropriate ICD therapies (hazard ratio, 3.47 [95% CI, 1.19–10.11]), and its integration in a model with current criteria increased the 5-year time-dependent area under the curve from 0.68 to 0.81 ( P =0.006). Patients with congestive heart failure or reduced left ventricular ejection fraction had a higher risk of nonarrhythmic death or heart transplantation (hazard ratio, 11.01 [95% CI, 2.96–40.95]). Conclusions: Patients with tetralogy of Fallot and an ICD experience high rates of appropriate therapies, including those implanted in primary prevention. The considerable long-term burden of ICD-related complications, however, underlines the need for careful candidate selection. A combination of easy-to-use criteria including QRS fragmentation might improve risk stratification. Registration: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT03837574.

AimsNo data exist concerning the clinical performances of the subcutaneous implantable cardioverter-defibrillator (S-ICD) atrial fibrillation (AF) detection algorithm. We aimed to study the performances and implications of the latter in a ‘real-world’ setting.Methods and resultsBetween July 2017 and August 2019, 155 consecutive S-ICD recipients were included. Endpoint of the study was the incidence of de novo or recurrent AF using a combined on-site and remote-monitoring follow-up approach. After a mean follow-up of 13 ± 8 months, 2531 AF alerts were generated for 55 patients. A blinded analysis of the 1950 subcutaneous electrocardiograms available was performed. Among them 47% were true AF, 23% were premature atrial contractions or non-sustained AF, 29% were premature ventricular contractions or non-sustained ventricular tachycardia, and 1% were misdetection. Fourteen percent (21/155) patients had at least one correct diagnosis of AF by the S-ICD algorithm. One patient presented symptomatic paroxysmal AF not diagnosed by the S-ICD algorithm (false negative patient). Patient-based sensitivity, specificity, positive, and negative predictive values were respectively 95%, 74%, 38%, and 99%. Among patients with at least one correct diagnosis of AF, 38% (8/21) had subsequent clinical implications (anticoagulation initiation or rhythm control therapies).ConclusionThe S-ICD AF detection algorithm yields a high sensitivity for AF diagnosis. Low specificity and positive predictive value contribute to a high remote monitoring-notification workload and underline the necessity of a manual analysis. Atrial fibrillation diagnosis by the S-ICD AF detection algorithm might lead to significant therapeutic adjustments.

Aims Limited data exist concerning fragmented QRS complexes (fQRSs) on the surface electrocardiogram (ECG) of apparently healthy athletes. We aimed to study the prevalence and significance of fQRS in lead V1 (fQRSV1), representing right ventricular (RV) activation, regarding training-induced RV morphological remodelling. Methods and results Between January 2017 and August 2019, 434 consecutive non-sedentary subjects underwent preparticipation cardiovascular screening, including a 12-lead ECG. Three hundred and ninety-three apparently healthy subjects were included, 119 of them were athletes (defined as performing ≥8 h/week for the last 6 months) and 274 were non-athletes. All athletes underwent two-dimensional transthoracic echocardiography. Fragmented QRS complex in lead V1 pattern was defined as a narrow ( Conclusion Fragmented QRS complex in lead V1 is a newly described, frequent, ECG pattern in young and apparently healthy athletes and is associated with training-induced RV remodelling.

Background The combination of vitamin K antagonists (VKA) for atrial fibrillation (AF) and antiplatelet agents following percutaneous coronary intervention (PCI) is associated with an increased bleeding risk. Hypothesis Direct oral anticoagulants (DOAC) are associated with a greater safety profile but the optimal antithrombotic treatment strategy, especially when considering ischemic events, is unclear. Methods We performed a meta‐analysis of randomized controlled trials comparing outcomes in AF patients following PCI and/or acute coronary syndrome (ACS) when treated with DOAC vs VKA, both in combination with one (dual) or two (triple) antiplatelet regimens. A systematic review was performed by searches of electronic databases MEDLINE (source PubMed) and the Cochrane Controlled Clinical Trials Register Database as well as Cardiology annual meetings. Three studies were finally included. Results Compared to VKA triple therapy, the use of DOAC was associated with a decreased risk of any bleeding (relative risk [RR] 0.68 [0.62; 0.74]), major bleeding (RR 0.61 [0.51; 0.75]) and intracranial bleeding (RR 0.33 [0.17; 0.66]) and similar rates of the composite efficacy endpoint (RR 1.0 [0.87; 1.14]) and its components. Similar and consistent results were observed with both dual and triple therapy including a DOAC compared to VKA. Conclusion Our meta‐analysis supports the use of dual therapy combining a DOAC and clopidogrel as the default regimen in most AF patients after PCI and/or ACS.

