应变率显像定量评价成人隐匿性自身免疫性糖尿病患者左心室长轴功能

目的 探讨应变率显像技术定量评价成人隐匿性自身免疫性糖尿病(LADA)患者左心室长轴功能的价值.方法无合并症的LADA患者30例(LADA组),合并高血压且左心室构型正常的LADA患者30例(LADA+NLVH组);正常人30例(对照组).所有患者左室射血分数、短轴缩短率均在正常范围内且无任何心脏疾病.用应变显像分别测量长轴方向16节段心肌收缩期、舒张早期和舒张晚期的峰值应变率,分析三组之间的差异.结果 LADA组和LADA+NLVH组患者各期长轴方向16节段的峰值应变率均较正常对照组显著减低(P＜0.05或P＜0.01),LADA组与之间比较LADA+NLVH组收缩期平均峰值应变率差异无统计学意义(P＞0.05),LADA+NLVH组舒张早期和舒张晚期平均峰值应变率较LADA组明显减低(P＜0.05).结论应变率显像能够敏感、准确地评价LADA患者左心室心肌运动功能.

Longitudinal left myocardial function in patients with latent autoimmune diabetes in adults quantitatively assessed by strain rate imaging

Objective To discuss the clinical value of strain rate imaging in quantitatively evaluating segmental myocardial function of left ventricle in latent autoimmune diabetes in adult(LADA).Methods Thirty LADA without complication(LADA group),30 LADA patients with hypertension and normal geometric left ventricle(LADA+NLVH group)and 30 healthy people(control group)were enrolled.All patients had normal ejection fraction,normal fractional shortening and no cardiac symptoms.The strain rate in systolic,early and later diastolic periods were obtained from 3 consecutive heartbeats in 16 segments respectively.The parameters were quantitatively analyzed between the three groups.Results Compared with the control group,all of the measured parameter of LADA and LADA+NLVH were significantly lower(P＜0.05 or P＜0.01).Although the mean strain rate in early and later diastolic periods decreased significantly in LADA+NLVH group than in LADA group(P＜0.05),there was no significant difference in the mean systolic strain rate between the two groups (P＞0.05).Conclusions Strain rate imaging provides a sensitive and accurate tool to assess the left ventricular myocardial performance in patients with LADA.