1276 A R T Í C U L O D E I N V E S T I G A C I Ó N Evaluación de función diastólica intraoperatoria con ecocardiografía transesofágica, ¿es útil? María Carolina Cabrera S, Silvia Schmied P, Raúl Vega S, Irini Semertzakis P, Jaime De La Maza C. Intraoperative diastolic dysfunction as a risk factor for hemodynamic instability Background: Diastolic function can be evaluated intraoperatively using transesophageal echocardiography. Aim: To study if intraoperative diastolic dysfunction is associated to a greater number of hemodynamic events during surgery and during the postoperative period. Material and methods: Patients with indication of intraoperative transesophageal echocardiography due to cardiovascular diseases were included in the study. Diastolic function was assessed measuring transmitral intraventricular filling delay and pulmonary vein flow. Patients were divided, according to diastolic dysfunction, in those with derangements in relaxation, pseudonormalization and restrictive patterns. Hypertension, hypotension, ST segment depression, alterations in myocardial contractility, pulmonary congestion and postoperative oliguria were recorded. Results: Fifty eight patients aged 68–12 years (39 males), were studied. Forty four had diastolic dysfunction. Intraoperative hypotension occurred in 82% of patients with diastolic dysfunction and 16% of patients without it. Likewise, hypotension and oliguria during the postoperative period were more common in patients with diastolic dysfunction. Conclusions: In this group of patients with cardiovascular disease, intraoperative diastolic dysfunction is a risk factor for hemodynamic instability (Rev Méd Chile 2007; 135: - ). ( Key words: Cardiac output; Echocardiography, transesophageal; Hemodynamic phenomena; Myocardial contraction) Recibido el 17 de agosto, 2006. Aceptado el 20 de abril, 2007. Trabajo realizado sin financiamiento externo. Departamento de Anestesiología, Hospital Clínico Fuerza Aérea de Chile y Universidad de Valparaíso, Chile. Correspondencia a: María Carolina Cabrera S. Fernández Mira 796, Las Condes, Santiago. E mail: carol218@vtr.net Rev Méd Chile 2007; 135: 1276-1281 L a evaluación de la función cardíaca es de gran importancia durante el intraoperatorio. Esta evaluación es prioritaria en pacientes con función cardiovascular alterada por diferentes patologías. El efecto de las drogas anestésicas y sus cambios en la fisiología cardiovascular serán determinantes en la morbimortalidad perioperatoria. El uso de la ecocardiografía transesofágica (ETE) intraoperato- ria, como monitor hemodinámico durante la ciru- gía, ha sido un avance importante para el manejo