Exon 3 deletion of ryanodine receptor causes left ventricular noncompaction, worsening catecholaminergic polymorphic ventricular tachycardia, and sudden cardiac arrest

2015 ◽  
Vol 167 (9) ◽  
pp. 2197-2200 ◽  
Author(s):  
Matthew J. Campbell ◽  
Richard J. Czosek ◽  
Robert B. Hinton ◽  
Erin M. Miller
Keyword(s):  
Cardiac Arrest ◽  
Ventricular Tachycardia ◽  
Ryanodine Receptor ◽  
Sudden Cardiac Arrest ◽  
Left Ventricular ◽  
Catecholaminergic Polymorphic Ventricular Tachycardia ◽  
Polymorphic Ventricular Tachycardia ◽  
Left Ventricular Noncompaction ◽  
Ventricular Noncompaction

An International Multi-Center Cohort Study on β-blockers for the Treatment of Symptomatic Children with Catecholaminergic Polymorphic Ventricular Tachycardia

Circulation ◽  
2021 ◽  
Author(s):  
Puck J Peltenburg ◽  
Dania Kallas ◽  
Johan M. Bos ◽  
Krystien V. V. Lieve ◽  
Sonia Franciosi ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Ventricular Tachycardia ◽  
Primary Outcome ◽  
Cox Regression ◽  
Sudden Cardiac Arrest ◽  
Interquartile Range ◽  
Catecholaminergic Polymorphic Ventricular Tachycardia ◽  
Polymorphic Ventricular Tachycardia ◽  
Secondary Outcome ◽  
First Occurrence

Background: Symptomatic children with catecholaminergic polymorphic ventricular tachycardia (CPVT) are at risk for recurrent arrhythmic events. Beta-blockers (BBs) decrease this risk, but studies comparing individual BBs in sizeable cohorts are lacking. We aimed to assess the association between risk for arrhythmic events and type of BB in a large cohort of symptomatic children with CPVT. Methods: From two international registries of patients with CPVT, RYR2 variant-carrying symptomatic children (defined as syncope or sudden cardiac arrest prior to BB initiation and age at start of BB therapy <18 years), treated with a BB were included. Cox-regression analyses with time-dependent covariates for BB and potential confounders were used to assess the hazard ratio (HR). The primary outcome was the first occurrence of sudden cardiac death, sudden cardiac arrest, appropriate implantable cardioverter-defibrillator shock, or syncope. The secondary outcome was the first occurrence of any of the primary outcomes except syncope. Results: We included 329 patients (median age at diagnosis 12 [interquartile range, 7-15] years, 35% females). Ninety-nine (30.1%) patients experienced the primary and 74 (22.5%) experienced the secondary outcome during a median follow-up of 6.7 [interquartile range, 2.8-12.5] years. Two-hundred sixteen patients (66.0%) used a non-selective BB (predominantly nadolol [n=140] or propranolol [n=70]) and 111 (33.7%) used a β1-selective BB (predominantly atenolol [n=51], metoprolol [n=33], or bisoprolol [n=19]) as initial BB. Baseline characteristics did not differ. The HR for both the primary and secondary outcomes were higher for β1-selective compared with non-selective BBs (HR, 2.04 95% CI, 1.31-3.17; and HR, 1.99; 95% CI, 1.20-3.30, respectively). When assessed separately, the HR for the primary outcome was higher for atenolol (HR, 2.68; 95% CI, 1.44-4.99), bisoprolol (HR, 3.24; 95% CI, 1.47-7.18), and metoprolol (HR, 2.18; 95% CI, 1.08-4.40) compared with nadolol, but did not differ from propranolol. The HR of the secondary outcome was only higher in atenolol compared with nadolol (HR, 2.68; 95% CI, 1.30-5.55). Conclusions: B1-selective BBs were associated with a significantly higher risk for arrhythmic events in symptomatic children with CPVT compared with non-selective BBs, specifically nadolol. Nadolol, or propranolol if nadolol is unavailable, should be the preferred BB for treating symptomatic children with CPVT.

scholarly journals Challenging indication of cardioverter defibrillator implantation after sudden cardiac arrest in the very young. A case series of catecholaminergic polymorphic ventricular tachycardia secondary to De novo calmodulin p. Asn98Ser mutations

