Abstract
The concurrent management of type 2 diabetes mellitus (T2DM) and chronic congestive heart failure presents several therapeutic challenges. Of concern is that insulin and insulin-sensitizing medications detrimentally "flood" the heart with energy-providing substrates, including fats and glucose. In this population, treatment of T2DM should focus on the reduction of increased substrate supply. Sodium glucose cotransporter-2 (SGLT-2) inhibitors, a new class of antidiabetic medication, operate via this principle by blocking the reabsorption of glucose in the kidney and subsequently releasing glucose through the urine. In this review, we begin with an examination of the mechanisms of glucotoxicity and lipotoxicity in the heart. Then we analyze the potential role of SGLT-2 inhibitor therapy in patients with concurrent T2DM and chronic heart failure. Based on the available evidence, SGLT-2 inhibitors are safe and can be recommended to treat T2DM in patients with chronic heart failure and intact renal function. Further studies are in progress to assess long-term survival benefits.
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