Raffay, Violetta

Objective Cardiac arrest is a daunting medical emergency. The aim of the present study was to assess whether the combination of adrenaline and glucagon would improve initial resuscitation success, 48-hour survival, and neurologic outcome compared with adrenaline alone in a porcine model of ventricular fibrillation. Methods Ventricular fibrillation was induced in 20 healthy Landrace/Large White piglets, which were subsequently left untreated for 8 minutes. The animals were randomized to receive adrenaline alone (n = 10, group C) and adrenaline plus glucagon (n = 10, group G). All animals were resuscitated according to the 2010 European Resuscitation Council guidelines. Hemodynamic variables were measured before arrest, during arrest and resuscitation, and during the first 60 minutes after return of spontaneous circulation. Survival and a neurologic alertness score were measured at 48 hours after return of spontaneous circulation. Results Return of spontaneous circulation was achieved in 8 animals (80%) from group C and 10 animals (100%) from group G (P =.198). A significant gradual increase in coronary perfusion pressure and diastolic aortic pressure over time, which started 1 minute after the onset of cardiopulmonary resuscitation, was observed. Three animals (30%) from group C and 9 animals (90%) from group G survived after 48 hours (P =.006), whereas neurologic examination was significantly better in the animals of group G (P <.001). Conclusions In this porcine model of prolonged ventricular fibrillation, the addition of glucagon to adrenaline improves hemodynamics during resuscitation and early postresuscitation period and may increase survival.

Human exposure to high altitude is increasing, through inhabitation of areas of high altitude, expansion of tourism into more remote areas, and air travel exposing passengers to typical altitudes equivalent to 8005 ft (2440 m). With ascent to high altitude, a number of acute and chronic physiological changes occur, influencing all systems of the human body. When considering that cardiac arrest is the second most common cause of death in the mountains and that up to 60% of the elderly have significant heart disease or other health problems, these changes are of particular importance as they may have a significant impact on resuscitation efforts. Current guidelines for resuscitation lack specific recommendations regarding treatment of cardiac arrest after ascent to high altitude or in aircraft. Therefore, we performed a comprehensive search in PubMed, CINAHL, Cochrane Library, and Scopus databases for studies relevant to resuscitation at high altitude. As no randomized trials evaluating the effects of physiological changes after ascent to high altitude on cardiopulmonary resuscitation were identified, our search was expanded to include all studies addressing important aspects on high altitude physiology which could have a potential impact on the resuscitation of cardiac arrest victims. The aim of this review is to discuss the major physiological changes occurring after ascent to high altitude and their potential effects on cardiopulmonary resuscitation. Based on the available data, specific suggestions are proposed regarding resuscitation at high altitude.

IntroductionCardiopulmonary resuscitation (CPR) is often started irrespective of comorbidity or cause of arrest. We aimed to determine the prevalence of perception of inappropriate CPR of the last cardiac arrest encountered by clinicians working in emergency departments and out-of-hospital, factors associated with perception, and its relation to patient outcome. MethodsA cross-sectional survey was conducted in 288 centres in 24 countries. Factors associated with perception of CPR and outcome were analyzed by Cochran-Mantel-Haenszel tests and conditional logistic models. ResultsOf the 4018 participating clinicians, 3150 (78.4%) perceived their last CPR attempt as appropriate, 548 (13.6%) were uncertain about its appropriateness and 320 (8.0%) perceived inappropriateness; survival to hospital discharge was 370/2412 (15.3%), 8/481 (1.7%) and 8/294 (2.7%) respectively. After adjusting for country, team and clinician’s characteristics, the prevalence of perception of inappropriate CPR was higher for a non-shockable initial rhythm (OR 3.76 [2.13–6.64]; P < .0001), a non-witnessed arrest (2.68 [1.89–3.79]; P < .0001), in older patients (2.94 [2.18–3.96]; P < .0001, for patients >79 years) and in case of a “poor” first physical impression of the patient (3.45 [2.36–5.05]; P < .0001). In accordance, non-shockable and non-witnessed arrests were both associated with lower survival to hospital discharge (0.33 [0.26−0.41]; P < 0.0001 and 0.25 [0.15−0.41]; P < 0.0001, respectively), as were older patient age (0.25 [0.14−0.44]; P < 0.0001 for patients >79 years) and a “poor” first physical impression (0.26 [0.19–0.35]; P < 0.0001). ConclusionsThe perception of inappropriate CPR increased when objective indicators of poor prognosis were present and was associated with a low survival to hospital discharge. Factoring clinical judgment into the decision to (not) attempt CPR may reduce harm inflicted by excessive resuscitation attempts.

Background: Europe is a patchwork of 47 countries with legal, cultural, religious, and economic differences. A prior study suggested variation in ethical resuscitation/end-of-life practices across Europe. This study aimed to determine whether this variation has evolved, and whether the application of ethical practices is associated with emergency care organisation. Methods: A questionnaire covering four domains of resuscitation ethics was developed based on consensus: (A) Approaches to end-of-life care and family presence during cardiopulmonary resuscitation; (B) Determinants of access to best resuscitation and post-resuscitation care; (C) Diagnosis of death and organ donation (D) Emergency care organisation. The questionnaire was sent to representatives of 32 countries. Responses to 4-choice or 2-choice questions pertained to local legislation and common practice. Positive responses were graded by 1 and negative responses by 0; grades were reconfirmed/corrected by respondents from 31/32 countries (97%). For each resuscitation/end-of-life practice a subcomponent score was calculated by grades' summation. Subcomponent scores' summation resulted in domain total scores. Results: Data from 31 countries were analysed. Domains A, B, and D total scores exhibited substantial variation (respective total score ranges, 1-41, 0-19 and 9-32), suggesting variable interpretation and application of bioethical principles, and particularly of autonomy. Linear regression revealed a significant association between domain A and D total scores (adjusted r2 = 0.42, P < 0.001). Conclusions: According to key experts, ethical practices and emergency care still vary across Europe. There is need for harmonised legislation, and improved, education-based interpretation/application of bioethical principles. Better application of ethical practices may be associated with improved emergency care organisation.