Neurohumoral and inflammatory markers for prediction of right ventricular failure after implantation of a left ventricular assist device

Abstract

Purpose: Implantation of a left ventricular assist device (LVAD) is an established treatment for end-stage heart failure. Right ventricular dysfunction develops in 20%-50% of patients after device implantation, leading to prolonged hospital stays and elevated mortality rates. However, prediction of right ventricular failure remains difficult.

Methods: A total of 40 patients who received an LVAD for chronic end-stage heart failure between May 2001 and December 2002 were evaluated. The patients were divided retrospectively into two groups: group I (n = 26), with no apparent postoperative right ventricular failure; and group II (n = 14), with right ventricular failure after implantation defined by the presence of two of the following criteria during the first week after surgery: mean arterial pressure ≤ 55 mmHg, central venous pressure ≥ 16 mmHg, mixed venous saturation ≤ 55%, cardiac index <2 l/min/m(2), inotropic support score >20 units or an apparent need for mechanical right ventricular support. Hemodynamic, echocardiographic, neurohumoral, and inflammatory parameters were evaluated 24 h before implantation of the LVAD.

Results: Levels of procalcitonin, neopterin, n-terminalpro-brain natriuretic peptide, and big endothelin-1 were significantly lower in group I: 0.106 vs. 0.322 ng/ml, P = 0.048; 10.5 vs. 20.7 ng/ml, P = 0.018; 6322 vs. 17174 pg/ml, P = 0.032; 1.6 vs. 19.5 pg/ml, P = 0.02, respectively. Levels of creatinine kinase and creatinine were significantly lower in group I than in group II: 24 vs. 40 U/l, P = 0.034; 1.3 vs. 2.3 mg/dl, P = 0.008, respectively.

Conclusion: Preoperative evaluation of markers of inflammation and neurohumoral activation may provide additional information for predicting right ventricular failure after implantation of an LVAD.