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dc.contributor.authorSchifelbain, Luciele Medianeira Oliveirapt_BR
dc.contributor.authorVieira, Silvia Regina Riospt_BR
dc.contributor.authorBrauner, Janete Sallespt_BR
dc.contributor.authorPacheco, Deise Motapt_BR
dc.contributor.authorNaujorks, Alexandre Antoniopt_BR
dc.date.accessioned2012-06-27T01:32:06Zpt_BR
dc.date.issued2011pt_BR
dc.identifier.issn1807-5932pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/49798pt_BR
dc.description.abstractINTRODUCTION: Echocardiographic, electrocardiographic and other cardiorespiratory variables can change during weaning from mechanical ventilation. OBJECTIVES: To analyze changes in cardiac function, using Doppler echocardiogram, in critical patients during weaning from mechanical ventilation, using two different weaning methods: pressure support ventilation and Ttube; and comparing patient subgroups: success vs. failure in weaning. METHODS: Randomized crossover clinical trial including patients under mechanical ventilation for more than 48 h and considered ready for weaning. Cardiorespiratory variables, oxygenation, electrocardiogram and Doppler echocardiogram findings were analyzed at baseline and after 30 min in pressure support ventilation and T-tube. Pressure support ventilation vs. T-tube and weaning success vs. failure were compared using ANOVA and Student’s t-test. The level of significance was p,0.05. RESULTS: Twenty-four adult patients were evaluated. Seven patients failed at the first weaning attempt. No echocardiographic or electrocardiographic differences were observed between pressure support ventilation and Ttube. Weaning failure patients presented increases in left atrium, intraventricular septum thickness, posterior wall thickness and diameter of left ventricle and shorter isovolumetric relaxation time. Successfully weaned patients had higher levels of oxygenation. CONCLUSION: No differences were observed between Doppler echocardiographic variables and electrocardiographic and other cardiorespiratory variables during pressure support ventilation and T-tube. However cardiac structures were smaller, isovolumetric relaxation time was larger, and oxygenation level was greater in successfully weaned patients.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofClinics. Sao Paulo. Vol. 66, no. 1 (Jan. 2011), p. 107-111pt_BR
dc.rightsOpen Accessen
dc.subjectEcocardiografiapt_BR
dc.subjectEchocardiographyen
dc.subjectEcocardiografia dopplerpt_BR
dc.subjectDoppler echocardiogramen
dc.subjectCardiorespiratory variablesen
dc.subjectDesmame do respiradorpt_BR
dc.subjectRespiração artificialpt_BR
dc.subjectVentilator weaningen
dc.subjectArtificial ventilationen
dc.titleEchocardiographic evaluation during weaning from mechanical ventilationpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000778409pt_BR
dc.type.originNacionalpt_BR


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