Ultra-high-density mapping allows very accurate characterization of circuits/mechanisms in atrial tachycardia (AT). Whether these advantages will translate into a better procedural or long-term clinical outcome is unknown. Sixty consecutive AT ablation procedures using ultra-high-density mapping (Rhythmia™, group 1) were retrospectively compared to 60 consecutive procedures using standard high-density mapping (Carto/NavX™, group 2) (total 209 AT, 79% left AT). A higher number of maps were performed in group 1 (4.8 ± 2.5 vs 3.2 ± 1.7, p = 0.0001) with similar acquisition duration (12 ± 5 vs 13 ± 6 min per map, p = ns), although with a greater number of activation points (10,543 ± 5854 vs 689 ± 1827 per map, p

Background Sympathetic overactivity is implicated in the initiation and maintenance of electrical storm (ES). Deep sedation has empirically been considered as an efficient therapeutic option to blunt sympathetic tone and control ES. Purpose The aim of this multicenter study was to determine the efficacy of deep sedation in patients presenting intractable ES refractory to anti-arrhythmic drugs. Methods Patients requiring deep sedation for refractory ES from January 1st 2007 to July 31st 2018 were retrospectively included in 13 centers. The primary endpoint was the rate of acute response to sedation, defined as ES termination within 15 minutes after deep sedation. Results Among the 116 patients, 55 (47.4%) had ES termination within 15 minutes and were considered “acute responders” to deep sedation. Clinical signs of congestive heart failure before deep sedation (OR=3.31, 95% CI:1.001–10.97, p=0.049) was the only independent predictor of non-acute response. Twenty-one non-acute responders (34.4%) had an extracorporeal membrane oxygenation (ECMO) implanted. Non-acute responders had a significantly lower in-hospital survival (Log-rank, p=0.010). ECMO implantation did not influence survival in non-acute responders to sedation. Acute response to deep sedation was an independent protector of in-hospital mortality, decreasing by 73% the risk of death (OR 0.27; 95% CI:0.10–0.70, p=0.008). Conclusion To the best of our knowledge, this multicenter study is the first analysis of the efficacy of deep sedation in patients with intractable ES refractory to anti-arrhythmic drugs, and demonstrating the positive impact of “acute response” on in-hospital survival. Funding Acknowledgement Type of funding source: None

International audience

Aims Sudden cardiac arrest remains a major complication of acute myocardial infarction (AMI) and is frequently related to ventricular fibrillation (VF). Incidence and impact of VF among patients hospitalized for AMI were evaluated. Methods and results Data from the FAST-MI programme consisting of 5 French nationwide prospective cohort studies between 1995 and 2015 were analysed, totally including 14 423 patients with AMI (66 ± 14 years, 72% males, 59% ST-elevation myocardial infarction). Overall, proportion of patients presenting in-hospital VF decreased from 3.9% in 1995 to 1.8% in 2015 (P < 0.001). One-year mortality decreased from 60.7% to 24.6% (P < 0.001). However, compared with patients who did not develop VF, the over-risk of 1-year mortality associated with VF was stable over time [hazard ratio (HR) 6.78, 95% confidence interval (CI) 5.03–9.14 in 1995 and HR 6.64, 95% CI 4.20–10.49 in 2015, P = 0.52]. This increased mortality in the VF group was mainly related to fatal events occurring prior to hospital discharge, representing 86.2% of 1-year mortality, despite the very low rate of implantable cardioverter defibrillator in the VF group (2.6%). Conclusion This study demonstrates that in-hospital VF incidence and mortality in the setting of AMI have significantly decreased over the past 20 years. Nevertheless, VF remained steadily associated with approximately a 10-fold increased relative risk of in-hospital mortality, without an impact on post-discharge mortality. Beyond long-term cardiac defibrillation strategy, these results emphasize the need to identify in-hospital interventions to further reduce mortality in VF patients. Study registration ClinicalTrials.gov Identifier: NCT00673036, NCT01237418, NCT02566200

