J Clin Monit Comput - Capability of a new paediatric oesophageal Doppler monitor to detect changes in cardiac output during testing of external pacemakers after cardiac surgery.

Tópicos

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Resumo

CKGROUND: The Cardio QP? oesophageal Doppler monitor measures the velocity time integral of the blood flow in the descending aorta. Based on system integrated normograms of the aortic cross-sectional area of a paediatric population, the cardiac output is calculated and displayed.OBJECTIVE: Evaluation of the capability of the Cardio QP? to detect changes in cardiac output during desynchronizing ventricular pacing (VVI) in children after cardiac surgery.PATIENTS: Eleven children (6 female, 5 male) with epicardial pacemaker electrodes admitted to the paediatric intensive care unit (PICU) after corrective surgery for congenital heart defects. Mean age: 6.3 (2.1-15.0) months, mean body weight: 5.3 (3.5-7.8) kg.INTERVENTIONS: After baseline measurements of cardiac output (base I), we performed 3 steps, each lasting 5 min: (1) ventricular pacing (VVI), (2) baseline (base II) recording, (3) atrial pacing (AOO). We measured the effects on haemodynamic parameters and blood gases as well as on the measured cardiac output.RESULTS: Ventricular pacing, with atrio-ventricular dyssynchrony, led to a significant drop in blood pressure and central venous saturation. Cardiac output parameters showed a decrease in stroke volume (SV) from 4.9?2.2 to 4.2?2.1 ml (P = 0.005) and cardiac index (CI) (2.6?1.1-2.1?0.8 ml/min/m(2)) (P = 0.009) during ventricular pacing. Cardiac index and haemodynamic parameters during atrial stimulation did not show significant changes from baseline.CONCLUSION: The Cardio QP? seems to be capable of detecting slight changes in cardiac output.

Resumo Limpo

ckground cardio qp oesophag doppler monitor measur veloc time integr blood flow descend aorta base system integr normogram aortic crosssect area paediatr popul cardiac output calcul displayedobject evalu capabl cardio qp detect chang cardiac output desynchron ventricular pace vvi children cardiac surgerypati eleven children femal male epicardi pacemak electrod admit paediatr intens care unit picu correct surgeri congenit heart defect mean age month mean bodi weight kgintervent baselin measur cardiac output base perform step last min ventricular pace vvi baselin base ii record atrial pace aoo measur effect haemodynam paramet blood gase well measur cardiac outputresult ventricular pace atrioventricular dyssynchroni led signific drop blood pressur central venous satur cardiac output paramet show decreas stroke volum sv ml p cardiac index ci mlminm p ventricular pace cardiac index haemodynam paramet atrial stimul show signific chang baselineconclus cardio qp seem capabl detect slight chang cardiac output

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