The Cardiovascular Effect of GLP-1 Agonist, SGLT2 Inhibitor and Their Combination

A. Four groups of patients with type 2 diabetes mellitus with high or very high cardiovascular risk or heart failure with preserved ejection fraction (HFpEF) will be studied before and at 6 and 12 months of treatment: * 60 patients treated with a combination of GLP1 analogue and SGLT2 inhibitor ± metformin * 60 patients treated with GLP-1 agonist as a second step after metformin * 60 patients treated with SGLT2 inhibitor as a second step after metformin * 60 patients treated with a combination of insulin and other antidiabetic agents (metformin - DPP4 inhibitors) Individuals will be equal distributed as far as age, gender and body mass index concerned. In addition, patients suffered from kidney disease and retinopathy are excluded.