Aims The explosion of novel anticancer therapies has meant emergence of cardiotoxicity signals including atrial fibrillation (AF). Reliable data concerning the liability of anticancer drugs in inducing AF are scarce. Using the World Health Organization individual case safety report database, VigiBase®, we aimed to determine the association between anticancer drugs and AF. Methods and results A disproportionality analysis evaluating the multivariable-adjusted reporting odds ratios for AF with their 99.97% confidence intervals was performed for 176 U.S. Food and Drug Administration (FDA)- or European Medicines Agency (EMA)-labelled anticancer drugs in VigiBase®, followed by a descriptive analysis of AF cases for the anticancer drugs identified in VigiBase®. ClinicalTrial registration number: NCT03530215. A total of 11 757 AF cases associated with at least one anticancer drug were identified in VigiBase® of which 95.8% were deemed serious. Nineteen anticancer drugs were significantly associated with AF of which 14 (74%) are used in haematologic malignancies and 9 (45%) represented new AF associations not previously confirmed in literature including immunomodulating agents (lenalidomide, pomalidomide), several kinase inhibitors (nilotinib, ponatinib, midostaurin), antimetabolites (azacytidine, clofarabine), docetaxel (taxane), and obinutuzumab, an anti-CD20 monoclonal antibody. Conclusion Although cancer malignancy itself may generate AF, we identified 19 anticancer drugs significantly associated with a significant increase in AF over-reporting. This pharmacovigilance study provides evidence that anticancer drugs themselves could represent independent risk factors for AF development. Dedicated prospective clinical trials are now required to confirm these 19 associations. This list of suspected anticancer drugs should be known by physicians when confronted to AF in cancer patients, particularly in case of haematologic malignancies.

Background Cardiac resynchronization therapy has been shown to benefit selected patients with heart failure and reduced ejection fraction. Older patients have been underrepresented in randomized trials. This study was conducted to determine whether predictive factors for cardiac resynchronization therapy outcomes differ in patients older and younger than 75 years of age. Methods Consecutive patients who received a cardiac resynchronization device cardiac resynchronization therapy between 2013 and 2016 in our center were retrospectively included in this cohort study. The primary endpoint was cardiac resynchronization therapy effectiveness, which was defined as survival for one year with both no heart failure hospitalization and improvement by one or more NYHA class. The secondary endpoints were mortality, complications, and device therapies. Results Among the 243 patients included, 102 were ≥ 75 years old. Cardiac resynchronization therapy effectiveness was observed in 70 patients (50%) p = 0.69). NYHA class ≥III (OR = 6.02; CI95% [1.33–18.77], p = 0.002) was a predictive factor for cardiac resynchronization therapy effectiveness only in the ≥75-year-old group, while atrial fibrillation was independently negatively associated with the primary endpoint in the p = 0.001). The one-year mortality rate was 14%, with no difference between age groups. Rescue cardiac resynchronization therapy and atrial fibrillation were independent predictive factors for mortality in both age groups. Eighty-two complications occurred in 45 patients (19%), with no difference between groups. Defibrillator use and QRS duration were independent predictive factors for complications in both age groups. There was no difference between groups considering device therapies. Conclusion At one year, cardiac resynchronization therapy response is not compromised by patient age. In older patients, highly symptomatic individuals with NYHA class ≥III have better outcomes after cardiac resynchronization therapy.

