The objective of this study is to identify subjects at risk defined by the existence of an alteration in the maximal longitudinal contractility of the left ventricle by measuring myocardial deformation in magnetic resonance imaging (MRI) before (D1) and after (D15±3) an imposed metabolic change (insulin treatment and correction of hyperglycaemia) in a population with type 2 diabetes in primary prevention requiring the start of insulin therapy because of an imbalance in their diabetes (HbA1c ≥ 10%). To do so, patients and healthy volunteers will be matched on sex and age (+/- 5 years).
In the type 2 diabetic population, some patients are particularly at risk of developing early heart failure. Finding markers to identify these at-risk individuals is therefore an important scientific objective in order to avoid/delay the development of heart failure.~The protocol will be proposed to type 2 diabetic patients hospitalized for insulin therapy upon admission to the diabetology department and healthy volunteers.