Abstract:
STUDY OBJECTIVE:The Utstein guidelines recommend that emergency medical services (EMS)-witnessed cardiac arrests be considered separately from other out-of-hospital cardiac arrest cases. The objective of this study was to assess EMS-witnessed cardiac arrest and to determine predictors of survival in this group. METHODS:This prospective cohort included all adults with an EMS-witnessed cardiac arrest in the 21 communities of the Ontario Prehospital Advanced Life Support (OPALS) study. Systems provided a basic life support with defibrillation (BLS-D) level of care. Case and survival definitions followed the Utstein style. Descriptive and univariate methods (χ2 and t test) were used to characterize EMS-witnessed cardiac arrest. Multivariate logistic regression was undertaken to assess predictors of survival to hospital discharge. RESULTS:From January 1, 1991, to December 31, 1996, there were 9,072 cardiac arrest cases in the study communities. Of these, 610 (6.7%) were EMS-witnessed. The majority had preexisting cardiac or respiratory disease (81.5%) and experienced prodromal symptoms before EMS personnel arrived (91.4%). An initial rhythm of pulseless electrical activity was present in 50.1% of the patients, ventricular fibrillation/ventricular tachycardia in 34.2%, and asystole in 15.7%. Survival to discharge was 12.6%. Multivariate analysis identified the following as independent predictors of survival (odds ratio with 95% confidence intervals [CIs]): nitroglycerin use before EMS arrival: 2.3 (95% CI 1.2 to 4.5), prodromal symptoms of chest pain: 2.5 (95% CI 1.4 to 4.5) or dyspnea: 0.5 (95% CI 0.3 to 1.0), and unconsciousness on EMS arrival: 0.5 (95% CI 0.2 to 0.9). Patients with chest pain were more likely than dyspneic patients to experience ventricular fibrillation/ventricular tachycardia (62% versus 17%, P <.0001), and were 5 times more likely to survive (30.6% versus 6.3%, P <.0001). CONCLUSION:EMS-witnessed cases are clearly an important subset of out-of-hospital cardiac arrest and are characterized by 2 distinct symptom groups: chest pain and dyspnea. These symptoms are important predictors of survival and may also help determine underlying mechanisms before patient collapse. A later phase of the OPALS study will prospectively evaluate the impact of out-of-hospital advanced life support on the survival of victims of EMS-witnessed cardiac arrest. [De Maio VJ, Stiell IG, Wells GA, Spaite DW, for the OPALS Study Group. Cardiac arrest witnessed by emergency medical services personnel: descriptive epidemiology, prodromal symptoms, and predictors of survival. Ann Emerg Med. February 2000;35:138-146.].
journal_name
Ann Emerg Medjournal_title
Annals of emergency medicineauthors
De Maio VJ,Stiell IG,Wells GA,Spaite DW,OPALS Study Group.doi
10.1016/S0196-0644(00)70133-8subject
Has Abstractpub_date
2000-02-01 00:00:00pages
138-146issue
2eissn
0196-0644issn
1097-6760pii
S0196-0644(00)70133-8journal_volume
35pub_type
杂志文章abstract::Injury severity determination serves multiple purposes in trauma care systems by aiding prehospital triage, assisting clinical management, and facilitating outcome evaluation. Numerous authors have described methods for quantifying injury severity, most of which use physiologic status or anatomic injury. For prehospit...
journal_title:Annals of emergency medicine
pub_type: 杂志文章,评审
doi:10.1016/s0196-0644(86)80936-2
更新日期:1986-12-01 00:00:00
abstract:STUDY OBJECTIVE:Inflammation plays an important role in acute coronary syndromes, and some evidence indicates that patients with a more pronounced vascular inflammatory response have a poorer outcome. Soluble intercellular adhesion molecule-1 (sICAM-1) is a specific marker for vascular endothelial cell activation. The ...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1067/mem.2001.117199
更新日期:2001-09-01 00:00:00
abstract:STUDY OBJECTIVE:We measure the rate of emergency department (ED) specimen processing error reduction after implementation of an electronic physician order entry system paired with a bar-coded specimen labeling process. METHODS:A cohort pre- and postintervention study was conducted in the ED during a 61-month period en...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/j.annemergmed.2010.05.028
更新日期:2010-12-01 00:00:00
abstract:STUDY OBJECTIVE:Medication history is an essential part of patient assessment in emergency care. Patient-reported medication history can be incomplete. We study whether an electronic pharmacy-sourced prescription record can supplement the patient-reported history. METHODS:In a community hospital, we compared the patie...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/j.annemergmed.2013.04.014
更新日期:2013-09-01 00:00:00
abstract::A prospective study was conducted in the emergency departments of two community hospitals to assess the accuracy of Doppler ultrasonography performed by emergency physicians in the evaluation of patients with symptoms suggestive of deep-vein thrombosis. Seventy-eight extremities in 76 patients were evaluated by both D...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(05)82481-3