2021 ◽  
Author(s):  
Alice Maltret ◽  
Fatima Azzahrae Benaich ◽  
John Rendu ◽  
Véronique Fressart ◽  
Nathalie Roux-Buisson ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Ventricular Tachycardia ◽  
De Novo ◽  
Sudden Cardiac Arrest ◽  
Case Series ◽  
Catecholaminergic Polymorphic Ventricular Tachycardia ◽  
Polymorphic Ventricular Tachycardia ◽  
Icd Implantation ◽  
Loop Recorder ◽  
Cardioverter Defibrillator

Abstract Background Calmodulopathie is an emerging group of primary electrical disease with various, severe and early onset phenotype. Sudden cardiac arrest/death can be the first symptom and current medical management seams insufficient to prevent recurrences. Cardioverter defibrillator implantation (ICD) in the young is challenging and can be harmful. Case Summary We report the management of 2 very young boys (aged 3.5 and 5.5 years old) who survived a sudden cardiac arrest (SCA) due to calmodulin mutation responsible of a catecholaminergic polymorphic ventricular tachycardia phenotype. In both case, SCA had an adrenergic trigger. Despite SCA, ICD implantation was denied by the parents. After thorough discussion with the family, the patients were managed with solely betablocker treatment and loop recorder implantation. At last follow-up of 30 and 23 months respectively, there were no recurrence of any cardiac event. Discussion The benefits of ICD implantation at a very young age must be weighed against the risk complication. In the youngest, whom recreative activities are under constant supervision, the decision, jointly made with the parents, could be to postpone ICD.

scholarly journals Implantable cardioverter-defibrillators in previously undiagnosed patients with catecholaminergic polymorphic ventricular tachycardia resuscitated from sudden cardiac arrest

2019 ◽  
Vol 40 (35) ◽  
pp. 2953-2961 ◽  
Author(s):  
Christian van der Werf ◽  
Krystien V Lieve ◽  
J Martijn Bos ◽  
Conor M Lane ◽  
Isabelle Denjoy ◽  
...  
Keyword(s):  
Cardiac Arrest ◽  
Ventricular Tachycardia ◽  
Sudden Cardiac Arrest ◽  
Catecholaminergic Polymorphic Ventricular Tachycardia ◽  
High Rate ◽  
Polymorphic Ventricular Tachycardia ◽  
Implantable Cardioverter Defibrillators ◽  
Strict Adherence ◽  
Sentinel Event ◽  
Left Cardiac Sympathetic Denervation

Abstract Aims In patients with catecholaminergic polymorphic ventricular tachycardia (CPVT), implantable cardioverter-defibrillator (ICD) shocks are sometimes ineffective and may even trigger fatal electrical storms. We assessed the efficacy and complications of ICDs placed in patients with CPVT who presented with a sentinel event of sudden cardiac arrest (SCA) while undiagnosed and therefore untreated. Methods and results We analysed 136 patients who presented with SCA and in whom CPVT was diagnosed subsequently, leading to the initiation of guideline-directed therapy, including β-blockers, flecainide, and/or left cardiac sympathetic denervation. An ICD was implanted in 79 patients (58.1%). The primary outcome of the study was sudden cardiac death (SCD). The secondary outcomes were composite outcomes of SCD, SCA, appropriate ICD shocks, and syncope. After a median follow-up of 4.8 years, SCD had occurred in three patients (3.8%) with an ICD and none of the patients without an ICD (P = 0.1). SCD, SCA, or appropriate ICD shocks occurred in 37 patients (46.8%) with an ICD and 9 patients (15.8%) without an ICD (P < 0.0001). Inappropriate ICD shocks occurred in 19 patients (24.7%) and other device-related complications in 22 patients (28.9%). Conclusion In previously undiagnosed patients with CPVT who presented with SCA, an ICD was not associated with improved survival. Instead, the ICD was associated with both a high rate of appropriate ICD shocks and inappropriate ICD shocks along with other device-related complications. Strict adherence to guideline-directed therapy without an ICD may provide adequate protection in these patients without all the potential disadvantages of an ICD.

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