Background Mineralocorticoid receptor antagonists ( MRA s) have emerged as potential atrial fibrillation ( AF ) preventive therapy, but inconsistent results have been reported. We aimed to examine the effects of MRA s on AF occurrence and explore factors that could influence the magnitude of the effect size. Methods and Results PubMed, Embase, and Cochrane Central databases were used to search for randomized clinical trials and observational studies addressing the effect of MRA s on AF occurrence from database inception through April 03, 2018. We performed a systematic review and random effects meta‐analyses to compute odds ratios with 95% CI s. Meta‐regression was then applied to explore the sources of between‐study heterogeneity. We included 24 studies, 11 randomized clinical trials and 13 observational cohorts, representing a total number of 7914 patients (median age: 64.2 years; median left ventricular ejection fraction: 49.7%; median follow‐up: 12.0 months), 2843 (35.9%) of whom received MRA therapy. Meta‐analyses showed a significant overall reduction in AF occurrence in the MRA ‐treated patients versus the control groups (15.0% versus 32.2%; odds ratio, 0.55; 95% CI , 0.44–0.70 [ P AF episodes ( odds ratio , 0.42; 95% CI , 0.31–0.59 [ P I 2 =54%; P =0.0008). Meta‐regression analyses showed that effect size was significantly associated with older studies and higher AF occurrence rate in the control groups. Conclusions MRA s seem to be effective in AF prevention, especially regarding recurrent AF episodes.

Background Despite the emergence of new therapies, Pulmonary Hypertension (PH) still has a high mortality. Several clinical, echocardiographic, biological or hemodynamic prognostic factors have been identified but are of limited predictive value for survival. We aimed to assess whether heart rate (HR) and all ECG abnormalities measured on a 12-lead ECG may help to better identify patients at high risk of death in this population. Methods and results 296 patients followed in a registry were included with all types of PH, except group 2 of the WHO clinical classification. After a median follow-up of 10 years, age, male sex, NYHA III/IV status and, among all ECG parameters, HR and corrected QT interval were associated with mortality. In multivariate analysis, HR, age and male sex remained significant independent predictors of mortality. HR has a higher predictive value in the 238 patients in sinus rhythm. In addition, only HR was significantly correlated with clinical and hemodynamic PH prognostic factors. Conclusion HR measured on a 12-lead ECG at the time of the diagnosis is a strong independent predictor of mortality in PH patients.

The IntellaMap OrionTM (Boston Scientific) is a 64-electrode basket catheter allowing for ultrahigh-density mapping of complex cardiac arrhythmias. We report the case of a basket catheter vascular entrapment, requiring surgical removal.

Background Same-day home discharge after common atrial flutter catheter ablation (CAFCA) is a feasible, safe, and cost-effective practice, but there are currently no data for patients treated with direct oral anticoagulants (DOAs). Objective We evaluated the safety, efficacy, and feasibility of ambulatory CAFCA in patients treated with DOAs compared with those treated with vitamin K antagonists (VKAs). Methods Patients scheduled for isolated and elective ambulatory CAFCA in our tertiary university center between 2009 and 2019 were included. Propensity score for anticoagulant type was calculated from age, sex, body mass index, HAS-BLED and CHA2DS2-VASc scores, chronic kidney disease, associated antiplatelet treatment, procedure duration, and number of femoral venipunctures. Results Propensity score matching yielded 820 patients (mean age 67 ± 11 years). Catheter ablation was performed under uninterrupted VKA (n = 410; international normalized ratio 2.5 ± 0.6) or uninterrupted DOA (n = 410). The procedural success rate was 91%, and the effective same-day discharge rate was 93%. The occurrence of the primary end point, defined as any early and clinically significant bleeding (Bleeding Academic Research Consortium classification ≥ 2) at 1 week, was similar between patients treated with DOAs and those treated with VKAs (2.9% vs 3.7%; P = .70). Female sex, high HAS-BLED score, and prolonged procedure duration were independently associated with the primary end point. Conclusion Uninterrupted DOA regimens are safe for patients undergoing ambulatory CAFCA in a high-volume center with a dedicated ambulatory unit and standardized procedural and postoperative management.

