糖耐量异常对心室重塑的影响

目的 探讨糖耐量异常对心室重塑的影响及可能的机制,从而预防心室重塑的发生和发展.方法 入选患者均接受葡萄糖耐量试验(OGTT)和心脏彩色超声检查,测定E波与A波流速比值(E/A)、计算左室心肌重量(LVM)、左室心肌指数(LVMI),行24 h动态血压检测,分析糖耐量异常与心室重塑相关指标的关系.结果 合并糖耐量异常高血压组左室舒张功能减低发生率(74%)高于单纯高血压组(39%)(x2=6.5,P＜0.05),糖耐量异常组左室舒张功能减低(34%)发生率高于对照组(10%)(x2=5.2,P＜0.05).合并糖耐量异常高血压组左室肥厚发生率(24%)明显高于高血压组、糖耐量异常组及正常组(分别为7%、0、0)(x2=4.561,P＜0.05).多因素逐步回归分析显示,年龄和餐后2 h血糖值是E/A比值的独立危险因素.结论 糖耐量异常是导致左室肥厚和舒张功能减低的一个危险因素和病理基础之一,且导致左室舒张功能减低发生率高于左室肥厚.

A study of effects of impaired glucose tolerance on ventricular remodeling

Objective To evaluate the effects of impaired glucose tolerance (IGT) on ventricular remodeling. Methods Parameters of every subject including left ventricular mass ( LVM), left ventricular mass index (LVMI), E/A ratio, 75 g oral glucose tolerance test (OGTT), ambulatory blood pressure monitoring(ABPM) data including 24-hour mean systolic blood pressure(mSBP) and 24-hour mean diastolic blood pressure(mDBP) were collected. Then the relationship of IGT and myocardial remodeling related parameters were analyzed. Results The rate of diastolic dysfunction was higher in the IGT combined with hypertensive group(74% ) compared with the hypertensive group( 39% )( x2 = 6. 5, P ＜ 0. 05 ). The rate of diastolic dysfunction was higher in the IGT group( 34% ) compared with the normal group( 10% ) (x2 = 5.2,P ＜0. 05). The rate of Left Ventricular Hypertrophy (LVH)in the IGT combined with hypertensive group (24%) was higher than the other three groups (Hypertension group 7%, IGT group 0, Normal group 0) (x2 =4.561,P ＜0.05), and there was no significance between the rest three groups (P ＞0.05).Stepwise multiple regression showed age and 2 Hours' Postprandial Blood Glucose were independent risk factors of E/A ratio. Conclusions These results suggested that IGT is a possible contributor to left ventricular hypertrophy and diastolic dysfunction, and is one of the histopathology of left ventricular remodeling.