INTRODUÇÃO: A intervenção coronária percutânea (ICP) tem importante papel no tratamento da doença arterial coronária, em decorrência do desenvolvimento tecnológico e da ampliação de sua utilização nos cenários clínicos de maior complexidade. Apresentamos a experiência de serviço de hemodinâmica que iniciou sua atividade há cinco anos, localizado em hospital em Campinas (SP). MÉTODOS: De 2006 a 2011, 518 pacientes foram submetidos consecutivamente a ICP no Hospital Vera Cruz e incluídos neste estudo. As características clínicas, angiográficas e do procedimento e os resultados clínicos hospitalares foram analisados. RESULTADOS: A média de idade dos pacientes foi de 65,8 + 12,2 anos, 73,5% eram do sexo masculino, 29,9% eram diabéticos e metade dos procedimentos foi realizada na vigência de síndrome coronária aguda. No total, foram tratadas 890 lesões (74% delas do tipo B2/C), sendo implantado 1,6 stent/paciente, 37,1% dos quais farmacológicos. O diâmetro e o comprimento do stent foram, respectivamente, de 3,01 + 0,53 mm e 23,2 + 7 mm. O sucesso do procedimento foi de 93,6%, óbito ocorreu em 2,9% dos pacientes, acidente vascular cerebral em 0,8%, infarto do miocárdio em 3,5%, ICP de urgência em 0,8%, e trombose de stent em 0,97%. Hipertensão arterial [odds ratio (OR) 4,48, intervalo de confiança de 95% (IC 95%) 1,32-15,16; P = 0,016] e diabetes (OR 7,24, IC 95% 1,69-31,05; P = 0,008) foram preditores independentes de eventos adversos cardíacos e cerebrovasculares maiores (ECCAM) hospitalares. CONCLUSÕES: O sucesso do procedimento e a baixa ocorrência de ECCAM demonstram a efetividade e a segurança da ICP no atendimento de pacientes da prática clínica diária tratados em um novo serviço de cardiologia intervencionista, inserido em hospital localizado fora da capital do Estado de São Paulo.

BACKGROUND: Percutaneous coronary intervention (PCI) plays an important role in the treatment of coronary artery disease, as a result of technological development and its wide application in different clinical scenarios of greater complexity. We present data from a cath lab that started its activity five years ago at a private hospital in the city of Campinas (SP). METHODS: From 2006 to 2011, 518 consecutive patients were submitted to PCI at the Vera Cruz Hospital and were included in this study. Clinical, angiographic and procedural characteristics and the in-hospital clinical outcomes were analyzed. RESULTS: Patient average age was 65.8 + 12.2 years, 73.5% were male, 29.9% were diabetics and half of procedures were performed during an acute coronary syndrome. A total of 890 lesions (74% B2/C type) were treated with 1.6 stents/patient, 37.1% of them were drug eluting stents. Stent diameter and length were 3.01 + 0.53 mm and 23.2 + 7 mm, respectively. The procedure success was 93.6%, death occurred in 2.9% of the patients, stroke in 0.8%, myocardial infarction in 3.5%, reintervention in 0.8% and stent thrombosis in 0.97%. Hypertension [odds ratio (OR) 4.48, 95% confidence interval (95% CI) 1.32-15.16; P = 0.016] and diabetes (OR 7.24, 95% CI 1.69-31.05; P = 0.008) were independent predictors of in-hospital major adverse cardiac and cerebrovascular events (MACCE). CONCLUSIONS: The overall procedural success and low incidence of MACCE demonstrated the efficacy and safety of PCI in the daily clinical practice in a new interventional cardiology service, localized in a hospital outside the capital of the state of São Paulo.

Two experiments evaluated an operant procedure for establishing stimulus control using auditory and electrical stimuli as a baseline for measuring the electrical current threshold of electrodes implanted in the cochlea. Twenty-one prelingually deaf children, users of cochlear implants, learned a Go/No Go auditory discrimination task (i.e., pressing a button in the presence of the stimulus but not in its absence). When the simple discrimination baseline became stable, the electrical current was manipulated in descending and ascending series according to an adapted staircase method. Thresholds were determined for three electrodes, one in each location in the cochlea (basal, medial, and apical). Stimulus control was maintained within a certain range of decreasing electrical current but was eventually disrupted. Increasing the current recovered stimulus control, thus allowing the determination of a range of electrical currents that could be defined as the threshold. The present study demonstrated the feasibility of the operant procedure combined with a psychophysical method for threshold assessment, thus contributing to the routine fitting and maintenance of cochlear implants within the limitations of a hospital setting.

Limiares auditivos de crianças surdas pré-linguais usuárias de implante coclear foram avaliados com estimulação elétrica em um dos eletrodos mediais. A avaliação empregou um procedimento operante do tipo go/no go para ensinar uma discriminação simples, evidenciada por uma resposta motora, entre presença e ausência do estímulo auditivo. Estabelecida a linha de base, a manipulação na intensidade do estímulo foi implementada de acordo com o método psicofísico de escada modificado, começando por uma seqüência descendente. Os sete participantes do estudo mostraram perda da precisão no responder sob controle do estímulo quando a intensidade diminuía além de um certo valor e a precisão era recuperada quando a intensidade era novamente aumentada, o que permitiu a identificação de limiares individuais. Os resultados sugerem que o método psicofísico combinado com o procedimento operante pode ser uma alternativa viável para avaliar limiar auditivo de pessoas sem linguagem em situação clínica de regulagem do implante coclear.

Auditory thresholds of prelingually deaf children who received cochlear implants were evaluated for the electrical stimulation to one of the medial electrodes. A go/no go operant procedure was used to teach a simple discrimination, indicated by a motor response, between the presence versus the absence of an auditory stimulus. Simple discrimination was used as a baseline upon which the electrical stimulus's intensity was manipulated in a decreasing sequence followed by an increasing sequence, according to a modified psychophysical staircase method. The accuracy of responding in the presence of the electrical stimulus was reduced for all seven participants when the stimulus intensity decreased bellow a certain value and was recovered when the stimulus intensity was increased to the previous level. The experimental design allowed reliable identification of individual thresholds. The results suggest that the psychophysical paradigm in combination with the operant procedure might be useful for the evaluation of the auditory threshold for purposes of cochlear implant fitting in clinical settings.