Introduction: The most appropriate airway management technique for use by paramedics in out-of-hospital cardiac arrest is yet to be determined and evidence relating to the influence of airway management strategy on outcome remains equivocal. In cases where return of spontaneous circulation (ROSC) occurs following out-of-hospital cardiac arrest, patients may undergo direct transfer to a specialist heart attack centre (HAC) where the post resuscitation 12 lead ECG demonstrates evidence of ST elevation myocardial infarction. To date, no studies have investigated the role of airway management strategy on outcomes in this sub-set of patients. The AMICABLE (Airway Management In Cardiac Arrest, Basic, Laryngeal mask airway, Endotracheal intubation) study therefore sought to investigate the influence of prehospital airway management strategy on outcomes in patients transferred by the ambulance service directly to a HAC post ROSC. Methods: Adults with ROSC post out-of-hospital cardiac arrest who met local criteria for transfer to a HAC were identified prospectively. Ambulance records were reviewed to determine prehospital airway management approach and collect physiological and demographic data. HAC notes were obtained to determine in-hospital course and quantify neurological outcome via the Cerebral Performance Category (CPC) scale. Neurologically intact survivors were contacted post discharge to assess quality of life via the SF-36 health survey. Statistical analyses were performed via Chi-square, Mann Whitney U test, odds ratios, and binomial logistic regression. Results: A total of 220 patients were recruited between August 2013 and August 2014, with complete outcome data available for 209. The age of patients ranged from 22-96 years and 71.3% were male (n=149). Airway management was undertaken using a supraglottic airway (SGA) in 72.7% of cases (n=152) with the remainder undergoing endotracheal intubation (ETI). There was no significant difference in the proportion of patients with good neurological outcome (CPC 1&2) between the SGA and ETI groups (p=.286). Similarly, binomial logistic regression incorporating factors known to influence outcome demonstrated no significant difference between the SGA and ETI groups (Adjusted OR 0.725, 95% CI 0.337-1.561). Clinical and demographic variables associated with good neurological outcome included the presence of a shockable rhythm (p < .001), exposure to angiography (p < .001), younger age (p < .001) and shorter time to ROSC (p < .001). Due to an inadequate response rate (25.4%, n=15) analysis of SF36 data was limited to descriptive statistics. Limitations: The study only included patients who achieved ROSC and met the criteria for direct transfer to a HAC. Results are therefore not generalisable to more heterogenous resuscitation populations. Accuracy of clinical decision making and ECG interpretation were not assessed and therefore some patients included in the study may have been inappropriately transferred to a HAC. The low SF-36 survey response rate limited the level of neurological outcome analysis that could be undertaken. Conclusion: In this study, there was no significant difference in the proportion of good neurological outcomes in patients managed with SGA versus ETI during cardiac arrest. Further research incorporating randomised controlled trials is required to provide more definitive evidence in relation to the optimal airway management strategy in out-of-hospital cardiac arrest.

