Implementation trial of the basic life support termination of resuscitation rule: Reducing the transport of futile out-of-hospital cardiac arrests

Factors associated with initiation of medical advanced cardiac life support after out-of-hospital cardiac arrest

Background

Termination of resuscitation rule permits to stop futile resuscitative efforts by paramedics. In a different setting, the decision to withhold resuscitation by emergency physician could be based on different factors. We aimed to identify the factors associated with the initiation of a medical ACLS in out-of-hospital cardiac arrest patients.

Methods

We prospectively collected the characteristics of all out-of hospital cardiac arrest patients occurring in a French district between March 2010 and December 2013 and managed by the emergency medical system. We analyzed the factors associated with the initiation of medical ACLS.

Results

Medical ACLS was initiated in 69 % of the 2690 patients included in the register. ACLS patients were younger (69 years [55–80] vs. 84 years [77–90]) and more frequently men. A higher percentage of witnessed cardiac arrest and BLS were observed. Duration of no-flow was shorter in the ACLS patients, whereas BLS duration was longer. A higher proportion of shockable rhythm and application of AED were found in this group. Mains factors associated with the initiation of medical ACLS were a suspected cardiac cause (1.73 [1.30–2.30]) and use of an automated external defibrillator (1.59 [1.18–2.16]), whereas factors associated with no medical ACLS were higher age (0.93 [0.92–0.94]), absence of BLS (0.62 [0.52–0.73]), asystole (0.31 [0.18–0.51]) and location in nursing home (0.23 [0.11–0.51]).

Conclusions

The medical decision to not initiate ACLS in out-of-hospital cardiac arrest patients seems to rely on a complex combination of validated criteria used for termination of resuscitation and factors resulting from an intuitive perception of the outcome.

The impact of prehospital resuscitation research on in-hospital care

Since their introduction over 40 years ago, paramedics have been trained to deliver select advanced life support interventions in the community with the goal of reducing morbidity and mortality from cardiovascular disease and trauma. The ensuing decades witnessed a great deal of interest in paramedic care, with an exponential growth in prehospital resuscitation research. As part of the CJEM series on emergency medical services (EMS), we review recent prehospital research in out-of-hospital cardiac arrest and discuss how, in a novel departure from the origins of EMS, prehospital research is beginning to influence in-hospital care. We discuss emerging areas of study related to cardiopulmonary resuscitation (CPR) quality, therapeutic hypothermia, termination of resuscitation, and the use of end-tidal carbon dioxide measurement, as well as the subtle ripple effects that prehospital research is having on the broader understanding of the management of these critically ill patients.

Survival After Out-of-Hospital Cardiac Arrest in Relation to Age and Early Identification of Patients With Minimal Chance of Long-Term Survival

BACKGROUND

Survival after out-of-hospital cardiac arrest has increased during the last decade in Denmark. We aimed to study the impact of age on changes in survival and whether it was possible to identify patients with minimal chance of 30-day survival.

METHODS AND RESULTS

Using data from the nationwide Danish Cardiac Arrest Registry (2001─2011), we identified 21 480 patients ≥18 years old with a presumed cardiac-caused out-of-hospital cardiac arrest for which resuscitation was attempted. Patients were divided into 3 preselected age-groups: working-age patients 18 to 65 years of age (33.7%), early senior patients 66 to 80 years of age (41.5%), and late senior patients >80 years of age (24.8%). Characteristics in working-age patients, early senior patients, and late senior patients were as follows: witnessed arrest in 53.8%, 51.1%, and 52.1%; bystander cardiopulmonary resuscitation in 44.7%, 30.3%, and 23.4%; and prehospital shock from a defibrillator in 54.7%, 45.0%, and 33.8% (all P<0.05). Between 2001 and 2011, return of spontaneous circulation on hospital arrival increased: working-age patients, from 12.1% to 34.6%; early senior patients, from 6.4% to 21.5%; and late senior patients, from 4.0% to 15.0% (all P<0.001). Furthermore, 30-day survival increased: working-age patients, 5.8% to 22.0% (P<0.001); and early senior patients, 2.7% to 8.4% (P<0.001), whereas late senior patients experienced only a minor increase (1.5% to 2.0%; P=0.01). Overall, 3 of 9499 patients achieved 30-day survival if they met 2 criteria: had not achieved return of spontaneous circulation on hospital arrival and had not received a prehospital shock from a defibrillator.

CONCLUSIONS

All age groups experienced a large temporal increase in survival on hospital arrival, but the increase in 30-day survival was most prominent in the young. With the use of only 2 criteria, it was possible to identify patients with a minimal chance of 30-day survival.

General practitioner contribution to out-of-hospital cardiac arrest outcome: A national registry study

BACKGROUND

There is a wide variation in reported survival from out-of-hospital cardiac arrest (OHCA). One factor in this variation may be the contribution of general practitioners to pre-hospital resuscitation. Studies using self-reported data describe increased survival proportions when general practitioners are involved.

OBJECTIVES

This study aims to investigate the contribution of general practitioner involvement in out-of-hospital cardiac arrest events.

DESIGN AND SETTING

A retrospective observational study using data collected from ambulance records in the Republic of Ireland to describe general practitioner (GP) contribution to pre-hospital resuscitation attempts (n = 2369). Analysis is limited to patients with presumed cardiac cause and first arrest rhythm recorded as shockable (n = 510).

RESULTS

When a GP is present at scene (n = 199) patients are less likely to achieve return of spontaneous circulation (ROSC) (P < 0.001) or be transported to hospital (P < 0.001). When GPs participate in resuscitation (n = 92), patients are more likely to have collapsed in a public place (P < 0.01), receive bystander CPR (P < 0.001) and survive to hospital discharge (P < 0.001). Multiple logistic analysis of survival suggests that GP participation in resuscitation increases the odds of survival (4.6; 95% CI 1.6-13.3) and having collapsed in a public place increases chances of survival (5.8; 95% CI 2.1-15.7).

CONCLUSION

Our analysis suggests that in this subgroup, GP participation in OHCA resuscitation attempts is associated with improved patient survival. Furthermore, resuscitation is more likely to be ceased at scene when a GP is present, highlighting the role that GPs play in the compassionate management of death in unviable circumstances.