Objetivo: Análise da relação custo-efetividade do tratamento com o uso do DCI - Desfibrilador Cardioversor Implantável comparado com o tratamento clínico alternativo através de medicamentos. Revisão de literatura: O estudo contemplou a revisão da conceituação das técnicas de avaliação econômica e de apropriação de custos de procedimentos hospitalares, bem como experiências sobre a análise da relação custo-efetividade aplicadas às intervenções médicas consideradas na pesquisa. Métodos: O estudo utilizou a unidade de Custo por AVG - Ano de Vida Ganho, como expressão do indicador de custo-efetividade. A metodologia compreendeu a definição da perspectiva da pesquisa (Sistema Único de Saúde na qualidade de principal financiador do implante de DCIs, no Brasil), elaboração dos protocolos padrões de tratamento, cálculo dos custos totais dos tratamentos baseados em indicadores praticados por hospitais de referência, os quais encontram-se estimados para o período de dez anos e ajustados para valor presente à taxa de desconto de 6% ao ano. No âmbito da efetividade, foram utilizados parâmetros da literatura, os quais encontram-se baseados nos anos de vida ganhos do tratamento com o uso do DCI, em relação ao tratamento clínico. Resultados: O custo por AVG alcançado pelo estudo foi de R$ 20.530,00, cerca de US$ 9.550. Esse indicador de efetividade foi calculado com base nos parâmetros de custo incremental de R$ 54.200,00 e expectativa de vida de 2,64 anos, decorrentes do uso do DCI comparado com o tratamento clínico. Discussão: O estudo considerou comparações com indicadores da literatura, faixas de atratividade, análises de sensibilidade, impactos sobre financiamento e limitações da pesquisa. Conclusões: O índice de custo-efetividade do tratamento com DCI mostrou-se favorável, sob as condições de atratividade ajustadas à realidade brasileira, embora enfrente dificuldades de financiamento por parte do SUS, considerando o substancial impacto financeiro das indicações de uso do referido tratamento. / Objective: Cost-effectiveness analysis of implantable cardioverter defibrillator therapy (ICD) compared with conventional drug therapy. Literature review: The study comprised the conceptualization of techniques of economic evaluation, the methodology of appropriation of hospital procedure costs and different experiences on cost-effectiveness analysis applied to medical interventions considered in this research. Methods: The study used the unit Cost per Life-Year Gained (LYG) as an index of cost-effectiveness. The methodology included the definition of the research scope (Sistema Único de Saúde as the main payor of the ICD\'s implant, in Brazil), creation of standard protocols of treatment, and calculation of treatment total cost based on indicators used by well known hospitals, which are estimated for ten years and adjusted to a discount rate of 6% a year. Concerning effectiveness, some parameters from the literature were applied, which are demonstrated by LYG with the implant of ICD, compared to the alternative drug therapy. Results: The cost per life-year gained reached by the study was of R$ 20,530.00, approximately US$ 9,550. This ratio of effectiveness was calculated on the basis of the parameters of additional cost of R$ 54,200.00 and the life expectancy of 2.64 years with the use of ICD compared to the drug treatment. Discussion: The study considered comparisons with indicators comprised in the literature, range of attractiveness, sensitivity analysis, impact over financing and limitations of research. Conclusions: The chosen cost-effectiveness indicator for ICD therapy was favorable, under the adjusted attractiveness conditions adapted to the actual Brazilian health care sector. This conclusion holds in spite of the present financial difficulties experienced by SUS, and the substantial financial impact this kind of therapy may generate.