L’insuffisance cardiaque aigue est une émergence médicale qui nécessite une prise en charge multidisciplinaire. L’Extracorporeal Life Support (ECLS) peut être envisagé comme option thérapeutique pour les formes d’insuffisance cardiaque aigue réfractaire au traitement conventionnel. L’objectif de ce projet de recherche clinique est de fournir une vue d’ensemble de l’ECLS dans la prise en charge du choc cardiogénique et de l’arrêt cardiaque réfractaire. L’intoxication médicamenteuse et la myocardite sont les meilleures indications à l’implantation de l’ECLS en considération de leur potentiel de récupération myocardique très élevé. La défaillance primaire du greffon après transplantation cardiaque et l’infarctus du myocarde présentent des résultats plus mitigés avec l’ECLS en raison d’une physiopathologie plus complexe. Le choc cardiogénique postcardiotomie après une intervention de chirurgie cardiaque montre des résultats décevants en raison du profile préopératoire des patients. L’arrêt cardiaque aussi exige une prise en charge immédiate et l’ECLS peut être considéré comme une solution thérapeutique de sauvetage. Une meilleure sélection des patients s’impose afin d’améliorer les résultats de l’ECLS pour l’arrêt cardiaque réfractaire intrahospitalier. Les résultats de l’ECLS pour l’arrêt cardiaque réfractaire extrahospitalier sont dictés principalement par le temps de réanimation cardio-pulmonaire et le rythme cardiaque. Les rythmes non choquables pourraient être considérés comme une contre-indication formelle à l’utilisation de l’ECLS autorisant une concentration de nos efforts sur les rythmes choquables où les chances de survie sont plus importantes / Acute heart failure is a clinical situation requiring a prompt multidisciplinary approach. Extracorporeal Life Support (ECLS) could represent a therapeutic option for acute heart failure refractory to standard maximal treatment. The aim of this report is to offer an overview of ECLS in the management of refractory cardiogenic shock and cardiac arrest. Drug intoxication and myocarditis are the best indications of ECLS in consideration of their high potential of myocardial recovery. Primary graft dysfunction after heart transplantation and acute myocardial infarction show reduced survival rates owing to their more complex pathophysiology. Postcardiotomy cardiogenic shock after cardiac surgery operations displays poor outcomes due to the preoperative profile of the patients. ECLS could be also considered as a rescue solution for refractory cardiac arrest. A better selection of in-hospital cardiac arrest patients is mandatory to improve ECLS outcomes. In-hospital cardiac arrest patients with a reversible cause like drug intoxication and acute coronary syndrome should benefit from ECLS whereas end-stage cardiomyopathy and postcardiotomy patients with an unclear cause of cardiac arrest should be contraindicated to avoid futile support. ECLS for refractory out-ofhospital cardiac arrest should be limited in consideration of its poor, especially neurological, outcome and the results are mainly limited by the low-flow duration and cardiac rhythm. Nonshockable rhythms could be considered as a formal contraindication to ECLS for refractory out-of-hospital cardiac arrest allowing a concentration of our efforts on the shockable rhythms, where the chances of success are substantial

Introdução: O prognóstico da parada cardiorrespiratória (PCR) em ritmo não chocável (assistolia/atividade elétrica sem pulso) é ruim e não melhorou significativamente nas últimas décadas. Embora a epinefrina seja o vasopressor recomendado, há evidências de que ela eleva o consumo de oxigênio, reduz a pressão de perfusão subendocárdica, causa grave disfunção miocárdica e piora a microcirculação cerebral durante a ressuscitação cardiopulmonar. Vasopressina foi muito estudada nos últimos anos e não se mostrou superior à epinefrina. Naloxona e terlipressina têm sido cogitadas como potenciais vasopressores no tratamento da PCR, entretanto há poucos estudos publicados e os resultados são controversos e inconclusivos. Objetivos: Avaliar os efeitos hemodinâmicos e metabólicos da terlipressina ou naloxona na PCR induzida por hipóxia e compará-las com o tratamento-padrão (epinefrina ou vasopressina). Métodos: Estudo experimental, randomizado, cego e controlado. Ratos Wistar adultos, machos, foram anestesiados, submetidos a traqueostomia e ventilados mecanicamente. A PCR foi induzida por obstrução da traqueia e mantida por 3,5 minutos. Em seguida, os animais foram ressuscitados de forma padronizada e randomizados em um dos grupos: placebo (n = 7), vasopressina (n = 7), epinefrina (n = 7), naloxona (n = 7) ou terlipressina (n = 21). Variáveis hemodinâmicas foram monitorizadas durante todo o experimento (via cateter intra-arterial e intraventricular) e mensuradas na base, no 10o (T10), 20o (T20), 30o (T30), 45o (T45) e 60o (T60) minutos pós-PCR. Amostras de sangue arterial foram coletadas para gasometria, hemoglobina, bioquímica e lactato em quatro momentos [base, 11o (T11), 31o (T31), e 59o (T59) minutos pós-PCR]. Resultados: Os grupos foram homogêneos e não houve diferença significativa entre eles nas variáveis de base. O retorno da circulação espontânea ocorreu em 57% dos animais no grupo placebo (4 de 7) e 100% nos demais grupos (p = 0,002). A ! sobrevida em 1 hora foi de 57% no grupo placebo, 71,4% no grupo epinefrina, 90,5% no grupo terlipressina e de 100% nos demais grupos. Comparado com o grupo epinefrina, o grupo terlipressina teve maiores valores de PAM no T10 (164 vs 111 mmHg; p = 0,02), T20 (157 vs 97 mmHg; p < 0,0001), T30 (140 vs 67 mmHg; p < 0,0001), T45 (117 vs 67 mmHg; p = 0,002) e T60 (98 vs 62 mmHg; p = 0,026). O lactato arterial no grupo naloxona foi significativamente menor quando comparado ao grupo epinefrina, no T11 (5,15 vs 8,82 mmol/L), T31 (2,57 vs 5,24 mmol/L) e T59 (2,1 vs 4,1 mmol/L)[p = 0,002]. Ao longo da 1a hora pós-PCR, o grupo naloxona apresentou o melhor perfil do excesso de bases (-7,78 mmol/L) quando comparado ao grupo epinefrina (-12,78 mmol/L; p = 0,014) e ao grupo terlipressina (-11,31 mmol/L; p = 0,024). Conclusões: Neste modelo de PCR induzida por hipóxia em ratos, terlipressina e naloxona foram eficazes como vasopressores na RCP e apresentaram melhor perfil metabólico que a epinefrina. A terlipressina resultou em uma maior estabilidade hemodinâmica na 1a hora pós-PCR comparada com a epinefrina ou a vasopressina. Os efeitos metabólicos favoráveis da naloxona não são explicados pelos valores da PAM / Introduction: The prognosis of cardiac arrest (CA) with nonshockable rhythm (asystole/pulseless electrical activity) is poor and not improved significantly in recent decades. Epinephrine is the most commonly used vasopressor, although there is evidence that its use correlates with myocardial dysfunction and worsens the cerebral microcirculation. Vasopressin has been widely studied in recent years and was not superior to epinephrine. Naloxone and terlipressin have been considered as potential vasopressors in the treatment of CA, however, there are few published studies and the results are controversial and inconclusive. Objectives: To evaluate the hemodynamic and metabolic effects of terlipressin or naloxone in CA induced by hypoxia and compare with standard treatment with epinephrine or vasopressin. Methods: Experimental, randomized, blinded and controlled trial. Adult male Wistar rats were anesthetized, the proximal trachea was surgically exposed, and a 14-gauge cannula was inserted 10 mm into the trachea to the larynx. They were mechanically ventilated and monitored. The CA was induced by tracheal obstruction and maintained for 3.5 minutes. Subsequently, the animals were resuscitated using standard maneuvers and randomized to one of groups: placebo (n=7), vasopressin (n=7), epinephrine (n=7), naloxone (n=7) or terlipressin (n=21). Hemodynamic variables were monitored throughout the study (intra-arterial and intra-ventricular catheter) and measured at baseline, in the 10th (T10), 20th (T20), 30th (T30), 45th (T45) and 60th (T60) minute post-cardiac arrest. Arterial blood samples were collected for hemoglobin, biochemistry, blood gases and lactate at four moments: baseline, 11th (T11), 31st (T31) and 59th (T59) minute post-cardiac arrest. Results: The groups were homogenous and there were no significant differences among them regarding the baseline variables. The return of spontaneous circulation (ROSC) occurred in 57% of the animals (4 of 7) in the placebo group and in 100% in the ! other groups (P=0.002). One-hour survival was 57% in the placebo group, 71.4% in the epinephrine group, 90.5% in the terlipressin and 100% in the naloxone group. Compared with the epinephrine group, the terlipressin groups had a significantly higher MAP at the T10 (164 x 111 mmHg; P=0.02), T20 (157 x 97 mmHg; P<0.0001), T30 (140 x 67 mmHg; P=0.0001), T45 (117 x 67 mmHg; P=0.002) and T60 (98 x 62 mmHg; P= 0.026). The blood lactate in naloxone group was significantly lower when compared to epinephrine group in the T11 (5.15 x 8.82 mmol/L), T31 (2.57 x 5.24 mmol/L) and T59 (2.1 x 4.1)[P=0.002]. Along the first hour after cardiac arrest, the naloxone group showed the best profile of base excess (- 7.78 mmol/L) when compared to epinephrine (-12.78 mmol/L, P= 0.014) and terlipressin group (-11.31 mmol/L, P=0.024). Conclusions: In this model of CA induced by hypoxia in rats, terlipressin and naloxone were effective as vasopressors in resuscitation and had better metabolic profile compared to epinephrine. Terlipressin resulted in higher hemodynamic stability in the first hour after CA and significantly better than epinephrine or vasopressin. The favorable metabolic effects of naloxone are not explained by the values of MAP

