Martin Krssk1, 2, Yvonne Winnhofer1, Peter Wolf1, Drazenka Jankovic1, Sabina Baumgartner-Parzer1, Rodrig Marculescu3, Michael Wolzt4, Siegfried Trattnig2, Anton Luger1, Michael Krebs1
1Division of Endocrinology and Metabolism, Department of Intrenal Medicine III, Medical University of Vienna, Wien, Austria; 2Centre of Excellence High Field MR, Department of Radiology, Medical University of Vienna, Wien, Austria; 3Department of Laboratory Diagnostics, Medical University of Vienna, Wien, Austria; 4Department of Clinical Pharmacology, Medical University of Vienna, Wien, Austria
Proton MRS and MRI were used to follow the myocardial lipid content (MYCL) and left ventricular ejection fraction (LVEF) in the course of acute hypoglycemia and 24h follow up in young healthy male volunteers (n=8). Lipolysis was alternatively inhibited to distinguish the effects of hypoglycemia and counter-regulation induced lipolysis. Acute hypoglycemia did not reduce the LVEF and MYCL, but MYCL decreased in 24h follow up measurement. Inhibition of adipose tissue lipolysis w/o insulin action was accompanied by decrease of MYCL and LVEF. We conclude that MYCL stores play a major role for the maintenance of myocardial function.