Does glutamate influence myocardial and peripheral tissue metabolism after aortic valve replacement for aortic stenosis?
2006 (English)In: Clinical Nutrition, ISSN 0261-5614, Vol. 25, no 6, 913-922 p.Article in journal (Refereed) Published
Background & aims
Glutamate plays an important role for myocardial metabolism in association with ischaemia. Patients with coronary artery disease characteristically demonstrate increased uptake of glutamate. Improved recovery of myocardial metabolism and haemodynamic state after coronary surgery has been reported in patients treated with glutamate infusion. However, the effect of glutamate has not been studied after other cardiac surgical procedures. In addition, the effects of glutamate on peripheral tissue metabolism remain to be described.
Twenty patients undergoing surgery for aortic stenosis were studied after randomisation to blinded infusion of glutamate or saline during 1 h immediately after skin closure. Myocardial and leg tissue metabolism were assessed with organ balance techniques.
Postoperative glutamate infusion induced a marked increase in myocardial and leg tissue uptake of glutamate. This was associated with a significant uptake of lactate in the heart. The negative arterial–venous differences of amino acids and free fatty acids across the leg were significantly smaller in the glutamate group. Haemodynamic state remained stable and did not differ between groups.
The heart and peripheral tissues consumed the exogenously administered glutamate after surgery for aortic stenosis. Potentially favourable effects of glutamate on myocardial and peripheral tissue metabolism are suggested.
Place, publisher, year, edition, pages
2006. Vol. 25, no 6, 913-922 p.
Glutamate; Myocardial metabolism; Humans; Aortic stenosis; Surgery
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-14022DOI: 10.1016/j.clnu.2006.04.002OAI: oai:DiVA.org:liu-14022DiVA: diva2:22475