The thesis is devoted to the issue of non-professional first aid provision. Everyone should have knowledge of first aid procedures, because in the Czech Republic there is a statutory duty to provide first aid. It is therefore necessary to start training as soon as possible, already in school-aged children. The thesis is focused on pupils of 8th grade of primary schools in České Budějovice and their knowledge of first aid. The thesis is divided into two parts, theoretical and practical. In the theoretical part basic information on first aid is given. News and changes brought about by global directive in resuscitation Guidelines 2005. It also gives and account of individual diseases with brief descriptions, causes and emergency procedures. The last two chapters are focused on the Red Cross activities and first aid training in schools. The practical part examines the attitude of pupils to first-aid provision and their first aid knowledge. In this section, the following two objectives and hypotheses were stated: The first objective is to determine the pupils´ interest to get involved in first aid training. The other objective is to monitor the first aid knowledge and skills of primary school pupils before and after the training implementation. Hypothesis 1 assumes that primary school pupils are interested in obtaining information relating to first aid. The second hypothesis determines if the pupils´ awareness got improved after the training. To meet the goals of the thesis quantitative research was used. To pupils interested in the issue, professional instruction in first aid, led by a worker of the Red Cross in České Budějovice, was provided. Based on the pre and post test, a questionnaire survey was carried out when the pupils responded in writing to questions in two questionnaires. The first questionnaire contained 19 and the second 21 questions. Total 122 questionnaires were distributed. The goals of the thesis were met and after the questionnaires evaluation, both my hypothesis were confirmed. The research has shown the pupils' interest in the issue and a better understanding after the training. In order to improve basic first aid knowledge in primary school pupils it would certainly be beneficial to put emphasis on first aid training in schools.

Introdução: Apesar do desenvolvimento tecnológico, permanece baixa a sobrevida hospitalar das vítimas de parada cardiorrespiratória extra-hospitalar. Há importante dúvida na literatura quanto à retenção de habilidades de ressuscitação cardiopulmonar (RCP) e a periodicidade adequada de treinamento para manutenção dessas habilidades. O presente estudo investigou a retenção, em alunos a partir de treinamento no primeiro semestre de ingresso no curso médico, das habilidades práticas de RCP até 42 meses após o referido treinamento. Métodos: Estudo de corte transversal, realizado com 298 alunos de graduação de uma faculdade de Medicina, treinados com base nas diretrizes de ressuscitação de 2010 da American Heart Association. Foram avaliados 205 alunos sem retreinamento das habilidades, divididos em quatro grupos conforme o tempo decorrido desde o treinamento de ingresso: 73 alunos após 1 mês, 55 após 18 meses, 41 após 30 meses e 36 após 42 meses. A análise da retenção das habilidades foi comparada com 93 alunos que referiram ter realizado retreinamento em RCP. Dezenove habilidades de RCP e nove potenciais erros de técnica na execução das ventilações pulmonares e compressões torácicas foram avaliados por meio de simulação realística e revisados com utilização de filmagem e avaliadores independentes. Resultados: A média de retenção das dezenove habilidades nos alunos sem retreinamento foi: 90% após 1 mês, 74% após 18 meses, 62% após 30 meses e 61% após 42 meses (p < 0,001). Nos alunos que referiram retreinamento, a retenção foi de 74% após 18 meses, 70% após 30 meses e 66% após 42 meses do treinamento inicial. Realizada curva de predição da retenção de habilidades, com estimativa de 80% das habilidades mantidas após 10 meses, 70% após 21 meses e 60% após 42 meses. A profundidade das compressões torácicas foi a habilidade com maior retenção ao longo do