Background: The ICD controls the heart rhythm and reacts to serious heart rhythm abnormalities and trigger, if necessary, a defibrillation to restore the heart to normal rhythm. Living with an ICD can provide major changes in everyday life. Nurse´s important role regards to provide relevant patient education to include promoting the health and quality of life (QOL) for these individuals. Purpose: To describe QOL for people living with an ICD, from a gender and age perspective, and to examine the included articles selection strategy and research group. Method: The result of this descriptive literature review compiled from eleven quantitative scientific articles, sought in PubMed and Scopus. Main Results: Women reported lower QOL then men linked to impaired mental, physical and social function. Also a greater concern and anxiety were found in women. Mental illness affected mainly young people, who also experienced a lower acceptance to the device than older ICD- receivers. Older people reported less concern that the ICD would deliver a shock. However, a reduced QOL related to higher incidence of physical impairment, were noticed in the elderly ICD- receivers compared to the younger. Four articles specified their selection strategy. All reported the number of participants and how many were men and women. The age range of participants was specified in five articles. Conclusion: Impacts on QOL could be discerned to different gender and ages. These findings confirmed the need for health professionals to access more holistic patient- education programs that focus not only on the technical aspects of living with an ICD but more on the individual impact. / Bakgrund: En ICD kontrollerar hjärtrytmen, reagerar på allvarliga hjärtrytmrubbningar och utlöser vid behov en defibrillering för att återställa normal hjärtrytm. Att leva med en ICD kan innebära stora omställningar i det vardagliga livet. Sjuksköterskan har en betydande roll i omvårdnaden kring dessa personer där bland annat relevant patientutbildning är viktig för att främja personers hälsa och livskvalitet. Syfte: Syftet med denna litteraturstudie var att beskriva livskvaliteten hos personer som lever med en implanterbar defibrillator (ICD), ur ett köns- och åldersperspektiv, samt att granska de inkluderade artiklarnas urvalsstrategi och undersökningsgrupp. Metod: Denna beskrivande litteraturstudies resultat sammanställdes utifrån elva granskade artiklar av kvantitativ ansats, eftersökta i databaserna PubMed och Scopus. Huvudresultat: Kvinnor rapporterade lägre livskvalitet än männen kopplat till nedsatt mental, fysisk och social funktion. Även en ökad oro och ångest förekom hos kvinnor. Psykisk ohälsa utvecklades främst hos yngre, vilka också upplevde lägre acceptans till enheten än äldre ICD- bärare vilket påverkade livskvaliteten. Äldre personer rapporterade mindre oro över att ICD:n skulle defibrillera. Dock sågs en nedsatt livskvalitet relaterat till högre förekomst av fysisk nedsättning i större grad hos äldre än yngre ICD- bärare. Fyra av resultatartiklarna angav använd urvalsstrategi. Samtliga redogjorde för antalet deltagare och hur många som var män respektive kvinnor. Åldersspannet mellan deltagarna angavs i fem artiklar. Slutsats: Olika inverkan på livskvaliteten kunde skönjas både mellan kön och olika åldrar. Dessa fynd bekräftade behovet av att sjukvårdspersonal behöver få tillgång till mer holistiska patientutbildningsprogram som inte enbart fokuserar på de tekniska aspekterna av att leva med en ICD.

Low levels of physical activity (PA) are a significant predictor of early death among recipients of implantable cardioverter defibrillators (ICDs). Regular, moderate PA is associated with improved quality of life (QOL), reduced arrhythmia burden, and improved health outcomes in ICD recipients yet many do not engage in PA and the reasons for lack of engagement are unclear. The purpose of this descriptive, cross-sectional study was to examine health beliefs related to PA and QOL in adults living with ICDs. The Health Belief Model provided the theoretical framework for this study. A convenience sample of 107 adult, ICD recipients (26 females and 81 males) were recruited from five cardiology clinic settings within the same private practice. Seventy-seven percent completed the study tasks (N=81). Subjects completed a Demographic Data Questionnaire, Self-Efficacy Expectations after ICD Scale, Exercise Self-Efficacy Scale, Health Belief Questionnaire, Incidental and Planned Exercise Questionnaire and Quality of Life Medical Outcomes Survey-SF36®. Clinical data was collected from the medical record. Mean age of the subjects was 70.23 yrs. ± 11.76 yrs. The majority were male (71.6 percent) and 77.8 percent were White, non-Hispanic. Most were insured by Medicare (79 percent), were retired (50 percent) and reported incomes less than 20,000 dollars/year (39 percent). Over 98 percent were diagnosed with heart failure and almost 40 percent reported their physical activity had decreased since having an ICD implanted. There were no differences in health beliefs and QOL scores between subjects who had an ICD as a primary or secondary prevention of sudden cardiac death. Predictors of PA participation in this population were Self-Efficacy for Exercise (SEE) beliefs, Self-Efficacy ICD (SEICD) beliefs, age and NYHA Class. Almost 33 percent of variance in PA participation can be explained by SEE (b = 2.407, β = .390, t = 3.911, p<.01); SEICD (b =2.304, β = .215, t = 2.149, p<.05); age (b = -.394, β = -.234, t =-2.277, p<.05); and NYHA Class (b = -6.373, β =-.198, t = -1.998, p =<.05). Findings indicate the strength of self-confidence in influencing healthy behavior. Findings support the need for more research in identifying barriers and predictors of PA participation in adult, ICD recipients.

