Transplant candidate's clinical status rather than right ventricular function defines need for univentricular versus biventricular support

The Journal of Thoracic and Cardiovascular Surgery
Robert L KormosB P Griffith

Abstract

We have studied our experience since 1988 with 31 patients who required a mechanical circulatory bridge to transplantation and also had biventricular failure (mean right ventricular ejection fraction 11.8%) to better define the need for biventricular or total artificial heart support versus univentricular support. Clinical factors including preoperative inotropic need, fever without detectable infection, diffuse radiographic pulmonary edema, postoperative blood transfusion, and right ventricular wall thickness were compared with hemodynamic parameters including cardiac index, right ventricular ejection fraction, central venous pressure, mean pulmonary arterial pressure, and total pulmonary resistance for ability to predict need for mechanical or high-dose inotropic support for the right ventricle. Patients were grouped according to need for right ventricular support after left ventricular-assist device implantation: none (group A, 14) inotropic drugs (group B1, 7), and right ventricle mechanical support (group B2, 10). There were no differences in preimplantation hemodynamic variables. Groups B1 and B2 had significantly lower mixed venous oxygen saturation (39.2% vs 52.5% in group A; p < 0.001), greater level of inotropic need ...Continue Reading

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