This study aims at evaluating the myocardial triglyceride content and cardiac structure and function, using 1H magnetic resonance spectroscopy and cardiac magnetic resonance imaging, in patients with Cushing's syndrome before and after treatment and in age-, sex- and BMI-matched healthy volunteers. The investigators make the hypothesis that Cushing's syndrome patients compared to healthy subjects present with excess lipid storage in cardiac myocytes, reversible upon correction of hypercortisolism.
Despite skeletal muscle atrophy, Cushing's syndrome patients have an increased Left Ventricular mass, reversible upon correction of the hypercortisolism. This may be due to cardiac steatosis, previously demonstrated in patients with diabetes mellitus. This study aims at evaluating the myocardial triglyceride content and cardiac structure and function, using 1H magnetic resonance spectroscopy and cardiac magnetic resonance imaging (CMRI), in patients with Cushing's syndrome and in age-, sex- and BMI-matched healthy volunteers. The patients will be stratified into two groups in function of the presence or absence of diabetes mellitus or impaired glucose and will be evaluated twice: before and 6 months after efficient treatment of Cushing's syndrome. We make the hypothesis that Cushing's syndrome patients compared to healthy subjects have excess lipid storage in cardiac myocytes irrespectively of the glucose homeostasis status, and that this lipid content will decrease after the correction of hypercortisolism.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
DIAGNOSTIC
Masking
SINGLE
Enrollment
60
Metabolic status of the patients evaluated by an OGTT (measuring plasma glucose, insulin and plasma nonesterified fatty acids concentrations) and myocardial Imaging and spectroscopy will be performed before and 6 month after treatment
Metabolic status of the patients evaluated by an OGTT (measuring plasma glucose, insulin and plasma nonesterified fatty acids concentrations) and myocardial Imaging and spectroscopy will be performed before treatment
AP-HP, Bicêtre Hospital
Le Kremlin-Bicêtre, France
RECRUITINGLeft Ventricular (LV) intramyocardial triglyceride / water ratio LV intramyocardial triglyceride / water ratio
Intramyocardial triglyceride content will be assessed by 1H magnetic resonance spectroscopy
Time frame: Assessed twice in patients - before and 6 months after treatment - and once in volunteers
Left Ventricular intramyocardial fatt fraction (Dixon)
In/Out of Phase Imaging (Dixon)
Time frame: Assessed twice in patients - before and 6 months after treatment - and once in volunteers
Subcutaneous and visceral abdominal fatt
ISubcutaneous and visceral abdominal fat masses were determined from abdominal axial images at the L3 to L4 level
Time frame: Assessed twice in patients - before and 6 months after treatment - and once in volunteers
Cardiac morphology and function
LV mass index, LA, LV and Right Ventricular (RV) ejection fractions and LV and RV stroke volumes assessed by Cardiac Magnetic Resonance Imaging (CMRI)
Time frame: Assessed twice in patients - before and 6 months after treatment - and once in volunteers
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