Ser cuidador informal de pacientes com doenças crônicas pode implicar em sobrecarga e sofrimento psicológico significativo, potencialmente prejudiciais para a própria saúde física e mental e para a recuperação do paciente. Pouco se sabe sobre as experiências e características psicossociais dos cuidadores de pacientes portadores de Cardioversor Desfibrilador Implantável (CDI), principalmente na população brasileira, de forma que o presente estudo (quantitativo descritivo transversal) teve por objetivos caracterizar demográfica e psicossocialmente uma amostra não probabilística de cuidadores informais de pacientes portadores de CDI que se encontravam em tratamento médico em um hospital-escola do interior do Estado de São Paulo. As variáveis estudadas incluíram: características sóciodemográficas, qualidade de vida, ansiedade, depressão e percepção de sobrecarga. Participaram da pesquisa 60 cuidadores, entrevistados entre setembro de 2010 a maio de 2011. Para a coleta dos dados foram usados: Roteiro de Entrevista Semiestruturada, elaborado para esta pesquisa, Questionário de Avaliação de Saúde SF-36, Escala Hospitalar de Ansiedade e Depressão e a Zarit Burden Interview. Os dados foram analisados quantitativamente de forma descritiva. Posteriormente verificou-se associação estatisticamente significativa (p<=0,05) entre algumas variáveis de interesse, por meio do Teste Exato de Fisher. Os resultados mostraram que a média de idade dos cuidadores foi de 52,5 anos (DP=14,76), eram em sua maior parte do sexo feminino (n=45, 75%), o cônjuge do(a) paciente (n=39, 65%), com escolaridade predominante de até quatro anos (n=28, 46,67%), sendo a maioria (45, 75%) portadora de problemas de saúde. Vinte e cinco cuidadores (41,67%) apresentaram sintomas indicativos de ansiedade e 13 (21,67%) de depressão. Na avaliação da qualidade de vida, a média de escore mais elevado foi no domínio Aspectos Sociais (Média=78,12, DP=27,48) e o mais baixo em Vitalidade (Média=60,25, DP=26,03). O escore médio relacionado à percepção de sobrecarga foi de 19,93 (DP=12,51, Mediana= 18,5). Os participantes relataram alterações significativas em suas vidas após o implante do CDI, preocupações com a saúde do paciente e funcionamento do dispositivo, dificuldades relacionadas ao papel de cuidador, além de dúvidas sobre o desfibrilador implantável. Os resultados confirmaram que o implante do CDI no paciente impactou significativamente na vida de seus cuidadores informais, sendo necessário o oferecimento de apoio emocional e orientações específicas por parte dos profissionais da saúde para auxiliá-los na adaptação e enfrentamento adequado dessas situações. Dada a escassez de estudos brasileiros nesta população e alguns fatores metodológicos limitantes, é necessário que mais investigações sejam realizadas para comparar estes resultados. / Being an informal caregiver of patients with chronic diseases may imply significant psychological burden and suffering, potentially harmful to caregiver\'s own physical and mental health and patient\'s recovery. Little is known about the psychosocial experiences and characteristics of caregivers of patients with Implantable Cardioverter Defibrillator (ICD), mainly in the Brazilian population, so that the purpose of the present study (transversal descriptive quantitative) was to characterize, both demographically and psychosocially, a nonprobabilistic sample of informal caregivers of patients with ICD undergoing treatment in a university hospital in the interior of the State of São Paulo. The studied variables comprised: sociodemographic characteristics, life quality, anxiety, depression and perception of burden. Sixty caregivers took part in the survey, and they were interviewed between September, 2010 and May, 2011. Data collection used the following instruments: Semi-structured Interview Script prepared for this survey, SF-36 Health Evaluation Questionnaire, Hospital Anxiety and Depression Scale and the Zarit Burden Interview. Data was analyzed quantitatively in a descriptive way. Subsequently, statistically significant association (p<=0,05) was verified between some variables of interest through Fisher\'s Exact Test. Results describe that the average age of caregivers was 52.5 years (DP=14.76), they were mostly female (n=45, 75%), and patient\'s spouses (n=39, 65%), predominantly with up to four years of education (n=28, 46.67%), and most (45, 75%) with health problems. Twenty-five caregivers (41.67%) presented symptoms related to anxiety and 13 (21.67%) to depression. In life quality evaluation, the highest average score was in the Social Aspects dominion (Average=78.12, DP=27.48) and the lowest in Vitality (Average=60.25, DP=26.03). The average score regarding burden perception was of 19.93 (DP=12.51, Median= 18.5). Participants reported significant changes in their lives after ICD implant, concerns about patient\'s health and device operation, difficulties concerning their role as caregivers, in addition to doubts about the implantable defibrillator. Results confirm that the ICD implant had a significant impact in the life of their informal caregivers, requiring provision of emotional support by healthcare professionals in order to help them adapt and properly cope with these situations. Due to the scarcity of Brazilian studies in this population and some limiting methodological factors, further investigation is required to compare these results.

