توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Two–dimentional speckle tracking strain imaging in the assessment of myocardial diastolic function in patients with stable angina pectoris
اطلاعات انتشار: Reviews in Clinical Medicine، دوم،شماره۳، ۲۰۱۵، سال
تعداد صفحات: ۶
Introduction: Ischemic heart disease is caused mainly by obstruction of coronary arteries. The ischemic assessment through echocardiography is dependent on wall motion abnormality detection during systole. In patients with ischemic heart disease the diastolic function is impaired before systolic function and measurement of regional diastolic dysfunction if possible will be most sensitive for assessment of obstructed coronary artery region. This study was designed to determine whether regional left ventricular delayed relaxation diagnosis could be detected with strain imaging derived from two–dimensional speckle–tracking echocardiography in patients with coronary artery disease.Methods: All the articles reviewed were obtained using MEDLINE & ScienceDirect (up to October 2014). All data extracted by speckle tracking echocardiography. The index which is used is strain imaging diastolic index which is calculated as: (A–B) A×100 . A is the amount of strain at the time Aortic value closure and B is the amount of strain in first one–third point of diastolic duration.Result: Four articles were reviewed. Three articles assessed patients with echocardiography at rest and one with stress echocardiography. All articles showed the coronary artery tracking with significant stenosis is possible by regional deformation analysis through two–dimensional strain.Discussion: The usage of strain images obtained through two–dimensional speckle tracking has been validated for the quantitation assessment of regional dysfunction in ischemic heart disease. Regional LV delayed relaxation diagnosis with strain imaging is a reliable method after treadmill stress test.Conclusion: Strain imaging is reasonable for evaluation of ischemia as a low cost noninvasive test with high accuracy.

۲Prognostic value of strain and strain rate in the prediction of postoperative atrial fibrillation in patients undergoing coronary artery bypass grafting: a systematic literature review
اطلاعات انتشار: Reviews in Clinical Medicine، سوم،شماره۲، ۲۰۱۶، سال
تعداد صفحات: ۵
Introduction: Atrial fibrillation (AF) is a common dysrhythmia postoperatively after coronary artery bypass grafting (CABG). Myocardial strain and strain–rate imaging is used for the assessment of postoperative atrial fibrillation (POAF) as a new echocardiographic method. Methods: PubMed and Scopus were searched thoroughly using the following search terms: (strain and strain rate) AND (atrial fibrillation OR AF) on March 2015 to find English articles in which the strain and strain–rate echocardiographic imaging had been used for the evaluation of AF in patients undergone CABG. Full text of the relevant papers was fully reviewed for data extraction.Result: Of overall 6 articles found in PubMed, 10 records found in Scopus and 4 articles found through reference list search, only 6 papers fully met the inclusion criteria for further assessment and data extraction. The results of strain and strain–rate assessment showed that in total of 542 patients undergoing CABG, POAF occurred in 106 patients. Studies showed that the reduction of left atrial (LA) strain rate is correlated with AF. Consistently, the results of present review showed that LA strain and strain–rate in patients who developed AF postoperatively after CABG are significantly reduced, suggesting that strain and strain–rate could be a predictor of POAF.Conclusion: Based on the obtained results, strain and strain–rate is a suitable and accurate echocardiographic technique in the assessment of left atrial function , and it might be helpful to detect the patients who are at high risk of POAF.

۳Does global longitudinal speckle–tracking strain predict left ventricular remodeling in patients with myocardial infarction? a systematic review
اطلاعات انتشار: Reviews in Clinical Medicine، سوم،شماره۳، ۲۰۱۶، سال
تعداد صفحات: ۳۴
Introduction: Left ventricular remodeling is a relatively prevalent complication of acute myocardial infarction (AMI), and it is associated with higher rates of medical issues and mortality. Left ventricle ejection fraction (LVEF) and wall motion score index (WMSI) are unable to detect accurately minor lesions following AMI. Global longitudinal strain (GLS), which is obtained through 2D–speckle tracking echocardiography (2D–STE), provides an angle–dependent measurement by which the infarcted area can be assessed as a means of identifying potential dysfunction. The main objective of this study was to evaluate whether GLS could adequately predict LV remodeling in AMI patients. Methods: The MEDLINE database from database inception to May 6th, 2015, was searched for relevant keywords and the reference lists of systematic reviews and eligible studies were also screened. All studies involving patients with their first reported case of AMI were examined for GLS by 2D–STE and were evaluated for LV remodeling at a three–month follow–up point. Four English–language prospective cohort studies were eligible for inclusion in this study.Result: A total of 291 AMI patients (mean age=57.92 years) were investigated across four different studies. The main finding of this study was that the most reliable and consistent measurement for the purposes of predicting LV remodeling in AMI patients is GLS obtained at the time of discharge, especially in STEMI patients.Discussion: In addition to their poor reproducibility, inability to stratify risks, and inter–observer variability, compensatory hyperkinesis of intact myocytes and myocardial stunning after an AMI are among the main reasons why LVEF and WMSI may not be the most effective predictors of LV remodeling in AMI.Conclusion: GLS obtained by 2D–STE at the time of discharge could be used as a reliable predictor of LV remodeling in AMI patients.
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