tempo (87,8%), sem diferença estatística entre os quatro grupos. Houve aumento da prevalência de compressões realizadas com menos de 5 cm de profundidade quando realizadas em frequência maior que 120 por minuto. A média da frequência de compressões torácicas obtidas nos grupos após 1, 18, 30 e 42 meses foi, respectivamente, 114, 114, 104 e 108 compressões por minuto; 104 (50,7%) alunos mantiveram frequência média entre 100-120 por minuto. As ventilações pulmonares apresentaram diminuição progressiva de retenção, de 93% após 1 mês até 19% após 42 meses (p < 0,001). Todos os alunos efetivaram o choque com o desfibrilador externo automático, porém com o grupo após 1 mês do treinamento com menor tempo para efetivação do choque e maior prevalência de posicionamento adequado das pás do desfibrilador. Conclusões: O presente estudo demonstrou diferentes níveis de retenção para as habilidades de RCP e diferentes níveis de decréscimo de tais habilidades ao longo de 42 meses. A profundidade das compressões torácicas e o uso do desfibrilador externo automático foram as habilidades com maior retenção ao longo do tempo. Treinamentos adicionais ao longo do curso de Medicina atenuaram a perda de habilidades, mas sem retorno ao desempenho observado após 1 mês do treinamento. Sugerimos que o intervalo mínimo de retreinamento para manutenção de pelo menos 70% das habilidades deva ser de 18 a 24 meses / Introduction: Despite technological development, the survival of victims of out-ofhospital cardiac arrest remains low. There are important questions in the literature regarding the retention of cardiopulmonary resuscitation (CPR) skills and the ideal frequency of retraining required to enhance retention of skills. This study investigated the retention of practical CPR skills by medical students over 42 months after training in the first semester of admission to the medical course. Methods: A cross-sectional study was conducted with 298 undergraduate medical students who were trained based on the 2010 American Heart Association resuscitation guidelines. A total of 205 students divided into four groups according to the time elapsed since the entrance training were evaluated without retraining (73 students after 1 month, 55 students after 18 months, 41 students after 30 months and 36 students after 42 months). The analysis of the retention of skills was compared to 93 students who reported having performed retraining in CPR. Nineteen CPR skills and nine potential technical errors in ventilations and chest compressions were evaluated by realistic simulation and reviewed using filming by independent examiners. Results: The mean retention of the nineteen skills in not retrained students was: 90% after 1 month, 74% after 18 months, 62% after 30 months and 61% after 42 months (p < 0.001). In retraining students, retention was 74% after 18 months, 70% after 30 months, and 66% after 42 months of initial training, with statistical difference between the students with and without retraining in the 30-month group (p=0.005). The estimation of mean skill retention was 80% after 10 months, 70% after 21 months and 60% after 42 months. The depth of chest compressions was the skill with greater retention over time (87.8%), with no statistical difference among groups. There was an increase in the prevalence of compressions performed with less than 5 cm depth when performed at a frequency greater than 120 per minute. The mean chest compressions rate obtained in the groups after 1, 18, 30 and 42 months were 114, 114, 104 and 108 per minute, respectively, and 104 (50.7%) students maintained a mean frequency of 100-120 per minute. Pulmonary ventilation showed a progressive decrease in retention from 93% after 1 month to 19% after 42 months (p < 0.001). All students delivered the shock with the automated external defibrillator; however, for the group one month post-training, the time for the application of the shock was lower, and the prevalence of adequate positioning of the defibrillator pads was greater. Conclusion: This study showed different retention levels for CPR skills and different decrease levels of these skills over 42 months. Depth of chest compressions and use of automated external defibrillator were the skills with the highest retention over time. Additional training throughout the medical course attenuated the loss of skills, but no return to the initial performance achieved after 1 month. We suggest that the minimum retraining interval for maintenance of at least 70% of skills should be 18 to 24 months

