Regional Strain and Strain Rate Measurements by Cardiac Ultrasound: Principles, Implementation and Limitations

Quantification of Regional Myocardial Function following Acute Myocardial Infarction by Ultrasonic Strain Rate and Strain Imaging

Objectives: The rapid diagnosis and early risk stratification of patients presenting with acute myocardial infarction (AMI) is important. In experimental setting ultrasonic strain rate (SR) and strain (S) have been shown to identify changes in deformation predictive of ischemia. We sought to evaluate and compare regional myocardial function at “the risk zone” (ARZ) supplied by the culprit coron...

Regional asynchrony during acute myocardial ischemia quantified by ultrasound strain rate imaging.

OBJECTIVES We propose a new method to easily quantify asynchronous wall motion due to postsystolic shortening (PSS). We also studied the relationship of the spatial and temporal extent of PSS to the extent of myocardium at ischemic risk after variable duration of ischemia. BACKGROUND Postsystolic shortening is a sensitive marker of asynchrony during ischemia. Current techniques for detection ...

Strain rate imaging of the left ventricle by ultrasound . Feasibility

myocardial strain and strain rate imaging: comparison between doppler derived strain imaging and speckle tracking echocardiography

Myocardial function defined by strain rate and strain during alterations in inotropic states and heart rate.

For porcine myocardium, ultrasonic regional deformation parameters, systolic strain (epsilon(sys)) and peak systolic strain rate (SR(sys)), were compared with stroke volume (SV) and contractility [contractility index (CI)] measured as the ratio of end-systolic strain to end-systolic wall stress. Heart rate (HR) and contractility were varied by atrial pacing (AP = 120-180 beats/min, n = 7), incr...