blood lactate level as an indicator of low output syndrome in patients with heart failure - low output syndrome and lactate

We conducted a research study to clarify whether blood lactate level has a predictive value for detecting LOS in patients with heart failure (HF) (n=32) who required single spot pulmonary artery catheter(PAC) study during treatment (average age; 66years, male; 69%). Blood lactate level showed significant correlations between stroke volume index and cardiac index (r=-0.49 p<0.01, r=-0.66 p<0.001, respectively). When the cut-off point of blood lactate level was 10 mg/dl, the sensitivity (88%) + specificity (96%) of the test was maximal, and the accuracy was 94% for the identification of low CI (below 2.2).