Introdução: O desenvolvimento e a aplicação das Tecnologias de Informação e Comunicação associadas à internet exercem mudanças no processo de ensino aprendizagem e podem contribuir para a educação permanente em enfermagem, favorecendo a capacitação de enfermeiros, para reconhecer imediatamente a situação de parada cardiorrespiratória (PCR) de adultos e sistematizar as intervenções de suporte avançado de vida (SAV), a fim de que colaborem para o sucesso da reanimação cardiopulmonar e maior sobrevida dos pacientes. Objetivos: Desenvolver e avaliar a qualidade do curso on-line para enfermeiros sobre suporte avançado de vida nos casos de parada cardiorrespiratória em adultos. Método: Pesquisa metodológica aplicada, na modalidade de produção tecnológica de natureza quantitativa, exploratória e descritiva. Para o desenvolvimento do curso on-line, utilizou-se o modelo de Design Instrucional Contextualizado (DIC). A seleção dos participantes foi aleatória, intencional e não probabilística. Participaram do estudo dezesseis enfermeiros especialistas na área de urgência e emergência adultos e/ou de educação on-line. A coleta de dados ocorreu no período de novembro a dezembro de 2016. A avaliação do curso on-line foi baseada em critérios validados de Avaliação da Qualidade de Objetos de Aprendizagem. Resultados: O curso on-line foi implementado no ambiente virtual de aprendizagem (AVA) Moodle®, em nove unidades de aprendizagem e obtiveram índices de alta e boa qualidade em quinze (75%) critérios referentes à pertinência, contextualização, qualidade da informação, navegação, referências, portabilidade, correção de conteúdo, clareza das informações, facilidade de aprendizagem na interação e de localização das informações, interatividade, eficiência de utilização, utilização de recursos audiovisuais, ergonomia e estética. Foram avaliados cinco (25%) critérios como qualidade mediana relacionados à facilidade de retorno, uso de marcas especiais, gestão de erros, múltiplas janelas, ajuda aos usuários. Conclusões: os resultados mostraram que os referenciais teórico-metodológicos e pedagógicos adotados possibilitaram o desenvolvimento do curso on-line sobre SAV em PCR de adultos conferindo-lhe viabilidade de integrar tecnologias e estratégias educacionais inovadoras na implementação de capacitação e atualização de enfermeiros nas situações de emergência utilizando AVA. / Introduction: The development and application of Information and Communication Technologies associated to internet bring evidence-based changes in the processes of teaching and learning and may contribute for permanent education in nursing, promoting the training and the qualification of nurses on recognition of situations of cardiorespiratory arrest (CPR) in adults and on the systematization of advanced life-support interventions, in order to collaborate for the success of cardiopulmonary resuscitation and longer survival of adult patients. Objectives: Develop and evaluate the quality of the on-line course on advanced life support in adult cardiorespiratory arrest for nurses. Method: Applied methodological research, in the form of technological production based on quantitative, exploratory and descriptive research. For the development of the on-line course the Contextualized Instrumental Design (DIC) model was used. The selection of participants was random, intentional and non-probabilistic. Sixteen nurses specialists in the area of urgency and emergency to adult and/or on-line education participated in the study. Data collection has taken place from November to December 2016. The evaluation of the on-line course was based on assessed criteria of Learning Object Quality Assessment. Results: The on-line course was implemented in the Moodle® virtual learning environment in nine learning units and obtained high quality indexes in fifteen (75%) criteria regarding pertinence, contextualization, information quality, navigation, references, portability, content correction, technical information, ease of learning in interaction and location of information, interactivity, efficiency of use, use of audiovisual resources, ergonomics and aesthetics. Five (25%) criteria were evaluated a median quality related to ease of return, use of special brands, error management, multiple windows, and user assistance were also evaluated. Conclusions: The results showed that the theoretical, methodological and pedagogical frameworks adopted allowed the development of the on-line course on life-support interventions in adult CPR focused on adult learning, making it possible to integrate innovative educational technologies in the implementation of training and professional updating for nurses in the emergency situations using virtual learning environment.