Purpose. To systematically develop and conduct preliminary evaluation of a decision support intervention to engage patients and their families about whether to accept or decline implantable cardioverter-defibrillator (ICD) pulse generator replacement. Methods. A series of studies using multi-methods and guided by the Ottawa Decision Support Framework and the Normalization Process Theory: 1) an integrative review of patients’ perspectives on ICD decision-making; 2) a systematic review of the risks and benefits of ICD replacement; 3) an embedded mixed methods study to iteratively develop a patient decision aid (PDA) and simultaneously plan for its implementation; and 4) a feasibility pilot randomized controlled trial to evaluate ease of recruitment, decision support intervention delivery and data collection. Findings. The integrative review of 25 articles reported that ICD decision-making was difficult and the majority of patients misunderstood ICD therapy. The systematic review of 17 nonrandomized studies reported that complication rates are higher at replacement as compared to initial implant, mortality benefit post ICD replacement is unclear, and patients’ clinical profile can affect ICD’s effectiveness. Findings from both studies were used to draft a PDA. Interviews with 18 end-users (clinicians, patients, spouses) revealed that the current ICD replacement process is automated and needs to elicit patient preferences. The PDA was considered the optimal tool to initiate the discussion of options. In a feasibility trial, 30 patients were randomized to the decision support intervention (PDA + decision coaching) (n=15) or usual care (n=15). The intervention was used as intended, users found the PDA acceptable but acceptability of decision coaching was variable. Patients exposed to the intervention had better knowledge scores compared to controls. Conclusion. The Ottawa Decision Support Framework and Normalization Process Theory were complementary frameworks to ensure that the decision support intervention has the potential for implementation. To determine whether this approach was successful, future research is required to evaluate and implement the intervention in clinical practice. Findings from the feasibility study will be used to design an effectiveness trial.

No description available.

Polymorphic ventricular tachycardia (PVT) is a life-threatening arrhythmia that is typically related to long QT syndrome, organic heart disease, electrolyte abnormalities, cardiotoxic drugs, or adrenergic stimulation. A review of the literature reveals that PVT with normal QT interval and without underlying cause is quite rare. We report a case of idiopathic spontaneous PVT with structurally normal heart and without electrolyte abnormalities, drug reactions, or evidence of catecholamine induced arrhythmia. We also review the literature on the electrocardiographic characteristics and management of idiopathic PVT.

京都大学 / 0048 / 新制・課程博士 / 博士(医学) / 甲第21296号 / 医博第4385号 / 新制||医||1030(附属図書館) / 京都大学大学院医学研究科医学専攻 / (主査)教授 小池 薫, 教授 福原 俊一, 教授 木村 剛 / 学位規則第4条第1項該当 / Doctor of Medical Science / Kyoto University / DFAM

Long QT syndrome (LQTS) can present with syncope and seizure-like activity in the setting of torsades de pointes (TdP) with hemodynamic instability. Electrolyte abnormalities and medications can predispose to TdP in the setting of latent LQTS. An implantable cardioverter defibrillator (ICD) is needed if patients with TdP continue to be symptomatic despite medical treatment. We report a case of a patient who presented with seizures and was found to have prolonged corrected QT interval (QTc). During her admission, she was treated with ondansetron. She went into torsades de pointes and continued to have prolonged QTc. She underwent implantable cardioverter defibrillator (ICD) placement and remains asymptomatic to date.

It is a known problem that a Spinal Cord Stimulator (SCS) can interact with an Implantable Cardioverter Defibrillator (ICD) when both devices are implanted in the same patient. Interactions between the SCS and ICD can cause inappropriate therapy which can be harmful to the patient. While ICD devices have a distinct narrowband sensing bandwidth, the pulse configurations that current SCS devices deliver were not designed with this frequency region in mind. In this thesis, I recommend a new pulse configuration for SCS devices that will minimize the interaction between the two devices. I produce a theoretical equation for each pulse configuration in the frequency domain using the Laplace transform and present the results in Matlab. I also design my own SCS device to deliver multiple pulse configurations and use it to gather empirical data. The theoretical and empirical results are used to show the extent of the improvement between the new pulse and existing pulse configurations. The results prove that the new pulse configuration will significantly reduce crosstalk within the desired ICD bandwidth. A reduction in crosstalk will decrease the probability that an SCS will interact with a ICD device.