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  • Title: The effect of type 2 diabetes on diastolic function.
    Author: Baldi JC, Aoina JL, Whalley GA, Carrick-Ranson G, Walsh HA, O'Shaughnessy H, Bagg W, Doughty RN.
    Journal: Med Sci Sports Exerc; 2006 Aug; 38(8):1384-8. PubMed ID: 16888449.
    Abstract:
    PURPOSE: This study aimed to determine whether sedentary overweight subjects with type 2 diabetes have impaired diastolic function compared with equally sedentary and overweight nondiabetic subjects. METHODS: Mitral valve pulsed Doppler echocardiography and tissue Doppler imaging (TDI) were used to assess left ventricular structure and diastolic function in 40- to 60-yr-old sedentary overweight subjects with type 2 diabetes (N = 13) and age- and body mass-matched sedentary nondiabetic subjects (N = 15). Pseudonormal filling was identified using preload reduction and TDI. RESULTS: Traditional Doppler mitral inflow parameters were not different between groups; however, early diastolic relaxation, as measured by peak early mitral annular velocity (E') and the ratio of E' and peak late mitral annular velocity (E'/A'), was reduced in type 2 diabetic subjects (P < 0.05). The ratio of peak early mitral inflow (E) to E' (E/E'), an estimate of left ventricular filling pressure, was also higher in the type 2 diabetes group (P < 0.05). The proportions of diastolic impairment (69 vs 40%) and pseudonormal filling (39 vs 20%) were not different between groups (P = 0.18). CONCLUSION: These findings suggest that type 2 diabetes has an effect on diastolic function that is independent of age and body composition.
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