Echocardiographic Strain Analysis for the Early Detection of Myocardial Structural Abnormality and Initiation of Drug Therapy in a Mouse Model of Dilated Cardiomyopathy.

• 影响指数: 3.694
• 发表时间: 12 2017
• 来源期刊: Ultrasound Med Biol
• DOI: 10.1016/j.ultrasmedbio.2017.07.020
• PMID: 28942269
• 文章类型: Journal Article
• 中科院分区: Q2
• 方向: 医学
• 作者列表: Zheng M,Pan F,Liu Y,Li Z,Zhou X,Meng X,Liu L,Ge S

关键词: Dilated cardiomyopathy; Losartan; Speckle tracking imaging; Ultrasound biomicroscopy

Mesh: Animals; Anti-Arrhythmia Agents / therapeutic use; Cardiomyopathy, Dilated / complications diagnostic imaging drug therapy; Disease Models, Animal; Echocardiography / methods; Heart Ventricles / diagnostic imaging; Losartan / therapeutic use; Male; Mice; Mice, Inbred C57BL; Muscular Dystrophy, Animal; Treatment Outcome; Ventricular Dysfunction, Left / complications diagnostic imaging; Ventricular Remodeling

Abstract

This study aimed to evaluate the role of echocardiography-based strain analysis in the early diagnosis and guidance for management of dilated cardiomyopathy (DCM). Muscular dystrophy mice (which spontaneously develop DCM) and control (C57 BL/6 J) mice were sequentially evaluated by ultrasound biomicroscopy, conventional left ventricle (LV) measurement, two-dimensional (2-D) strain analysis and myocardial histologic analysis for 12 consecutive months. Significant alternation of LV remodeling and dysfunction could be detected by conventional echocardiography after 9 mo, by strain analysis after 5 mo and by histologic analysis after 4 mo. The global longitudinal systolic peak strain (PK) was the most sensitive strain marker for early detection of myocardial structural abnormality in the subclinical stage. Moreover, losartan administration before the PK decrease was associated with significantly preserved LV function. These results suggest that myocardial strain analysis (particularly longitudinal PK) is sensitive for the early detection of LV dysfunction in mice with dilated cardiomyopathy.