二维斑点追踪超声心动图评价非缺血性心肌病和缺血性心肌病的左心室功能

目的 应用二维斑点追踪超声心动图(2D-STE)评价非缺血性心肌病(NICM)和缺血性心肌病(ICM)的左心室功能变化.方法 选择2014年9月-2017年2月华中科技大学同济医学院附属同济医院心血管内科收治的心脏扩大且合并左心室收缩功能降低的84例患者,根据冠状动脉造影结果分为NICM组43例和ICM组41例.行常规...     

Left ventricular function in hypertension: new insight by speckle tracking echocardiography

Background: Conventional transthoracic echocardiography (TTE) and tissue Doppler imaging (TDI) are usually unable to reveal very early subtle abnormalities in left ventricular (LV) systolic function caused by hypertension, prior to manifestation of hypertrophy (LVH). This study was undertaken to assess whether speckle tracking echocardiography (STE) provides more insight into early hypertension‐induced LV systolic dysfunction, with the purpose of identifying patients at higher risk for heart failure (HF). Methods: Fifty‐one patients (56.5 ± 14 years) and 51 controls (52 ± 12.6 years) were enrolled. According to the presence or absence of LVH, patients were classified as LVH₍₊₎ and LVH_(–), respectively. Global longitudinal function was calculated by TDI, global strains [longitudinal (LS), radial (RS), and circumferential (CS)] and twist were assessed by STE. Results: Conventional TTE showed a LV diastolic dysfunction with normal systolic function in all patients. TDI was able to detect a systolic dysfunction only in the LVH₍₊₎ group (P < 0.001) whereas STE revealed an impairment of systolic LS in all patients, including those without hypertrophy (P = 0.02). Furthermore, in the LVH₍₊₎ group, STE showed reduced RS and increased CS and twist. These last alterations were observed with respect to both controls (RS: P = 0.02; CS: P = 0.05; twist: P < 0.001) and LVH_(–) patients (RS: P = 0.01; CS: P = 0.003; twist: P = 0.001). Conclusion: In hypertensive patients, STE provides more detailed information than conventional echocardiography and TDI, since it reveals a systolic dysfunction before hypertrophy occurs (Stage A of ACC/AHA classification of HF) and identifies some early LV mechanic changes that might improve the clinical management of these patients. (Echocardiography 2011;28:649‐657)     

Decreased plasma adiponectin is associated with impaired left ventricular longitudinal systolic function in hypertensive patients: a two-dimensional speckle tracking study

The influence of plasma adiponectin levels on myocardial contractile function has not been fully examined. We aimed to investigate the relationship between three-directional systolic function and plasma adiponectin levels in asymptomatic hypertensive patients using two- dimensional speckle-tracking echocardiography. The study population consisted of 78 patients with hypertension and 40 healthy controls. Longitudinal strain was significantly reduced in all patients, including those without LV hypertrophy (p?=?0.009). In multiple-regression analysis, plasma adiponectin levels (β?=??0.273, p?=?0.008) and LV mass index (β?=?0.458, p?相似文献