GDF15 and Alzheimer disease: So far, only few studies have investigated GDF‐15 and sST2 in patients with non‐ischaemic DCM.21, 37 Although an association of both GDF‐15 and sST2 with sudden cardiac death was previously demonstrated, non‐ischaemic DCM represented one‐third to one‐half of these cohorts.24, 25, 37 Because of different aetiologies of the disease leading to different risks of AD,5, 8 it is of paramount importance to separately investigate ischaemic and non‐ischaemic heart failure patients.