Myocardial Strain Measured by Epicardial Transducers—Comparison Between Velocity Estimators

Myocardial deformation (strain) measured by DENSE reliably detects myocardial scar

Methods By using a 1.5T scanner have 68 patients with a high likelihood of coronary artery disease been included. The following MRI protocol was used: cine SSFP, single slice multiphase Displacement ENcoding with Stimulated Echoes (DENSE) during breath holding, perfusion during adenosine stress and at rest and late gadolinium enhancement. Ejection fraction was calculated from the short axis cin...

Dissociation between epicardial and transmural function during acute myocardial ischemia.

The relationship between epicardial and transmural function (measured with sonomicrometers) was examined in 13 anesthetized open-chest dogs. Systolic wall thickening was used as a standard of integrated transmural function to compare with epicardial function measured as segment shortening parallel to surface fibers. Three levels of coronary inflow restriction were produced by using decrements i...

Myocardial, Perivascular, and Epicardial Fat

Myocardial fat content refers to the storage of triglyceride droplets within cardiomyocytes. In addition, the heart and arteries are surrounded by layers of adipose tissue, exerting vasocrine and paracrine control of the subtending tissues. The rapid development of the field of noninvasive imaging has made it possible to quantify ectopic fat masses and contents with an increasing degree of accu...

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

Myocardial Infarction Measured by Reflected Ultrasound

Serial measurements of left ventricular posterior wall movement were made in eight patients with acute myocardial infarction by an ultrasound technique. Maximum posterior wall velocity and excursion were decreased during the first 36-hour period after infarction. In two patients a reduction in posterior wall velocity was associated with an increased pulmonary artery pressure and as the pressure...