更新日期:1990-06-01 00:00:00
abstract::The medical antishock trouser (MAST) has been advocated as potentially beneficial in the resuscitation of patients in cardiac arrest. Currently available data indicate that the MAST will increase the blood pressure generated by external cardiopulmonary resuscitation. In addition, there may be an increased survival of ...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(84)80453-9
更新日期:1984-09-01 00:00:00
abstract::Inconsistency in contacting the families of acutely ill patients can negatively affect relatives and induce stress in emergency department staff. Role clarification and performance guidelines are discussed in the context of a telephone notification of relatives checklist, with staff advised in six specific interventio...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(82)80204-7
更新日期:1982-11-01 00:00:00
abstract:STUDY OBJECTIVE:The prevalence of agitation among emergency department (ED) patients is increasing. Physical restraints are routinely used to prevent self-harm and to protect staff, but are associated with serious safety risks. To date, characterization of physical restraint use in the emergency setting has been limite...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/j.annemergmed.2018.06.020
更新日期:2019-02-01 00:00:00
abstract::Transthoracic cardiac pacing historically has been relegated to the role of the technique of last resort in treating cardiac arrest. Recent studies have shown that this technique has a high rate of successful electrical capture, but often without mechanical activity. Survival rates have been shown to be dismal when th...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(84)80450-3
更新日期:1984-09-01 00:00:00
abstract:STUDY OBJECTIVE:Women and students underrepresented in medicine are less likely to apply for residency in emergency medicine. The latter are from racial or ethnic populations that are underrepresented as physicians relative to the general population. The factors that result in lower application rates from women and gro...
journal_title:Annals of emergency medicine
pub_type: 杂志文章,多中心研究
doi:10.1016/j.annemergmed.2019.04.008
更新日期:2019-12-01 00:00:00
abstract::A double-blind prospective study of 98 patients was carried out, but 57 (58%) returned for follow-up and form the basis of this report. Wound irrigation and debridement were found to be important in reducing infection. Hand wounds were most likely to become infected; face and scalp wounds were at low risk. Puncture wo...
journal_title:Annals of emergency medicine
pub_type: 临床试验,杂志文章
doi:10.1016/s0196-0644(80)80153-3
更新日期:1980-08-01 00:00:00
abstract:STUDY OBJECTIVE:This study measures the degree to which parents of patients, in the course of evaluation and treatment in a pediatric emergency department (ED), could report what they were waiting for. METHODS:Brief in-person interviews were conducted with parents of nonemergency patients during an ED visit. After the...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/j.annemergmed.2007.09.032
更新日期:2008-04-01 00:00:00
abstract:STUDY OBJECTIVE:We compare the ability of 5 established risk scores to identify patients with suspected acute coronary syndromes who are suitable for discharge after a modified single-presentation high-sensitivity troponin result. METHODS:This was a prospective observational study conducted in a UK district general ho...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/j.annemergmed.2015.07.006
更新日期:2015-12-01 00:00:00
abstract::We compared the abilities of the Trauma Score (TS), the Revised Trauma Score (RTS), and the Pediatric Trauma Score (PTS) to retrospectively identify severely injured children. TS, RTS, and PTS were computed on admission for 1,334 consecutive blunt and penetrating trauma victims 0 to 14 years old. Injury Severity Score...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(89)80930-8
更新日期:1989-10-01 00:00:00
abstract:STUDY OBJECTIVE:We compare test characteristics of abdominal computed tomography (CT) with and without oral contrast for identifying intra-abdominal injuries. METHODS:This was a planned subanalysis of a prospective, multicenter study of children (<18 years) with blunt torso trauma. Children imaged in the emergency dep...
journal_title:Annals of emergency medicine
pub_type: 杂志文章,多中心研究
doi:10.1016/j.annemergmed.2015.01.014
更新日期:2015-08-01 00:00:00
abstract::A mathematical model for tissue thermodilution was developed to study cerebral cortical perfusion before and after controlled perfusion arrest. Cerebral cortical perfusion rates are readily determined by this method. A thermistor was introduced into the subdural space and secured in direct contact with the frontal cor...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(83)80123-1
更新日期:1983-01-01 00:00:00
abstract:STUDY OBJECTIVE:Debate exists about the mortality benefit of administering antibiotics within either 1 or 3 hours of sepsis onset. We performed this meta-analysis to analyze the effect of immediate (0 to 1 hour after onset) versus early (1 to 3 hours after onset) antibiotics on mortality in patients with severe sepsis ...
