Effect of Empagliflozin on Left Ventricular Mass and Diastolic Function in Individuals With Diabetes: An Important Clue to the EMPA-REG OUTCOME Trial?
Abstract
Amid the excitement over the results of the BI 10773 (Empagliflozin) Cardiovascular Outcome Event Trial in Type 2 Diabetes Mellitus Patients (EMPA-REG OUTCOME) trial (1), the potential mechanisms through which empagliflozin produced a rapid and profound reduction in hospitalization for heart failure and cardiovascular (CV) death in subjects with type 2 diabetes remain entirely unexplained. Importantly, the effects of empagliflozin on objective measures of cardiac structure and function are unknown (2). We report the first systematic analysis of echocardiograms of 10 patients with type 2 diabetes and established CV disease in whom empagliflozin 10 mg/day was initiated as per approved clinical indication, without any other concurrent changes in medications. Transthoracic echocardiograms, performed before and 3 months after initiation of empagliflozin, were analyzed by an experienced cardiac echocardiographer not involved in the clinical care of the patients and blinded to identity of the patients and the study order (pre vs. post). Informed patient consent and ethics approval were obtained.
Baseline patient characteristics were as follows: 80% were men, age was mean (SD) 67.6 (6.6) years, 40% had a previous myocardial infarction, 90% had undergone vascularization, and estimated glomerular filtration rate was 77.5 (21.3) mL/min/1.73 m2. Background medications included the following: eight patients on metformin, five patients on dipeptidyl peptidase-4 inhibitors, one …
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