Previous studies showed good agreement between pacemaker respiratory disturbance index (RDI) and polysomnography for diagnosis of severe sleep apnea (SA). The aim of this study is to investigate the diagnostic accuracy of RDI compared with apnea-hypopnea index (AHI) from a cardiorespiratory sleep study for the diagnosis of severe SA within patients requiring a pacemaker and meeting diastolic dysfunction criteria. Secondary objectives are as follows: correlation between plasma aldosterone level and SA severity, diagnostic accuracy of RDI for moderate SA, prevalence of SA among patients with diastolic dysfunction, occurrence of arrhythmias, and improvement of RDI with continuous positive airway pressure therapy. We designed a monocentric prospective nonrandomized study of prevalent cases to include 68 patients with a 6-month follow-up. Both RDI and AHI will be compared 2 months after implantation and after 1 month of continuous positive airway pressure treatment in patients with severe SA. This is the first study that examines diagnostic accuracy of pacemaker algorithm for the diagnosis of SA and correlation with plasma aldosterone levels in patients with diastolic dysfunction. Protocol version: V04. 04/04/2017 Trial registration: ClinicalTrials.gov NCT02751021

Introduction. Implantable cardioverter-defibrillator (ICD) prevents from sudden cardiac death but it requires the use of intra-cardiac leads which are associated with the majority of the ICD’s complications. Recently, a new type of subcutaneous ICD (S-ICD) with no intravascular lead was developed and constitutes an alternative to the standard transvenous ICD (TV-ICD). Aim. We studied the safety and efficacy of the S-ICD device compared to (TV-ICD) in Caen University Hospital. Methods. One-hundred-and-seven patients were retrospectively included from April 2015 and October 2017: 28 in the S-ICD group and 79 in the TV-ICD group. The primary safety end-point was the rate of complications (local, infectious, electronic or lead failure inappropriate device therapy). The secondary end-points were the effectiveness of the device and the mortality rate. Results. There were significantly more inappropriate therapies in the S-ICD group (14% versus 3%, p = 0,039), and more local discomfort (p = 0,05). There was neither difference between the two groups regarding the remaining local complications, especially hemorrhagic complications, nor difference in lead or electronic failure. None of our patients experienced device infection. No difference was observedin appropriate device therapies and in mortality rates between the S-ICD and the TV-ICD groups. Conclusion. In our population, complications are different between TV-ICD and S-ICD patients. Latter experienced more inappropriate device therapies. However, Our study confirms safety and effectiveness of S-ICD compared to Tv-ICD with no difference regarding efficacy of the device and mortality.; Introduction. Le défibrillateur implantable a montré son efficacité et sa sûreté dans la prévention de la mort subite rythmique. Néanmoins les complications liées au matériel, pour la plupart liées aux électrodes endocavitaires, sont responsables d’une morbi-mortalité non négligeables et d’une dégradation de la qualité de vie. Depuis les années 2000, un nouveau système de défibrillation entièrement sous-cutané a été développé, et constitue une alternative fiable au système endocavitaire désormais intégrée aux recommandations. Objectif. Nous avons comparé les résultats du défibrillateur sous-cutané (S-DAI) au défibrillateur trans-veineux (TV-DAI) en termes de sécurité et d’efficacité à court et long terme, au Centre Hospitalo-Universitaire de Caen. Méthodes. Cent-sept patients ont été inclus rétrospectivement entre le 30 Avril 2015 et le 30 Octobre 2017 : 28 patients dans le groupe S-DAI et 79 dans le groupe TV-DAI. Le critère primaire était l’apparition d’une complication locale, infectieuse, de matériel ou la survenue d’une thérapie inappropriée. Le critère secondaire était l’évaluation de l’efficacité du dispositif en terme de thérapies appropriées, et de la mortalité toute cause. Résultats. Au terme d’un suivi moyen de 14 mois , les patients implantés d’un S-DAI ont présenté plus de thérapies inappropriées que les patients implantés d’un TV-DAI (14% contre 3%, p = 0,039) et plus de gênes fonctionnelles (p = 0,05). Il n’y a pas eu de différence entre les deux groupes concernant les autres complications locales notamment hémorragiques ni les complications électroniques. Aucun patient n’a présenté de complication infectieuse au cours du suivi. Il n’y a pas eu de différence significative en termes d’efficacité et de mortalité entre les deux types de défibrillateurs. Conclusion. Les complications secondaires aux deux types de défibrillateurs sont différentes avec dans notre série plus de thérapies inappropriées chez les porteurs de S-DAI. Néanmoins nos résultats confirment que le S-DAI est sûr et aussi efficace en prévention de la mort subite cardiaque que le TV-DAI.