Improvement Of Left Ventricular Diastolic Dynamics In Prediabetic Stage Of A Type Ii Diabetic Rat Model After Troglitazone Treatment

Troglitazone, an oral antidiabetic agent, has hypoglycemic effects in insulin-resistant animal models and humans. This study was conducted to evaluate its effect on left ventricular diastolic dynamics of a spontaneous diabetic (DM) rat model. Twenty DM rats and 20 age-matched nonDM rats were used, and 10 of each group were treated with troglitazone as a 0.2% food admixture for 10 weeks, At 5 and 15 weeks of age, Doppler echocardiography and M-mode echocardiography were performed. Troglitazone treatment significantly improved the left ventricular diastolic dynamics of DM rats: deceleration time (msec) of early diastolic inflow decreased significantly (treated 52 +/-3 vs untreated 64 +/-5, p=0.0002), and peak velocity of early transmitral inflow (cm/sec) increased significantly (treated 96 +/-7 vs untreated 86 +/-8, p = 0.0216). The data suggest that troglitazone improves left ventricular diastolic dynamics of a DM rat model at prediabetic stage.