À bord des aéronefs de transport commercial, lorsqu’un passager est victime d’un arrêt cardio-respiratoire, les membres d’équipage de cabine, appelés « PNC » (Personnel Navigant Commercial) dans la terminologie aéronautique, interviennent comme tout secouriste en initiant la chaîne de survie afin d’améliorer le pronostic vital de ce dernier. Dotés d’une formation très sérieuse et périodiquement mise à niveau, les PNC sont capables de prendre en charge des situations d’urgence médicales et de donner les premiers secours liés aux urgences potentielles, aux états de malaise, ainsi que ceux liés aux circonstances et à un environnement particulier. La réanimation cardio-pulmonaire, tâche exceptionnelle et rare en vol, génère le plus fréquemment des émotions négatives ainsi que du stress auprès des PNC. Cette recherche aborde le stress des membres d’équipage de cabine dans la prise en charge d’une réanimation cardio-pulmonaire en vol selon une approche psychologique et plus singulièrement celle en relation avec la théorie transactionnelle de Lazarus et Folkman (1984) dont l’évaluation cognitive et les « copings » des individus occupent une place centrale. Élaborée à partir d’un recueil de données construit par entretiens semi-directifs auprès d’un groupe de 32 PNC volontaires exerçant leur profession sur des aéronefs de petite capacité de transport passagers, elle se propose d’identifier les facteurs influençant le stress des PNC selon une perspective synchronique. Aussi, afin de cerner le plus d’explication possible de la variance du stress, nous avons pris en compte deux variables personnelles, l’expérience professionnelle et le lieu de contrôle des sujets. Les résultats indiquent que plusieurs facteurs peuvent prédire ou influencer l’état de stress des PNC. Ils montrent une relation significative entre le lieu de contrôle des sujets, l’évaluation cognitive de la situation aversive, le lieu de prise en charge de la victime en arrêt cardiaque et l’état de stress des PNC. Ainsi, les sujets « internalistes » évaluant la situation aversive comme un défi et développant des stratégies d’ajustement centrées sur les problèmes sont les moins stressés. Par ailleurs, le milieu aéronautique augmente l’état de stress des PNC en raison de la forte responsabilité morale envers la victime-passager, du confinement de la cabine, du délai de la mise en œuvre du quatrième maillon de la chaîne de survie ainsi que de la ressource sociale limitée en vol. Enfin, l’amélioration de la formation en premiers secours peut aider les PNC à mieux appréhender cette situation d’urgence en vol. / On board commercial transport aircraft when a passenger suffers from a cardiac arrest, the cabin crew members, called "PNC" (Personnel Navigant Commercial) in aviation terminology, act as any rescuer by initiating survival chain to improve the prognosis of the victim. With a very serious training and periodically upgrade, cabin crew members are able to handle medical emergencies and first-aid related to potential emergencies, discomfort states as well as those related to a circumstance and a particular environment. Cardiopulmonary resuscitation, exceptional and rare task in flight, generates the most frequent negative emotions and stress from cabin crew members. This research deals with the stress of cabin crew members in the management of a cardiopulmonary resuscitation in flight using a psychological approach and particularly the related transactional theory of Lazarus and Folkman (1984) in which appraisal and coping are central. Developed from a data collection built by semi-structured interviews with a group of 32 cabin crew members volunteers flying on small passenger carrying capacity aircraft, it aims to identify the factors influencing their stress in a synchronic perspective. Also, in order to identify the most possible explanation for the variance of stress, we took into account both personal variables such as professional experience and locus of control of the subjects.The results indicate that several factors can predict or influence the cabin crew members’stress. They show a significant relationship between the subject’s locus of control, appraisal of aversive situation, place of management of the victim in cardiac arrest and the stress of the cabin crew members. Thus, « internalist » subjects who assess the situation as a challenge and develop strategies focused on the problems are less stressed. Furthermore, the aviation industry increases the stress state of the cabin crew because of the strong moral responsibility to the victim-passenger, confinement of the cabin, the period of the implementation of the fourth link in the chain of survival (medicalized CPR) and the limited social resource in flight. At last, the improvement of first-aid training can help cabin crew members to manage better this specific situation on board.