journal_title:Annals of emergency medicine
pub_type: 杂志文章,meta分析
doi:10.1016/j.annemergmed.2020.04.042
更新日期:2020-10-01 00:00:00
abstract:STUDY OBJECTIVES:To demonstrate the degree to which pulse oximetry overestimates actual oxyhemoglobin (O2Hb) saturation in patients with carbon monoxide (CO) poisoning. This phenomenon has been reported in fewer than 20 humans in the English medical literature. METHODS:A retrospective chart review of 191 patients eval...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(97)70077-5
更新日期:1997-11-01 00:00:00
abstract:STUDY OBJECTIVE:We determine the accuracy of an age-adjusted D-dimer threshold to detect pulmonary embolism in emergency department (ED) patients older than 50 years and describe current ED practices when evaluating possible pulmonary embolism. METHODS:This was a retrospective study of ED encounters for suspected pulm...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/j.annemergmed.2015.07.026
更新日期:2016-02-01 00:00:00
abstract:STUDY OBJECTIVES:To determine if the use of verapamil in patients with contraindications is associated with adverse sequelae, thereby assessing whether process measures of the quality of care are correlated with patient outcomes. DESIGN:Retrospective chart review comparing the incidence of adverse outcomes and drug fa...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(05)81382-4
更新日期:1991-10-01 00:00:00
abstract:STUDY OBJECTIVES:To examine trends in legal handgun purchases from federally licensed dealers and specifically to describe recent changes in age and gender of purchaser and caliber of handguns purchased. METHODS:A cohort study was performed of the adult population of Washington state from 1950 through 1992 using a sta...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(98)70100-3
更新日期:1998-07-01 00:00:00
abstract::One hundred forty-one medical schools were surveyed to determine the emergency medicine core content topics and skills being taught in the curricula. Responses were obtained from 96 schools through two mailings and a telephone followup. Most topics surveyed were offered in the vast majority of medical schools (greater...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(86)80478-4
更新日期:1986-01-01 00:00:00
abstract:STUDY OBJECTIVE:To identify the arterial and mixed venous blood gas changes caused by different ventilatory strategies during resuscitation from ventricular fibrillation in a pig model of closed-chest cardiac compression. METHODS:A prospective randomized animal study was performed using 27 domestic pigs (body weight, ...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(98)70203-3
更新日期:1998-05-01 00:00:00
abstract:STUDY OBJECTIVE:We determine the incidence of serious bacterial infection in infants presenting to the emergency department (ED) with an apparent life-threatening event. METHODS:This was a prospective cohort study of infants younger than 12 months who were treated at an urban children's hospital ED during 1 year and w...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/j.annemergmed.2008.12.037
更新日期:2009-10-01 00:00:00
abstract::The 1982 US Festival, a three-day outdoor rock music festival, attracted close to 410,000 people. Through a private contractor, a group of physicians participated in the design, administration, and implementation of medical care for this event. Basic ambulatory care was provided by a multitiered approach, using emerge...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(86)80986-6
更新日期:1986-05-01 00:00:00
abstract:STUDY OBJECTIVE:It is often taught that acetaminophen-induced liver dysfunction occurs only after a latent period of 24 to 48 hours. This study was designed to evaluate the temporal profile of transaminase levels in patients with acetaminophen-induced hepatotoxicity. DESIGN:Prospective data collection using standard p...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(95)70237-7
更新日期:1995-07-01 00:00:00
abstract:STUDY OBJECTIVE:The objective was to quantify the analgesic effect of a dose of intravenous morphine, 0.1 mg/kg, to emergency department (ED) patients presenting in acute, severe pain. METHODS:This was a prospective convenience cohort of patients aged 21 to 65 years and presenting to an academic urban ED with acute, s...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/j.annemergmed.2005.03.010
更新日期:2005-10-01 00:00:00
abstract::In order to develop a rapid, simple test to differentiate toxic naphthalene from the less toxic mothball ingredient paradichlorobenzene, both types of mothballs were dissolved in isopropyl alcohol, ethanol, methanol, and turpentine. Twenty-five naphthalene and 25 paradichlorobenzene mothballs were weighed, randomly gr...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(85)80731-9
更新日期:1985-01-01 00:00:00
abstract:STUDY OBJECTIVE:Availability of timely follow-up care is essential in emergency medicine. We describe nonprice barriers to care experienced by callers reporting to be emergency department (ED) patients in need of follow-up care. METHODS:This was a secondary analysis of data collected during a survey of ambulatory clin...
journal_title:Annals of emergency medicine
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.annemergmed.2007.10.027
更新日期:2008-05-01 00:00:00
abstract::A 31-year-old white man with a core temperature of 60.8 F (16 C) and ventricular fibrillation was successfullly resuscitated using active core and external rewarming techniques. Rectal temperature at the time of reestablished electromechanical cardiac activity was 68 F (20 C), a temperature previously thought to be in...
journal_title:Annals of emergency medicine
pub_type: 杂志文章
doi:10.1016/s0196-0644(80)80339-8
更新日期:1980-02-01 00:00:00