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Rev Esp Cardiol (Engl Ed). 2013 Apr;66(4):269-74. doi: 10.1016/j.rec.2012.09.014. Epub 2012 Dec 17.

Factors associated with mortality in out-of-hospital cardiac arrests attended in basic life support units in the Basque Country (Spain).

Author information

  • 1Bilbao SAMUR-Protección Civil, Ayuntamiento de Bilbao, Bilbao, Vizcaya, Spain. Electronic address: sendoa.ballesteros@gmail.com.
  • 2Departamento de Medicina Preventiva y Salud Pública, Facultad de Farmacia, Universidad del País Vasco, Vitoria-Gasteiz, Álava, Spain.
  • 3Departamento de Fisiología, Facultad de Farmacia, Universidad del País Vasco, Vitoria-Gasteiz, Álava, Spain.

Abstract

INTRODUCTION AND OBJECTIVES:

To describe the epidemiological characteristics of cardiac arrests attended in basic life support units in the Basque Country (Spain) and look for factors associated with failure of cardiopulmonary resuscitation.

METHODS:

We conducted an observational study during 18 months, including all out-of-hospital cardiopulmonary resuscitation provided by basic life support units. The variables defined in the Utstein-style were considered as independent and mortality as the dependent variable. We applied descriptive and analytical statistics and evaluated the magnitude of the association using a logistic regression model, which included variables with P<.05 in the bivariate analysis.

RESULTS:

Of 1050 cardiac arrests attended, 15.7% of patients were revived in situ. The presumed etiology was cardiac in 55.3% of cases and 71.4% occurred at home. Cardiopulmonary resuscitation was started before the arrival of the ambulance in 22.9% of cases and in 18.2% the rhythm of presentation was shockable. Variables associated with lower mortality were: shockable rhythms (relative risk=0.44; P=.003), patient aged<65 years (relative risk=0.44; P=.002), time to cardiopulmonary resuscitation<8 min (relative risk=0.56; P=.039), and out-of-home events (relative risk=0.55; P=.031).

CONCLUSIONS:

Cardiac arrest survival was low. Cardiopulmonary resuscitation before the arrival of the ambulance was rare. A shockable rhythm, age younger than 65 years, early cardiopulmonary resuscitation efforts, and a location away from home were associated with longer survival. It is necessary to develop strategies designed to reduce ambulance response time and educate the public in basic resuscitation.

Copyright © 2012 Sociedad Española de Cardiología. Published by Elsevier Espana. All rights reserved.

PMID:
24775616
[PubMed - indexed for MEDLINE]
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