De Maio, V J <br/><br/>
Cardiac arrest witnessed by emergency medical services personnel: descriptive epidemiology, prodromal symptoms, and predictors of survival. OPALS study group.  [electronic resource] 

 -  Annals of emergency medicine  Feb 2000 
 - 138-46 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article 
<br/><br/><label>ISSN: </label>0196-0644 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Age Factors<br/>Aged<br/>Aged, 80 and over<br/>Ambulances<br/>Cohort Studies<br/>Confidence Intervals<br/>Electric Countershock<br/>Emergency Medical Technicians<br/>Female<br/>Heart Arrest--epidemiology<br/>Humans<br/>Logistic Models<br/>Male<br/>Middle Aged<br/>Nitroglycerin--therapeutic use<br/>Odds Ratio<br/>Prognosis<br/>Prospective Studies<br/>Resuscitation<br/>Risk Factors<br/>Survival Analysis<br/>Tachycardia, Ventricular--mortality<br/>Time Factors<br/>Unconsciousness<br/>Vasodilator Agents--therapeutic use<br/>Ventricular Fibrillation--mortality