Impact of Aortic Valve Replacement on Glycemic Control in Diabetes Mellitus

  • Peter Michael Rodgers-Fischl University of Kentucky Medical Center
Keywords: Aortic Valve Replacement, Diabetes Mellitus


Introduction: The Framingham Studies revealed diabetes mellitus (DM) predisposed subjects to a 2-8 fold increase in risk in developing heart failure (HF). Much less information is available about the reverse issue; namely is there an increased risk of developing DM in patients with HF.  We sought to determine if reversal/partial reversal of HF through aortic valve replacement would improve glycemic control in patients with DM at our institution.

            Methods: Electronic medical records of 57 consecutive diabetic patients who underwent aortic valve replacement (AVR) at a medium sized academic medical center from May 2005 through May 2015 and had glycated hemoglobin (HbA1C) measuredbefore and after the procedure were retrospectively analyzed. Variables of interest included  HbA1C  and echocardiographic parameters such as left ventricular ejection fraction (LVEF), tricuspid regurgitation velocity (TRV), and right ventricular systolic pressure (RVSP) before and after valve replacement.

            Results: HbA1C decreased significantly during the first year after replacement, from 7.1% (range 4.4-13.0%) before surgery to 6.5% in the first year (p < .05). Also, calculated RVSP decreased from 44 mmHg (20-79 mmHg) to 37 (p<0.05 from the preoperative value). LVEF and TRV did not change significantly.   Reductions in HbA1C and RVSP during the first year were greater in patients who experienced an increase of 5% or more in EF at their first postoperative measurement.  Patients with higher baseline HbA1C had a greater decline in glycated Hb during the first year (p < 0.01).

            Conclusion: AVR was associated with a reduction of HbA1C and decrease of pulmonary artery systolic pressure within one year of the procedure.

Keywords: Aortic Valve Replacement, Glycemic Control, Heart Failure

Author Biography

Peter Michael Rodgers-Fischl, University of Kentucky Medical Center
Cardiothoracic Surgery - Resident Physician


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