糖尿病发生心功能不全的危险性比非糖尿病患者男性高4倍,女性高8倍。有人报告在一般群体中糖尿病的患病率为2．9%,其中有15．8%并发Ⅲ～Ⅳ度心功能不全。说明糖尿病常并发心功能不全。关于糖尿病并发心功能不全的机理十分复杂,除可由并发的冠状动脉粥样硬化心脏病与高血压病恶化引起者外,还能由发生与冠状动脉粥样硬化和高血压无关的心肌损害(糖尿病性心肌病)所致。发生糖尿病性心肌病时心肌能出现以下改变：①出现糖尿病性微血管病、发生微循环障碍；②出现心脏神经原性调节障碍,发生糖尿病性植物神经病；③出现心肌生物电活性障碍,可发生心律失常和血液循环代偿失调；④出现左心室肥厚和扩张,发生心肌氧耗增加 The risk of developing cardiac dysfunction in diabetes is 4 times higher than in non-diabetic men and 8 times higher in women. It was reported in the general population prevalence of diabetes was 2.9%, of which 15.8% with Ⅲ ~ Ⅳ degree of cardiac insufficiency. Diabetes often complicated with cardiac insufficiency. The mechanism of diabetes mellitus complicated by cardiac insufficiency is very complicated. In addition to those caused by the concomitant coronary heart disease and hypertension, myocardial damage can be caused by coronary atherosclerosis and hypertension (diabetes mellitus Caused by cardiomyopathy). Occurrence of diabetic cardiomyopathy in the myocardium can occur the following changes: ① diabetic microangiopathy, microcirculation; ② appear neurogenic disorder, the occurrence of diabetic autonomic neuropathy; ③ bioelectrical activity of myocardial biogenesis may occur heart rhythm Disorders and decompensation of blood circulation; ④ appear left ventricular hypertrophy and expansion, increased myocardial oxygen consumption