Realizamos este estudo com o objetivo de analisar as principais variáveis clínicas dos pacientes que sofreram parada cardiorrespiratória e detectar fatores prognósticos de sobrevivência a curto e longo prazos, tentando oferecer subsídios aos profissionais de saúde que estão envolvidos com reanimação. Analisamos prospectivamente 452 pacientes que receberam reanimação em hospitais gerais de Salvador. Utilizou-se análise bivariada e estratificada nas associações entre as variáveis e a curva de sobrevida para análise de nove anos de evolução. Observamos 24% de sobrevida imediata e 5% de sobrevida à alta hospitalar. Os fatores prognósticos de sobrevida imediata foram: ter doença de base, a enfermidade cardiovascular, diagnosticar o ritmo cardíaco , ritmo de fibrilação ou taquicardia ventricular, tempo estimado pré-reanimação menor ou igual a cinco minutos; tempo de reanimação menor ou igual a 15 minutos. As variáveis prognósticas sobrevida a longo prazo foram: não usar adrenalina; ser reanimado em hospital privado;tempo de reanimação menor ou igual a 15 minutos / The objectives of this study are to analyze the main clinical and demographic characteristics of patients who suffer cardiac arrest and identify variables involved in survival outcomes. The study enrolled 452 patients, which received cardiopulmonary resuscitation in general hospitals. We prospectively analyzed the main variables associated with ROSC and survival to hospital discharge utilizing bivariate and stratified. The Kaplan-Meier technique was used to analyze the survival curves after nine years. Of the 452 resuscitation attempts, 107 (24%) patients had ROSC and only 22 (5%) were discharge from hospital. The variables with greatest prognostic value for immediate survival were: having a co-morbid condition, cardiovascular disease as the etiology, determination of cardiac rhythm, ventricular arrhythmia as rhythm of arrest, estimated pre-resuscitation time less than or equal to 5 minutes and the resuscitation effort duration less than or equal to 15 minutes. The variables associated with better long term survival were: not using adrenaline, being resuscitated in a private hospital and resuscitation efforts lasting less than or equal to 15 minutes

Therapeutic hypothermia (TH) is the only clinically used intervention that suppresses nearly all manifestations of ischemia-reperfusion injury after cardiac arrest. Experimental models has proven that exogenous antioxidants have positive impact on ischemia-reperfusion injury and it is able to prevent it as well. Results in this thesis are based on application of high dosages of N-acetylcystein (NAC) on ischemia-reperfusion injury after experimental cardiac arrest in a porcine model. It was used as a form of monoteraphy or in combination with TH. During the experiment animals were randomized into 5 groups: administration of NAC and TH (group A), administration of NAC during cardiac arrest (group B), induction of TH (group C), without any intervention (group D) and administration of NAC after return of spontaneous circulation (group E). We were not able to confirm additive effect of NAC in combination with TH. Administration of NAC during cardiac arrest led to statistically important reduction of oxidative stress but in the same time anafylactic reaction led to higher mortality in group B and changes in hemodynamical parameters in group E. Key words: Therapeutic hypothermia, cardiac arrest, N-acetylcysteine, ischemia-reperfusion injury, cardiopulmonary resuscitation, oxidative stress, oxygen radicals

Successful cardiopulmonary resuscitation is the first step to rescue life during cardiac arrest. High mortality even after successful restoration of spontaneous circulation is substantially caused by patophysiological process associated with ischemia-reperfusion injury and it is widely called post-cardiac arrest syndrome (PCAS). There are many patophysiological mechanisms involved in the development and progress of this syndrom; the key role seems to play oxidative stress, triggering the activation cascade of systemic inflammatory reaction. In our study we have tested different possibilities of influencing the post-cardiac arrest syndrom. In the first experimental study we have compared the effect of mild therapeutic hypothermia with controlled normothermia on PCAS in a porcine model of cardiac arrest. In the second study we have compared in the same model the protective effects of mild therapeutic hypothermia, administration of nitric oxide and ischemic postconditioning. Results of the first experiment have revealed that mild therapeutic hypotermia is superior in the resuscitability, maintenance of blood pressure, oxidative stress suppression and organ damage protection than controlled normothermia. In the second experiment we have shown that neither nitric oxide administration, nor ischemic...