On this basis, the investigators study will evaluate whether the dysfunction of adrenergic cardiac innervation, evaluated by MIBG, persist after previous experience of transient stress-induced cardiac dysfunction. Moreover, the investigators will assess whether the medications that restore sympatho-vagal alterations in diabetic cardiomyopathy, such as α-lipoic acid and L-acetyl carnitine, will improve the adrenergic cardiac innervation, in patients with SC.