title: [Electrical storm in patients with prophylactic defibrillator implantation].
abstract: BACKGROUND
  Little is known about the prevalence of electrical storm, baseline characteristics and mortality implications of patients with implantable cardioverter defibrillator in primary prevention versus those patients without electrical storm. We sought to assess the prevalence, baseline risk profile and survival significance of electrical storm in patients with implantable defibrillator for primary prevention.
  
  
  METHODS
  Retrospective multicenter study performed in 15 Spanish hospitals. Consecutives patients referred for desfibrillator implantation, with or without left ventricular lead (at least those performed in 2010 and 2011), were included.
  
  
  RESULTS
  Over all 1,174 patients, 34 (2,9%) presented an electrical storm, mainly due to ventricular tachycardia (82.4%). There were no significant baseline differences between groups, with similar punctuation in the mortality risk scores (SHOCKED, MADIT and FADES). A clear trigger was identified in 47% of the events. During the study period (38±21 months), long-term total mortality (58.8% versus 14.4%, p<0.001) and cardiac mortality (52.9% versus 8.6%, p<0.001) were both increased among electrical storm patients. Rate of inappropriate desfibrillator intervention was also higher (14.7 versus 8.6%, p<0.001).
  
  
  CONCLUSIONS
  In the present study of patients with desfibrillator implantation for primary prevention, prevalence of electrical storm was 2.9%. There were no baseline differences in the cardiovascular risk profile versus those without electrical storm. However, all cause mortality and cardiovascular mortality was increased in these patients versus control desfibrillator patients without electrical storm, as was the rate of inappropriate desfibrillator intervention.
authors.affiliation: Servicio de Cardiología, Hospital Universitario Santiago de Compostela, España. Electronic address: moirmanero@gmail.com.
authors.forename: Moisés
authors.initials: M
authors.lastname: Rodríguez-Mañero
authors.affiliation: Servicio de Cardiología, Hospital Universitario Santiago de Compostela, España.
authors.forename: Cristina
authors.initials: C
authors.lastname: González-Cambeiro
authors.affiliation: Servicio de Cardiología, Hospital Universitario San Juan, Alicante, España.
authors.forename: Jose
authors.initials: J
authors.lastname: Moreno-Arribas
authors.affiliation: Servicio de Cardiología, Hospital Universitario Marqués de Valdecilla, Santander, España.
authors.forename: Víctor
authors.initials: V
authors.lastname: Expósito-García
authors.affiliation: Servicio de Cardiología, Hospital Clínico Universitario de Valencia, España.
authors.forename: Juan Miguel
authors.initials: JM
authors.lastname: Sánchez-Gómez
authors.affiliation: Servicio de Cardiología, Hospital Universitario Virgen Macarena, Sevilla, España.
authors.forename: Luis
authors.initials: L
authors.lastname: González-Torres
authors.affiliation: Servicio de Cardiología, Hospital Universitario Virgen del Rocío, Sevilla, España.
authors.forename: Álvaro
authors.initials: Á
authors.lastname: Arce-León
authors.affiliation: Servicio de Cardiología, Clínica Universidad de Navarra, Pamplona, España.
authors.forename: Hugo
authors.initials: H
authors.lastname: Arguedas-Jiménez
authors.affiliation: Servicio de Cardiología, Hospital de Basurto, Bilbao, España.
authors.forename: Larraitz
authors.initials: L
authors.lastname: Gaztañaga
authors.affiliation: Servicio de Cardiología Hospital Universitario La Paz, Madrid, España.
authors.forename: Oscar
authors.initials: O
authors.lastname: Salvador-Montañés
authors.affiliation: Servicio de Cardiología, Hospital Fundación Jiménez Díaz, Madrid, España.
authors.forename: Jose Antonio
authors.initials: JA
authors.lastname: Iglesias-Bravo
authors.affiliation: Servicio de Cardiología, Hospital Universitario La Fe, Valencia, España.
authors.forename: Ana Andrés La
authors.initials: AA
authors.lastname: Huerta
authors.affiliation: Servicio de Cardiología, Hospital Puerta del Mar, Cádiz, España.
authors.forename: Juan
authors.initials: J
authors.lastname: Fernández-Armenta
authors.affiliation: Servicio de Cardiología, Hospitalario Virgen de la Salud, Toledo, España.
authors.forename: Miguel Ángel
authors.initials: MÁ
authors.lastname: Arias
authors.affiliation: Servicio de Cardiología, Hospital Universitario Santiago de Compostela, España.
authors.forename: Luis
authors.initials: L
authors.lastname: Martínez-Sande
mesh_terms: D000368:Aged; D001145:Arrhythmias, Cardiac / Q000453:epidemiology / Q000517:prevention & control*; D017147:Defibrillators, Implantable; D055724:Electrophysiological Phenomena; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012189:Retrospective Studies; D017180:Tachycardia, Ventricular / Q000628:therapy
keywords: Desfibrilador automático implantable; Electrical storm; España; Implantable cardioverter-defibrillator; Miocardiopatía; Muerte súbita cardiaca; Myocardiopathy; Sudden cardiac death. Spain; Tormenta arrítmica