title: The use of external event monitoring (web-loop) in the elucidation of symptoms associated with arrhythmias in a general population.
abstract: OBJECTIVE
  To correlate arrhythmic symptoms with the presence of significant arrhythmias through the external event monitoring (web-loop).
  
  
  METHODS
  Between January and December 2011, the web-loop was connected to 112 patients (46% of them were women, mean age 52±21 years old). Specific arrhythmic symptoms were defined as palpitations, pre-syncope and syncope observed during the monitoring. Supraventricular tachycardia, atrial flutter or fibrillation, ventricular tachycardia, pauses greater than 2 seconds or advanced atrioventricular block were classified as significant arrhythmia. The association between symptoms and significant arrhythmias were analyzed.
  
  
  RESULTS
  The web-loop recorded arrhythmic symptoms in 74 (66%) patients. Of these, in only 14 (19%) patients the association between symptoms and significant cardiac arrhythmia was detected. Moreover, significant arrhythmia was found in 11 (9.8%) asymptomatic patients. There was no association between presence of major symptoms and significant cardiac arrhythmia (OR=0.57, CI95%: 0.21-1.57; p=0.23).
  
  
  CONCLUSIONS
  We found no association between major symptoms and significant cardiac arrhythmia in patients submitted to event recorder monitoring. Event loop recorder was useful to elucidate cases of palpitations and syncope in symptomatic patients.
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Hindalis Ballesteros
authors.initials: HB
authors.lastname: Epifanio
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Marcelo
authors.initials: M
authors.lastname: Katz
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Melania Aparecida
authors.initials: MA
authors.lastname: Borges
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Alessandra da Graça
authors.initials: Ada G
authors.lastname: Corrêa
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Fátima Dumas
authors.initials: FD
authors.lastname: Cintra
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Rodrigo Leandro
authors.initials: RL
authors.lastname: Grinberg
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Ana Cristina Pinotti Pedro
authors.initials: AC
authors.lastname: Ludovice
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Bruno Pereira
authors.initials: BP
authors.lastname: Valdigem
authors.affiliation: Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
authors.forename: Nilton José Carneiro da
authors.initials: NJ
authors.lastname: Silva
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, SP, Brazil.
authors.forename: Guilherme
authors.initials: G
authors.lastname: Fenelon
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001145:Arrhythmias, Cardiac / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology*; D016009:Chi-Square Distribution; D002648:Child; D002675:Child, Preschool; D015716:Electrocardiography, Ambulatory / Q000295:instrumentation* / Q000379:methods; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D013575:Syncope / Q000175:diagnosis* / Q000503:physiopathology*; D013997:Time Factors; D055815:Young Adult